QUATERNARY AMMONIUM COMPOUNDS based on BENZYLAMINES with the general formula phenyl-CN+R3.
Negative ions or salts derived from bromic acid, HBrO3.
An acidifying agent that has expectorant and diuretic effects. Also used in etching and batteries and as a flux in electroplating.
A colorless liquid with a sharp burning taste and slight odor. It is used as a local anesthetic and to reduce pain associated with LIDOCAINE injection. Also, it is used in the manufacture of other benzyl compounds, as a pharmaceutic aid, and in perfumery and flavoring.
A highly polar organic liquid, that is used widely as a chemical solvent. Because of its ability to penetrate biological membranes, it is used as a vehicle for topical application of pharmaceuticals. It is also used to protect tissue during CRYOPRESERVATION. Dimethyl sulfoxide shows a range of pharmacological activity including analgesia and anti-inflammation.
Derivatives of ammonium compounds, NH4+ Y-, in which all four of the hydrogens bonded to nitrogen have been replaced with hydrocarbyl groups. These are distinguished from IMINES which are RN=CR2.
Alcohols derived from the aryl radical (C6H5CH2-) and defined by C6H5CHOH. The concept includes derivatives with any substituents on the benzene ring.
Individuals professionally qualified in the management of patients' records. Duties may include planning, designing, and managing systems for patient administrative and clinical data, as well as patient medical records. The concept includes medical record technicians.
Authoritative treatises on drugs and preparations, their description, formulation, analytic composition, physical constants, main chemical properties used in identification, standards for strength, purity, and dosage, chemical tests for determining identity and purity, etc. They are usually published under governmental jurisdiction (e.g., USP, the United States Pharmacopoeia; BP, British Pharmacopoeia; P. Helv., the Swiss Pharmacopoeia). They differ from FORMULARIES in that they are far more complete: formularies tend to be mere listings of formulas and prescriptions.
Natural or synthetic dyes used as coloring agents in processed foods.
Silver. An element with the atomic symbol Ag, atomic number 47, and atomic weight 107.87. It is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. Long-continued use of silver salts can lead to a form of poisoning known as ARGYRIA.
A strong oxidizing agent used in aqueous solution as a ripening agent, bleach, and topical anti-infective. It is relatively unstable and solutions deteriorate over time unless stabilized by the addition of acetanilide or similar organic materials.
An agency of the PUBLIC HEALTH SERVICE concerned with the overall planning, promoting, and administering of programs pertaining to maintaining standards of quality of foods, drugs, therapeutic devices, etc.
Contamination of bodies of water (such as LAKES; RIVERS; SEAS; and GROUNDWATER.)
Pesticides used to destroy unwanted vegetation, especially various types of weeds, grasses (POACEAE), and woody plants. Some plants develop HERBICIDE RESISTANCE.
Chemicals used to destroy pests of any sort. The concept includes fungicides (FUNGICIDES, INDUSTRIAL); INSECTICIDES; RODENTICIDES; etc.
Pesticides designed to control insects that are harmful to man. The insects may be directly harmful, as those acting as disease vectors, or indirectly harmful, as destroyers of crops, food products, or textile fabrics.
Adverse effect upon bodies of water (LAKES; RIVERS; seas; groundwater etc.) caused by CHEMICAL WATER POLLUTANTS.
Inorganic compounds derived from hydrochloric acid that contain the Cl- ion.
The hair of SHEEP or other animals that is used for weaving.
Purifying or cleansing agents, usually salts of long-chain aliphatic bases or acids, that exert cleansing (oil-dissolving) and antimicrobial effects through a surface action that depends on possessing both hydrophilic and hydrophobic properties.
A subclass of PEPTIDE HYDROLASES that catalyze the internal cleavage of PEPTIDES or PROTEINS.
Exclusive legal rights or privileges applied to inventions, plants, etc.
Any member of the group of ENDOPEPTIDASES containing at the active site a serine residue involved in catalysis.
Hydrolases that specifically cleave the peptide bonds found in PROTEINS and PEPTIDES. Examples of sub-subclasses for this group include EXOPEPTIDASES and ENDOPEPTIDASES.
Compounds which inhibit or antagonize biosynthesis or actions of proteases (ENDOPEPTIDASES).
The generic term for salts derived from silica or the silicic acids. They contain silicon, oxygen, and one or more metals, and may contain hydrogen. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th Ed)
A generic term for a variety of compounds that contain silicon, oxygen, and magnesium, and may contain hydrogen. Examples include TALC and some kinds of ASBESTOS.
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A relatively hard, translucent, restorative material used primarily in anterior teeth. (From Boucher's Clinical Dental Terminology, 4th ed, p50)
Any of the numerous types of clay which contain varying proportions of Al2O3 and SiO2. They are made synthetically by heating aluminum fluoride at 1000-2000 degrees C with silica and water vapor. (From Hawley's Condensed Chemical Dictionary, 11th ed)
Colloids with liquid continuous phase and solid dispersed phase; the term is used loosely also for solid-in-gas (AEROSOLS) and other colloidal systems; water-insoluble drugs may be given as suspensions.
The covalent bonding of an alkyl group to an organic compound. It can occur by a simple addition reaction or by substitution of another functional group.
A nonmetallic element with atomic symbol C, atomic number 6, and atomic weight [12.0096; 12.0116]. It may occur as several different allotropes including DIAMOND; CHARCOAL; and GRAPHITE; and as SOOT from incompletely burned fuel.
An enzyme that transfers methyl groups from O(6)-methylguanine, and other methylated moieties of DNA, to a cysteine residue in itself, thus repairing alkylated DNA in a single-step reaction. EC 2.1.1.63.
Biocompatible materials usually used in dental and bone implants that enhance biologic fixation, thereby increasing the bond strength between the coated material and bone, and minimize possible biological effects that may result from the implant itself.
Substances used on inanimate objects that destroy harmful microorganisms or inhibit their activity. Disinfectants are classed as complete, destroying SPORES as well as vegetative forms of microorganisms, or incomplete, destroying only vegetative forms of the organisms. They are distinguished from ANTISEPTICS, which are local anti-infective agents used on humans and other animals. (From Hawley's Condensed Chemical Dictionary, 11th ed)
Chemicals especially for use on instruments to destroy pathogenic organisms. (Boucher, Clinical Dental Terminology, 4th ed)
Rendering pathogens harmless through the use of heat, antiseptics, antibacterial agents, etc.
Pharmacologic agents delivered into the nostrils in the form of a mist or spray.
It is used as an oxidizing and bleaching agent and as a disinfectant. (From Grant & Hackh's Chemical Dictionary, 5th ed)
A liquid that functions as a strong oxidizing agent. It has an acrid odor and is used as a disinfectant.
Inorganic compounds that contain chlorine as an integral part of the molecule.

Synthesis and reactions of N-methylbenzylammonium fluorochromate(VI) on silica gel, a selective and efficient heterogeneous oxidant. (1/2)

N-Methylbenzylammonium fluorochromate(VI) (MBAFC) is easily synthesized by addition of N-methylbenzylamine to an aqueous solution of CrO3 and HF. MBAFC shows selectivity in the oxidation of aryl alcohols to their corresponding aldehydes and ketones under mild conditions. The durability, ease of work up and efficiency of MBAFC are considerably increased upon its absorption on silica gel.  (+info)

Two-dimensional NMR spectroscopy reveals cation-triggered backbone degradation in polysulfone-based anion exchange membranes. (2/2)

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The anion exchange membrane find application in diverse process such as electrodialysis, diffusion analysis, membrane electrolysis, reverse osmosis and membrane fuel cells, which are energy, resource and environment saving. The development of ion-exchange membrane of high chemical, mechanical and thermal stability, which meet growing demand of the aforementioned processes, is of great importance. This paper deals with the determination of the membrane permselectivity coefficient of anion exchange membranes for concentration of citric acid using electrodialysis process. The permselectivity coefficient of three types of commercial anion exchange membranes; Neosepta ACS(Tokuyama, Japan), Neosepta AHA2(Tokuyama, Japan) and 204UZR412(Ionics. Inc., USA) were compared in consideration to the physicochemical data of these membranes published so far are not adequate to their industrial application particularly for citric acid concentration. The permselectivity coefficient is the ability of anion exchange ...
TY - JOUR. T1 - Optimized anion exchange membranes for vanadium redox flow batteries. AU - Chen, Dongyang. AU - Hickner, Michael Anthony. AU - Agar, Ertan. AU - Kumbur, E. Caglan. PY - 2013/8/14. Y1 - 2013/8/14. N2 - In order to understand the properties of low vanadium permeability anion exchange membranes for vanadium redox flow batteries (VRFBs), quaternary ammonium functionalized Radel (QA-Radel) membranes with three ion exchange capacities (IECs) from 1.7 to 2.4 mequiv g-1 were synthesized and 55-60 μm thick membrane samples were evaluated for their transport properties and in-cell battery performance. The ionic conductivity and vanadium permeability of the membranes were investigated and correlated to the battery performance through measurements of Coulombic efficiency, voltage efficiency and energy efficiency in single cell tests, and capacity fade during cycling. Increasing the IEC of the QA-Radel membranes increased both the ionic conductivity and VO2+ permeability. The 1.7 mequiv g-1 ...
The formation of gypsum (CaSO4·2H2O) scale in ion-exchange membranes was investigated under a Donnan exchange regime. Two types of anion exchange membranes (AEM), homogeneous AMV and heterogeneous MA-40, were used for the study. Counter-ion flux, scaling-cation concentration in the fouled membrane and membrane potential served as indicators for membrane scaling. Locations of scaling domains were dependent on the membrane structure, and lead to different effects on the membrane performance. Scaling in the homogeneous membrane was mainly characterized by surface deposits, resulting in a moderate decrease of the counter-ion flux. On the other hand, the heterogeneous membrane showed a high degree of internal precipitation resulting in a complete clogging of the membrane, thus leading to earlier and more severe decline in counter-ion flux. Significant amounts of calcium were found within the fouled MA-40, supporting the other indications of internal scaling. The potential difference across the ...
In the current research, polyvinylchloride based mixed matrix heterogeneous anion exchange membranes were prepared by a solution casting technique. Titanium dioxide nanoparticles were also utilized as inorganic filler additive in the membrane fabrication. The effect of TiO2 nanoparticles concentration in the casting solution on the membrane physico-chemical properties was studied. Membrane water content was decreased by an increase of nanoparticle concentration. Ion exchange capacity was also improved initially by an increase of nanoparticle content ratio and then slightly decreased. The membrane fixed ionic concentration, membrane potential, transport number and permselectivity were all increased by an increase of additive loading ratio. The membrane ionic permeability was enhanced initially by an increase of nanoparticle concentration up to 0.5 %wt in the membrane matrix and then decreased by more additive content ratio from 0.5 to 4 %wt. Membrane ionic resistance was declined by using TiO2
New, high molecular weight poly-(fluorene-alt-tetrafluorophenylene) anion exchange membranes were synthesized by a Pd-catalyzed C-H activation method. The synthesized membranes exhibited high OH− conductivity over 100 mS cm−1, and membrane swelling could be suppressed by controlling the side chain length of the pol
A novel surface modified anion exchange membrane (AEM) was prepared by electrodeposition of graphene oxide (GO) and polydopamine (PDA) coating, aiming at improving antifouling performance and stability. The AEM was firstly modified by electrodeposition of GO and then immersed into the dopamine solution to form a thin PDA layer. The effects of GO and PDA composite modification were investigated by various analytical techniques and electrodialysis application. The [email protected] AEM ([email protected]) exhibited highly hydrophilic and negatively charged. In addition, the introduction of PDA coating helped to construct a smoother and denser composite modifying layer composed of GO and PDA, and reduced the roughness of membrane surface. Depending on these properties, the [email protected] AEM showed significant antifouling ability without compromising the desalination performance. After being fouled by 150 mg/L sodium dodecyl benzene sulfonate (SDBS) for 4 h, the desalination rate of [email protected] increased by ...
292993171 - EP 1159295 A1 2001-12-05 - METHOD OF PURIFYING WHEY OF LACTIC ACID FERMENTATION BY ELECTRODIALYSIS - [origin: US6204362B1] In a method of purifying whey separated from lactic acid fermentation liquid by electrodialysis wherein said whey contains angiotensin-converting enzyme inhibiting peptides, the improvement which comprises using an anion exchange membrane having a permeability of diffusion coefficient in the range of 3.0 to 9.0x10-6 cm/sec. An anion exchange membrane having a permeability of diffusion coefficient in the range of 5.0 to 7.0x10-6 cm/sec. is more efficiently used. The product is particularly suited to produce granules and tablets.[origin: US6204362B1] In a method of purifying whey separated from lactic acid fermentation liquid by electrodialysis wherein said whey contains angiotensin-converting enzyme inhibiting peptides, the improvement which comprises using an anion exchange membrane having a permeability of diffusion coefficient in the range of 3.0 to 9.0x10-6 cm/sec. An
All information described in this bulletin is based upon tests and data believed to be reliable. It is the users responsibility to determine performance and suitability of the products. No guarantee, expressed or implied, is made by Membranes International Inc., nor does Membranes International Inc. assume any liability for patent infringement arising from the use of these products.. ...
The Author(s) 2014. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited. [DOI: 10.1149/2.0971410jes] All rights reserved ...
The purpose of this study was to develop an economical, safe and environmentally friendly electrochemical process for the conversion and recovery of Fe and H2SO4 from a FeSO4 leaching solution. For this purpose, two basic ...
In this thesis Reverse Electrodialysis (RED) is central. A RED stack comprises of alternating series of cation exchange membranes (CEMs) and anion exchange membranes (AEMs), with seawater and river water compartments between these membranes.. From the salinity gradient, energy is harvested while controlling the mixing of seawater and river water. Membranes allow selective transport of cations (CEM) and anions (AEM). A voltage difference is created due to the difference in salinity across the membrane. At the electrodes redox reactions are used, to convert ionic transport into electrical transport, to power a device.. We came up with creative strategies to prevent fouling, says Jordi Moreno. The most high-profile idea concerned the concept of breathing cells. We brought this proof of principle - confirmed earlier in lab environments by dr. ir. David Vermaas - a decisive step further. The stack is now automatically operable which is practically relevant.. In the breathing cell concept, instead ...
Our products fumasep FAB, FKB and FBM are designed and optimized for electrodialysis with bipolar membranes. The EDBM is the combination of conventional electrodialysis for salt separation with electrochemical water splitting for the conversion of a salt into its corresponding acid and base. fumasep FAB is an anion exchange membrane which is developed for very low proton crossover to receive a high concentration of acid. fumasep FKB is a cation exchange membrane optimized for high cation transport in combination with high OH- retention. fumasep FBM is a bipolar membrane, which induce the splitting of water into protons and hydroxide ions. The bipolar membrane fumasep FBM combines high selectivity and efficiency as well as high chemical stability within a broad pH range, excellent mechanical stability and low electrical resistance. It is ideally suited for the production of acid and base from the corresponding salts, as well as for innovative concepts such as biological fuel cells. The patented ...
Baranek, A., Kendrick, L., Narayanan, J., Patton, D. (2013). Quaternary Ammonium Functional Polybenzoxazines for Anion Exchange Membrane (AEM) Applications. Abstracts of Papers of the American Chemical Society, 245 ...
Galactosyl-oligosaccharides (GOS) are non-digestible oligosaccharides which are qualified as functional foods. GOS are enzymatically synthesized from lactose by transgalactosylation catalyzed by the enzyme β-galactosidase. In this study, a method for immobilization of β-galactosidase from Kluyveromyces lactis on a chromatography membrane was developed. The immobilization was performed at 4, 15 and 40°C. A strong basic anion exchange membrane was investigated. In static experiments the highest enzyme activity was measured at an immobilization procedure temperature of 15°C. The immobilization on the chromatography membranes was found to be very rapid likely due to ionic adsorption. The synthesis of GOS was carried out in a Continuous Membrane Chromatography Reactor System (CMCRS) at 40°C and pH 7.0 using 20 wt% initial lactose concentration. The chromatography membranes proved to be a good support for the continuous process at high convective flow rates in the enzyme reactor system. Up to 82 ...
The simultaneous transport of sulphuric and phosphoric acids through a polymeric membrane was investigated at steady state in a two-compartment counter-current dialyzer. For this purpose, an anion exchange membrane Neosepta-AFN (Astom Corporation, Tokyo, Japan) was used. This transport was quantified by four membrane mass transfer coefficients which are dependent upon the concentrations of both acids in the feed. These coefficients were determined by a two-step procedure. In the first step, the basic differential equations describing the dependences of the volumetric liquid flow rates and acid concentrations on the length coordinate in the individual compartments were numerically integrated. In the second step, an objective function was minimised to ensure the best coincidence between the experimental and calculated data ...
hours leached 30±7.5% (95% confidence level) of this Tot-P in litter, measured by anion exchange membrane extraction. This increased to 46.9% of apparent P release at 115 days. The released P was incorporated into microbial biomass during leaching so modifying leachate concentrations. Using liquid chloroform fumigation it was estimated that 36.2 ± 15.6% (95% confidence level) of Tot-P leached during the 115-day inundation was in the microbial biomass pool, not directly measured by AEM extraction. P leaching during initial and prolonged inundation correlated with litter Ca, Mg and total base concentration, but the initial Tot-P concentration of litter was the best predictor for P leaching, in both short-term and prolonged inundation (R2 = 0.80 and 0.93, p , 0.0001). The high P leaching rate during 24 hours suggested that P from litter during first storm events could produce a significant P flux from local catchments and contribute nutrients to downstream wetlands.. ...
A polytetrafluoroethylene-quaternary 1,4-diazabicyclo-[2.2.2]-octane polysulfone composite membrane for alkaline anion exchange membrane fuel ...
Imidazolium-functionalized styrenic copolymers have been widely studied as candidates for use as anion exchange membranes in carbon dioxide and water electrolysis systems. Recent new developments in catalytic electrode materials suggest that electrolyzers based on this technology will be commercially viable. Nevertheless, important aspects of the physicochemical behavior of these membrane materials, especially transformations occurring upon activation in strongly alkaline media, remain incompletely understood. We will discuss results from 1- and 2-D NMR, IR, IEC, and DSC studies of imidazolium-functional styrenic copolymer membrane materials recovered after activation by exposure to 1M KOH solution and reacidification in HCl. The work sheds some new light on such aspects as chemical reactions and polymer crosslinking processes occurring in strong base, although mechanistic questions remain ...
A cation exchange membrane is disclosed comprising fluorinated polymer layers which include, in order, a layer with sulfonic exchange groups, a layer with carboxylic exchange groups, and a thinner layer with carboxylic exchange groups at a greater exchange capacity than the other carboxylic layer.
This work covers the direct glucose anion exchange membrane fuel cell (AEMFC) with near-neutralstate electrolyte of 0.1 M [PO4] (tot) having two high-performing anode electrocatalysts (Pt and PtNi) at 37 degrees C and at a glucose concentration of 0.1 M. The cathode catalyst in each test was a Pt supported on carbon (60 wt.%). The PtNi/C had a total metal content of 40 wt.% and the Pt/C 60 wt.%. The operation of the AEMFC was controlled by means of an in-house made electronic load with PI-controller (i.e. a feedback controller, which has proportional and integral action on control error signal). There were two primary objectives with this study. At first, to find out how the electrode modifications of the anode (i.e. by increasing the thicknesses of these electrodes by adding extra carbon) affect the Coulombic efficiency (CE, based on the exchange of two electrons) and the specific energy (SPE, Wh kg(-1)) values of the direct glucose AEMFC. Secondly, investigate how a two-stage fuel cell system ...
Direct glucose anion exchange membrane fuel cell (AEMFC) with near-neutral-state electrolyte of 0.1 M [PO4] tot was studied with five different anode electrocatalysts (Pt, PtRu, PtNi, Au, PdAu) at a temperature of 37 oC and at a glucose concentration of 0.1 M. The cathode catalyst in each test was Pt supported on carbon (60 wt.%). Four anode electrocatalysts (supported on carbon) had a total metal content of 40 wt.% while the fifth anode material of PtRu had a higher content of 60 wt.%. Moreover, in order to show the influence of the metallic content on the fuel cell performance, anode catalysts with 60 wt.% (Pt) and 10wt.% (PtNi) were tested. The operation of the AEMFC was controlled by means of an in-house-made electronic load with PI-controller (i.e. a feedback controller that has proportional and integral action on control error signal) either at constant current (CC) or at constant voltage (CV). The primary objective was to characterize the Coulombic efficiency (CE) based on the exchange of ...
A catalyst consisting of palladium - nickel supported on exfoliated graphene oxide (PdNi/EGO) composite was synthesized. The catalytic activity was tested for ethanol oxidation reaction (EOR) in half-cell using cyclic voltammetry (CV) and subsequently it was used as an anode material in a direct ethanol fuel cell (DEFC). Transmission Electron Microscopy showed the catalyst particles are uniformly dispersed on the surface of graphene oxide with the particle size ranging from 3 to 6 nm. X-ray Photoelectron Spectroscopy analysis of catalysts revealed that the surface consisting of mostly Pd, PdO, Ni(OH)2, and NiOOH. CV and chronoamperometry measurements demonstrated higher electrocatalytic activity and stability for PdNi/EGO in the alkaline medium than the unsupported PdNi and carbon black-supported PdNi (PdNi/C) catalysts. A single cell anion exchange membrane DEFC constructed with a PdNi/EGO anode catalyst showed a maximum power density of 16.6 m Wcm−2 at 50 °C, which is higher than the ...
Volatile fatty acids (VFA) are building blocks for the chemical industry. Sustainable, biological production is constrained by production and recovery costs, including the need for intensive pH correction. Membrane electrolysis has been developed as an in situ extraction technology tailored to the direct recovery of VFA from fermentation while stabilizing acidogenesis without caustic addition. A current applied across an anion exchange membrane reduces the fermentation broth (catholyte, water reduction: H2O + e− → ½ H2 + OH−) and drives carboxylate ions into a clean, concentrated VFA stream (anolyte, water oxidation: H2O → 2e− + 2 H+ + O2). In this study, we fermented thin stillage to generate a mixed VFA extract without chemical pH control. Membrane electrolysis (0.1 A, 3.22 ± 0.60 V) extracted 28 ± 6 % of carboxylates generated per day (on a carbon basis) and completely replaced caustic control of pH, with no impact on the total carboxylate production amount or rate. Hydrogen generated
STUDY OF SPEEK-BASED PROTON EXCHANGE MEMBRANES FOR FUEL CELL APPLICATIONS.POMPES PAR TRANSITIONS MULTIPLES , STUDY OF SPEEK-BASED PROTON EXCHANGE MEMBRANES FOR FUEL CELL APPLICATIONS.POMPES PAR TRANSITIONS MUL... , کتابخانه دیجیتال دانشگاه آزاد اسلامی خوراسگان
TY - JOUR. T1 - Optimal design of baffles locations with interdigitated flow channels of a centimeter-scale proton exchange membrane fuel cell. AU - Jang, Jiin Yuh. AU - Cheng, Chin Hsiang. AU - Huang, Yu Xian. PY - 2010/1/1. Y1 - 2010/1/1. N2 - In the present study, the simplified conjugate-gradient method (SCGM) is combined with commercial CFD code to build an optimizer for designing the baffles locations with interdigitated channels of a centimeter-scale proton exchange membrane fuel cell (PEMFC). Using the optimizer, the locations of the baffles are adjusted toward the maximization of the average current density of the flow field. The approach is developed by using the commercial CFD code as the direct problem solver, which is able to provide the numerical solutions for the three-dimensional mass, momentum and species transport equations as well as to predict the electron conduction and proton migration taking place in a PEMFC. Results show that the optimal design process of the locations of ...
Bibliographic details on Pore-scale modeling of fluid flow through gas diffusion and catalyst layers for high temperature proton exchange membrane (HT-PEM) fuel cells.
Proton Exchange Membrane Fuel Cells (PEMFC) are promising energy converters, but still suffer from a short life duration. Applying Prognostics and Health M
Tang, H. and Pan, M. and Lu, S. and Lu, J. and Jiang, S.P. 2010. One-step synthesized HPW/meso-silica inorganic proton exchange membranes for fuel cells. Chemical Communications. 46: pp. 4351-4353 ...
In this paper, a fault tolerant control (FTC) strategy for proton exchange membrane (PEM) fuel cells based on the use of virtual actuators and the Takagi- Sugeno (TS) approach is proposed. The overall solution relies on adding a virtual actuator in the control loop to hide the fault from the controller point of view, allowing it to see the same plant as before the fault, such that the stability and some desired performances are preserved. The proposed methodology is based on the use of a reference model, where the resulting nonlinear error model is brought to a Takagi-Sugeno form using a gridding approach. The TS model is suitable for designing a controller using linear matrix inequalities (LMI)-based techniques, such that the resulting closed-loop error system is stable with poles placed in some desired region of the complex plane. Simulation results are used to show the effectiveness of the proposed approach ...
A professor at the University of California, Riverside has won a grant to study quaternary phosphonium-based hydroxide exchange membranes for use in next-generation fuel cells. The award is from the Department of Energys newly formed Advanced Research Projects Agency-Energy (ARPA-E), which funds transformative energy research projects.
The aim of this work was to develop a porous film structure for an electrode gas diffusion layer (GDL) used for proton exchange membrane fuel cells (PEMFCs). This film was made from a matrix composed of two immiscible polymers filled with a mixture of electrically conductive materials fabricated via a twin-screw extrusion process followed by selective extraction of one of the two polymers. The matrix consisted of low-viscosity polypropylene and polystyrene (PS) and the conductive additives were composed of high specific surface area carbon black and synthetic flake graphite. The conductive blends were first compounded in a corotating twin-screw extruder and subsequently extruded through a flexible film die to obtain a GDL film of around ...
A surface segregated bimetallic composition of the formula Ru.sub.1-xIr.sub.x wherein 0.1.ltoreq.x.ltoreq.0.75, wherein a surface of the material has an Ir concentration that is greater than an Ir concentration of the material as a whole is provided. The surface segregated material may be produced by a method including heating a bimetallic composition of the formula Ru.sub.1-xIr.sub.x, wherein 0.1.ltoreq.x.ltoreq.0.75, at a first temperature in a reducing environment, and heating the composition at a second temperature in an oxidizing environment. The surface segregated material may be utilized in electrochemical devices.
A detailed study of the D (a divinyl kenzene polymer substituted with sulfonic acid) and R (D membrane where a teflon polymer is substituted for the divinylbenzene) type ion exchange membranes for manpack fuel cells is presented. The critical current-voltage characteristics of both R and D type of ion exchange membrane electrolyte systems are examined for their capability of meeting the requirements for Army field use. Evaluation of the experimental results shows two main causes for fuel cell break down: (1) the presence of tetra hydrofuran in the fuel causing poisoning of the anode catalyst and eventual cell decay, and (2) ion exchange membrane dry-out due to low current loading and extended periods on open circuit voltage. (Author)(*FUEL CELLS
An alignment structure for a proton exchange membrane fuel cell is disclosed, which is used to accurately position a proton exchange membrane fuel cell onto a fuel cell manufacturing tool. The proton
A novel fluorinated cation exchange membrane containing carboxylic acid groups and sulfonic acid groups, both in the form of a specific pendant structure, the carboxylic acid groups being at least 20% on one surface of the membrane and gradually decreasing toward the innerside of the membrane, which membrane is useful in electrolysis of an aqueous alkali metal halide solution with advantageously stable performance for a long term under more severe operational conditions than those conventionally used. The membrane can be prepared from a novel copolymer of a fluorinated olefin with a novel sulfur containing fluorinated vinylether of the formula: ##STR1## wherein k is 0 or 1, l is an integer of 3 to 5, Z is --S-- or --SO2 -- and R is C1 -C10 alkyl, an aryl, C1 -C10 perfluoroalkyl.
Liquid water management is critical for Proton Exchange Membrane (PEM) fuel cell operation, as excessive humidity can lead to flooding and cell performance degradation. Water is produced in the cathode catalyst layer during the electrochemical reaction. If reactant gas streams become saturated, liquid water forms and must travel through anode and cathode Gas Diffusion Layers (GDLs) to reach flow channels for removal. Understanding the dynamic behavior of the droplet is critical to improve water removal strategies for PEM fuel cells. In this study a 3D, transient, two-phase model based on the Volume of Fluid (VOF) method was developed to study a single droplet in the gas channel. The formation, growth, and breakup of the droplet is tracked numerically and analyzed. The pressure drop across the droplet is monitored over time and compared with theoretical analysis. The droplet size and shape change over time for two different pore sizes are compared. The impact of various gases including air, ...
The Report Global PEMFC (Proton Exchange Membrane Fuel Cells) Market 2015-2019 provides information on pricing, market analysis, shares, forecast, and company profiles for key industry participants. - MarketResearchReports.biz. About PEMFC. PEMFC are devices that generate electricity through an electrochemical process involving oxidation of electrolytes placed between the anode and the cathode. Fuel cells are generally categorized based on the type of electrolyte used. PEMFC use an acidic water-based polymer membrane with platinum-based electrodes. It operates at low temperatures and caters effectively to dynamic power requirements. The chemical source of PEMFC, which is hydrogen, needs to be extremely pure because of its operating temperature and use of precious metal-based electrodes. PEMFC is a fuel-cell technology that is used extensively in light duty and material handling vehicles.. View Full Report at http://www.marketresearchreports.biz/analysis/280607. Technavios analysts forecast the ...
The Report Global PEMFC (Proton Exchange Membrane Fuel Cells) Market 2015-2019 provides information on pricing, market analysis, shares, forecast, and company profiles for key industry participants. - MarketResearchReports.biz About PEMFC PEMFC are devices that generate electricity through an electrochemical process involving oxidation of electrolytes placed between the anode and the cathode. Fuel cells are generally categorized based on the type of electrolyte used. PEMFC use an acidic water-based polymer membrane with platinum-based electrodes. It operates at low temperatures and caters effectively to dynamic power requirements. The chemical source of PEMFC,…. Read More ...
A pre-spiral bundle for making a spiral wrapped cylindrical fuel cell and cylindrical fuel cells made using the pre-spiral bundle. The pre-spiral bundle comprises a sleeve defining a hydrogen flowpath. The sleeve comprises a proton exchange membrane encapsulating a substantially planar anode in ionic communication with a catalytically effective amount of a noble metal
Proton exchange membrane fuel cells suffer from reversible performance loss during operation caused by the oxidation of the Pt catalyst which in turn reduces the electrochemically active surface area. Many fuel cell manufacturers recommend using short circuiting during the operation of the fuel cell to improve the performance of the cells over time. However, there is lack of understanding on how it improves the performance as well as on how to optimise the short circuiting strategy for different fuel cell systems. We present a simple procedure to develop an optimised short circuiting strategy by maximising the cumulative average power density gain and minimising the time required to recover the energy loss during short circuiting. We obtained average voltage improvement from 10 to 12% at different current densities for a commercial H-100 system and our short circuiting strategy showed ∼2% voltage improvement in comparison to a commercial strategy. We also demonstrated that the minimum short ...
Treatment of oil and gas (O&G) wastewater is a growing practice that increases water resources available for beneficial reuse. Electrodialysis (ED) is an established desalination process with the potential to remove ions from saline produced water (PW), a byproduct of O&G production. However, the current ED literature lacks studies that investigate the fate of organic contaminants during ED treatment using real PW. This work examines ion exchange membrane (IEM) fouling, system performance, and the transport of organic constituents through IEMs during ED treatment of real PW. A bench-scale ED ...
CO removal from a hydrogen-rich fuel gas for proton exchange membrane (PEM) fuel cell use = CO-Entfernung aus einem wasserstoffreichen Brenngas für eine PEM- ...
This work highlights the gains of an innovative model-based control approach applied to a proton exchange membrane fuel cell (PEMFC) system, included in a stand-alone hybrid generator. This approach proposes a multivariable setpoint tracking of the PEMFC output power and temperature. The freshness of this approach is based on the combination of a nonlinear model-based predictive control strategy (NMPC) and a global linearizing control (GLC) algorithm. The performance of the proposed control strategy is confirmed thanks to simulations of varying control scenarios. Results show good performance in setpoint tracking, disturbances rejection and robustness against plant/model mismatch in presence of noisy signals. Moreover, for similar setpoint point tracking accuracy, the proposed control strategy appears to be four times faster than a classical multivariable NMPC strategy. According to real-time application objectives, this control strategy appears as a promising option to be implanted in the overall
TY - JOUR. T1 - Improvement of the thermochemical water splitting IS process by an electrochemical cell using a cation exchange membrane. AU - Nomura, Mikihiro. AU - Okuda, Hiroyuki. AU - Kasahara, Seiji. AU - Kubo, Shinji. AU - Onuki, Kaoru. AU - Nakao, Shin-ichi. PY - 2004/6/27. Y1 - 2004/6/27. M3 - Article. JO - Proceedings of 15th World Hydrogen Energy Conference. JF - Proceedings of 15th World Hydrogen Energy Conference. ER - ...
Creating hydrogen technologies at scale is paramount to growing low-carbon solutions, said Amy Davis, Cummins Vice President and President of New Power, the companys alternative power business. We have successfully developed our technology from 1MW to 5MW, and now have the largest PEM electrolyzer in operation in the world. It will continue to take enterprises, governments, forward-thinking customers and utilities all working together to make alternative power a reality. Here we are seeing how green hydrogen can improve sustainability for industrial manufacturing and how the demand for decarbonized hydrogen solutions will grow. The HyLYZER(R) PEM electrolyzer technology is the result of more than 20 years of development by Hydrogenics, a Canadian company that was acquired by Cummins in September of 2019. This installation in Quebec features four compact pressurized electrolyzer skids that were fitted inside an existing building. This is a modular and scalable electrolyzer platform designed ...
The PEM (Proton Exchange Membrane) water electrolysers produce high purity hydrogen by electrochemical water splitting. The Major advantage of this technology is its dynamics, safety and simplicity of the whole pilot plant. The Anode where water is being split and cathode where hydrogen is evolved are isolated from each other by solid electrolyte what enables PEMWE (Proton Exchange Membrane Water Electrolysers) to electrochemically pressurize the gas up to 300bar.
The silanol groups on Silica gel surface are sites for adsorption of polar molecules. Alcohols and other polar molecules are easily adsorbed by forming hydrogen bondings with OH groups on silica gel surface. A study on the adsorption of methanol on silica gel was carried out by using NIR spectroscopy in combination with ssecond derivative techniques. Four of the well characterised silica gel samples were used in this study. Each of the silica gel (0.25g) samples with different surface areas and silanol number was pressed into a small disc, placed in a glass vial and the physically adsorbed water molecules from the surface of the silica gel particles were removed by heating the sample to 200 °C under vacuum. The near infrared spectra of the cooled sample was recorded by a Perkin Elmer spectrum one NIR spectrometer equipped with a transflectance accessory and a deuterated triglycine detector at a resolution of 16 cm-1. The glass vial was then opened and a tiny tube filled with methanol was ...
TY - JOUR. T1 - Impedance characterization of high temperature proton exchange membrane fuel cell stack under the influence of carbon monoxide and methanol vapor. AU - Jeppesen, Christian. AU - Polverino, Pierpaolo. AU - Andreasen, Søren Juhl. AU - Araya, Samuel Simon. AU - Sahlin, Simon Lennart. AU - Pianese, Cesare. AU - Kær, Søren Knudsen. PY - 2017/8. Y1 - 2017/8. N2 - This work presents a comprehensive mapping of electrochemical impedance measurements under the influence of CO and methanol vapor contamination of the anode gas in a high temperature proton exchange membrane fuel cell, at varying load current. Electrical equivalent circuit model parameters based on experimental evaluation of electrochemical impedance spectroscopy measurements were used to quantify the changes caused by different contamination levels. The changes are generally in good agreement with what is found in the literature. It is shown that an increased level of CO contamination resulted in an increase in the high ...
TY - JOUR. T1 - Liquid water flooding in a proton exchange membrane fuel cell cathode with an interdigitated design. AU - Kang, Simo. AU - Zhou, Biao. AU - Cheng, Chin-Hsiang. AU - Shiu, Huan Ruei. AU - Lee, Chun I.. PY - 2011/12/1. Y1 - 2011/12/1. N2 - In this paper, we studied the liquid water flooding process in the flow field of a proton exchange membrane fuel cell with an interdigitated design by using a multi-phase three-dimensional fuel cell cathode side model with a porous layer. The commercial CFD software package fluent (ANSYS Canonsburg, PA, USA) was used with a user-defined function. The results indicate that the general liquid water flooding process inside of this type of cathode design can be classified into three phases (the porous layer phase, the channel phase, and the drainage phase), and the details of liquid water behavior during this flooding process can be well understood and explained using the air-liquid interaction. Also, a liquid water avalanche phenomenon was ...
Ion Exchange Membrane Caustic Soda (CAS 1310-73-2) Market Research Report 2017 aims at providing comprehensive data on ion exchange membrane caustic
To achieve high temperature operation of proton exchange membrane fuel cells (PEMFC), preferably under ambient pressure, acid-base polymer membranes represent an effective approach. The phosphoric acid-doped polybenzimidazole membrane seems so far the most successful system in the field. It has in recent years motivated extensive research activities with great progress. This treatise is devoted to updating the development, covering polymer synthesis, membrane casting, physicochemical characterizations and fuel cell technologies. To optimize the membrane properties, high molecular weight polymers with synthetically modified or N-substituted structures have been synthesized. Techniques for membrane casting from organic solutions and directly from acid solutions have been developed. Ionic and covalent cross-linking as well as inorganic-organic composites has been explored. Membrane characterizations havebeenmadeincluding spectroscopy,wateruptake and acid doping, thermal and oxidative stability, ...
Proton Exchange Membrane Fuel Cell (PEMFC) uses hydrogen and oxygen for fuel, the whole energy conversion process almost has no negative impact on the environment. The PEM fuel cell stack with the advantages of low-operating temperature, high current density and fast start-up ability is considered to be the next generation of new electric vehicle power. However, due to the limited current output, it is difficult for a single cell to meet the practical application requirements. The actual fuel cell stack is formed by many single cells assembled together. The assembly process is often related to load transfer, material transfer, energy exchange, multi-phase flow, electrochemical reaction and other factors. The performance of MEA (Membrane Electrode Assembly), sealing gaskets and other components will change during the assembly process, which makes the fuel cell stack assembly process more complex. The assembly load of large stack and the inside interface pressure homogeneity significantly affect ...
In this article, one-phase and three dimensional computational fluid dynamics analysis was utilized to investigate the effect of annular field pattern of proton exchange membrane fuel cells (PEMFC) with different geometry on the performances and species distribution. This computational fluid dynamics code is used for solving the equation in single domain namely the flow field, the mass conservation, the energy conservation, the species transport, and the electric/ionic fields under the assumptions of steady state and non-isothermal. The introduced cell consist of different novelties, such as the way in which reactant gases are supplied to the flow field, the design of the flow field geometry for both anode and cathode and the membrane electrode assembly design and the length and occupied volume decreases up to 40%. Obtained results showed that generation of fuel cells with annular shaped geometry with the same active area and inlet area gave intensively higher current density compared with conventional
Catalyst support materials exhibit great influence on the performance and durability of proton exchange membrane (PEM) fuel cells. This minireview article summarises recent developments into carbon nanotube-based support materials for PEM fuel cells, including the membrane electrode assembly (MEA). The advan
Water electrolysis provides efficient and cost-effective production of hydrogen from renewable energy. Currently, the oxidation half-cell reaction relies on noble-metal catalysts, impeding widespread application. In order to adopt water electrolyzers as the main hydrogen production systems, it is critical to develop inexpensive and earth-abundant catalysts. This review discusses the proton exchange membrane (PEM) water electrolysis (WE) and the progress in replacing the noble-metal catalysts with earth-abundant ones. Researchers within this field are aiming to improve the efficiency and stability of earth-abundant catalysts (EACs), as well as to discover new ones. The latter is particularly important for the oxygen evolution reaction (OER) under acidic media, where the only stable and efficient catalysts are noble-metal oxides, such as IrOx and RuOx. On the other hand, there is significant progress on EACs for the hydrogen evolution reaction (HER) in acidic conditions, but how many of these EACs have
In the Experimental Section, paragraph 3, the fifth sentence should read: The scattering patterns were integrated to generate an I vs q curve, where I is the intensity of scattered X-rays and q is the scattering vector r, q is calculated from scattering angle θ and the wavelength of the X-ray beam λ by the equation q= 4πsin (θ)/λ. The remaining two sentences of that paragraph should be disregarded.. Figure 5 in the original manuscript should be replaced by the new version of Figure 5 shown below. Figure 5 in the published article is the relation between scattering intensity and the scattering angle, rather than q [calculated as q=4πsin (θ)/λ], due to an oversight by the author. The caption remains the same and is included for completeness.. The author apologises for these oversights. ...
Changes that carbon-supported platinum electrocatalysts undergo in a proton exchange membrane fuel cell environment were simulated by ex situ heat treatment of catalyst powder samples at 150 C and 100% relative humidity. In order to study modifications that are introduced to chemistry, morphology, and performance of electrocatalysts, XPS, HREELS and three-electrode rotating disk electrode experiments were performed. Before heat treatment, graphitic content varied by 20% among samples with different types of carbon supports, with distinct differences between bulk and surface compositions within each sample. Following the aging protocol, the bulk and surface chemistry of the samples were similar, with graphite content increasing or remaining constant and Pt-carbide decreasing for all samples. From the correlation of changes in chemical composition and losses in performance of the electrocatalysts, we conclude that relative distribution of Pt particles on graphitic and amorphous carbon is as important for
The produced liquid water in cathode catalyst layer (CCL) has significant effect on the operation of proton exchange membrane fuel cell (PEMFC). To investigate this effect, the transport of oxygen in CCL in the presence of immiscible liquid water is studied applying a two-dimensional pore scale model. The CCL was reconstructed as an agglomerated system. To explore the wettability effects, different contact angles were considered at the surface of agglomerates. The effective diffusivity of oxygen was calculated under different contact angles at various saturation levels. The same effective diffusivity was obtained for hydrophilic and hydrophobic domains at lower saturations, however, at saturation above 0.4, hydrophobic domain provided higher effective diffusivity values. The effect of water coverage at reaction surface areas was investigated. The results showed that, at the saturation of 0.4, the hydrophobic domain with the contact angle of 150 has about 2 times more available surface area, due to
The Global Proton Exchange Membrane Fuel Cells Industry 2015 Market Research Report is a professional - Market Research Reports and Industry Analysis
TABLE-US-00001 TABLE 1 Examples and Comparative Ex. examples 1 2 3 4 5 6 7 8 9 10 Polymerization scale 0.2 1.0 0.2 0.2 0.2 0.2 1.0 1.0 1.0 20.0 (L) Polymerization 1.20 1.22 0.97 1.05 1.05 1.05 1.18 1.12 1.18 1.09 pressure (MPa) Polymerization C6H C6H C6H C6H C4 C6 C6H C6H C6H C6H medium ethane ethane Type of monomer A B C B B B B B B B Addition of monomer All at Continuous Continuous All at All at All at Continuous Continuous Continuous Continuous once once once once TQ value (° C.) 247 252 208 244 201 191 242 230 -- 232 Ion exchange 0.86 0.94 0.97 0.93 0.92 0.95 0.99 1.04 0.95 1.02 capacity (meq/g dry resin) Anion diffusion -- 0.90 -- -- -- -- 1.47 2.83 -- -- coefficient (× 10-8 cm2/sec) Current efficiency -- -- -- -- -- -- -- -- -- 96.4 (%) after one week with usual salt solution Current efficiency -- -- -- -- -- -- -- -- -- 95.8 (%) after ten days with salt solution containing iodine and barium Examples and Comparative Comp. Ex. examples 1 2 3 4 5 Polymerization scale 1.0 1.0 2.5 2.5 2.5 ...
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FuMA-Tech is a leading company for functional membranes and plant technology and is a leading manufacturer of ion exchange membranes for different electrochemical operations. Their modern coating plant produces porous, non-porous and functional membranes with excellent resistance to acids, bases, solvents and oxidation.. ...
Hydrogen Burner Technology (HbT), Rancho Dominguez, Calif., has formed an alliance with Visteon Corp., Dearborn, Mich., to commercialize HbTs hydrogen fuel processors in proton exchange membrane (PEM) fuel-cell systems.
... dimethyl benzyl ammonium chloride (ADBAC),. These studies contradict the older toxicology data set on quaternary ammonia ... compounds which was reviewed by the U.S. Environmental Protection Agency (U.S. EPA) and the EU Commission. ...
... benzylammonium compounds MeSH D02.092.877.096.019 - ambenonium chloride MeSH D02.092.877.096.040 - benzalkonium compounds MeSH ... trialkyltin compounds MeSH D02.691.850.900.910 - triethyltin compounds MeSH D02.691.850.900.950 - trimethyltin compounds MeSH ... mustard compounds MeSH D02.455.526.728.468 - mustard gas MeSH D02.455.526.728.650 - nitrogen mustard compounds MeSH D02.455. ... trimethyl ammonium compounds MeSH D02.092.877.883.077 - betaine MeSH D02.092.877.883.088 - bethanechol compounds MeSH D02.092. ...
Quaternary ammonium compounds have also been shown to have antimicrobial activity. Certain quaternary ammonium compounds, ... The quat ingredients in the disinfectants include alkyl dimethyl benzyl ammonium chloride (ADBAC) and didecyl dimethyl ammonium ... Quaternary ammonium compounds are prepared by the alkylation of tertiary amines with a halocarbon. In older literature this is ... Quaternary ammonium compounds are cationic detergents, as well as disinfectants, and as such can be used to remove organic ...
... or aryl-substituted compounds ("quats"). Thus the product was originally called ammoniacal copper/quaternary ammonium. The ... red.pdf Reregistration Eligibility Decision for Alkyl Dimethyl Benzyl Ammonium Chloride (ADBAC)]". Report EPA739-R-06-009, US ... the water-soluble copper and the quaternary ammonium cations are immobilized by the formation of stable insoluble compounds ... of fastener materials corrosion in contact with timbers treated with copper azole and alkaline copper quaternary compounds". ...
The cation in this salt is called benzylammonium and is a moiety found in pharmaceuticals such as the anthelmintic agent ... Isoquinolines are a class of compounds (benzopyridines) which are used in medical contexts (such as the anesthetic ... Benzylamine is an organic chemical compound with the condensed structural formula C6H5CH2NH2 (sometimes abbreviated as PhCH2NH2 ...
Earlier formulations of Lysol contained cresol, a compound that can induce abortions, and it was widely used by women who could ... Products include: Lysol Disinfectant Spray*: "Alkyl (50% C14, 40% C12, 10% C16) Dimethyl Benzyl Ammonium Saccharinate= 0.10% ... August 2006). Reregistration Eligibility Decision for Alkyl Dimethyl Benzyl Ammonium Chloride (ADBAC) (PDF) (Report). U.S. ...
August 2006). Reregistration Eligibility Decision for Alkyl Dimethyl Benzyl Ammonium Chloride (ADBAC) (PDF) (Report). U.S. ... "https://pubchem.ncbi.nlm.nih.gov/compound/maitotoxin". External link in ,title= (help); Missing or empty ,url= (help) Topic 2 ...
The discovery of the avermectin family of compounds, from which ivermectin is chemically derived, was made by Satoshi Ōmura of ...
Alkyl Dimethyl Benzyl Ammonium Chloride [2] * Analytical Reagent [1] * Non Ferrous Metal separator [5] ... Rare Refractory Metals Compounds Ammonium niobium oxalate. Contact Supplier. Rare Refractory Metals Compounds Aluminum lithium ...
Alkyl Dimethyl Benzyl Ammonium Chloride, Analytical Reagent and Non Ferrous Metal separator. Rare Refractory Metals Compounds ...
Chemical Compound: Diethylene Glycol Butyl Ether; N-Alkyl Dimenthyl Benzyl Ammonium Chloride; N-Alkyl Dimethyl Ethylbenzyl ... Chemical Compound: Diethylene Glycol Butyl Ether; N-Alkyl Dimenthyl Benzyl Ammonium Chloride; N-Alkyl Dimethyl Ethylbenzyl ...
Quaternary ammonium compounds such as:. *alkyl dimethyl benzyl ammonium chloride. *alkyl dimethyl ethylbenzyl ammonium chloride ...
Alkyl Dimethyl Benzyl Ammonium Compounds. Benzalkonium chlorides. Alkyl Dimethyl Benzyl Ammonium Chlorides ... What appears on the label: Active Ingredients: Alkyl (50% C14, 40% C12, 10% C16) dimethyl benzyl ammonium chlorides...0.0216%, ... Alkyl (67% C12, 25% C14, 7% C16, 1% C-8-C10-C18) dimethyl benzyl ammonium chlorides...0.0860%; Other Ingredients...99.8924%; ...
Chemical Compound: Ethanol; Alkyl (50% C14, 40% C12, 10% C16) Dimethyl Benzyl Ammonium Saccharinate; Dirt Types: Bacteria; ... Chemical Compound: Ethanol; Alkyl (50% C14, 40% C12, 10% C16) Dimethyl Benzyl Ammonium Saccharinate; Dirt Types: Bacteria; ...
a) The additive contains the following compounds: n- dodecyl dimethyl benzyl ammonium chloride (CAS Reg. No. 139-07-1); n- ... 27479-28-3); n- hexadecyl dimethyl benzyl ammonium chloride (CAS Reg. No. 122-18-9); n- octadecyl dimethyl benzyl ammonium ... 1) Alone, in the following foods at not to exceed the levels prescribed, calculated as the anhydrous compound: Food Limitation ... 122-19-0); n- tetradecyl dimethyl benzyl ammonium chloride (CAS Reg. No. 139-08-2); n- tetradecyl dimethyl ethylbenzyl ammonium ...
Quaternary ammonium compounds, benzyl-C12-16-alkyldimethyl, chlorides*Quaternary ammonium compounds, benzyl-C12-C16- ... Alkyl (C12016) Dimethyl Benzyl Ammonium Chloride. Identifications. *CAS Number: 68424-85-1*Synonyms/Related:*Alkyl (C12016) ... Some chemicals listed in this database or not pure chemical compounds, rather they are mixtures/solutions of chemicals. It is ... Chemical Database - Alkyl (C12016) Dimethyl Benzyl Ammonium Chloride. EnvironmentalChemistry.com. 1995 - 2019. Accessed on-line ...
... dimethyl benzyl ammonium chloride , Paralkan , Parasterol , Quaternary ammonium compounds, alkylbenzyldimethyl, chlorides , ... N-Alkyl* dimethyl benzyl ammonium chloride *(57%C12, 18%C14, 8%C16, 6%C10-C18, 5%C8). View. View. View. Microbiocide. No. Not ... Quaternary ammonium compounds. View. View. View. Microbiocide. No. Not Listed. 68953-58-2. Related. 2. Quaternium-18 bentonite ... Tetradecyl dimethyl benzyl ammonium chloride. View. View. View. Algaecide, Microbiocide. Yes. Yes. Related. 2. Tetradecyl ...
... from www.PesticideInfo.org. ... Quaternary Ammonium Compound Use Type. Algaecide, Microbiocide Other Names for this Chemical. ... Identification and Use of Alkyl* dimethyl benzyl ammonium chloride *(67%C12, 25%C14, 7%C16, 1%C18). ... Additional Information for Alkyl* dimethyl benzyl ammonium chloride *(67%C12, 25%C14, 7%C16, 1%C18). ...
choline esters (compounds of formula (i) wherein R1 is ##STR6## alkyl and R2 R3 R4 are methyl). di-alkyl imidazolines compounds ... lauryl dimethyl benzyl ammonium chloride or bromide;. lauryl dimethyl (ethenoxy)4 ammonium chloride or bromide; ... break down a compound into two or more smaller compounds with the uptake of the H and OH parts of a water molecule on either ... To prepare these compounds, the alcohol or alkylpolyethoxy alcohol is formed first and then reacted with glucose, or a source ...
Chemical Compound. Ethanol; Alkyl (50% C14, 40% C12, 10% C16) Dimethyl Benzyl Ammonium Saccharinate ... Complies with the VOC (Volatile Organic Compound) limits, including California; Fully registered with the Federal EPA and each ...
Suitable detergent compounds for use herein are selected from the group consisting of the below described compounds. ... lauryl dimethyl benzyl ammonium chloride or bromide; lauryl dimethyl (ethenoxy)4 ammonium chloride or bromide; choline esters ( ... C11D1/00-Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent ... The compounds wherein T1 , T2, T3, T4, T§ represents the mixture of long chain materials typical for tallow are particularly ...
C11D1/00-Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent ... lauryl dimethyl benzyl ammonium chloride or bromide; lauryl dimethyl (ethenoxy)4 ammonium chloride or bromide; choline esters ( ... To prepare these compounds, the alcohol or alkylpolyethoxy alcohol is formed first and then reacted with glucose, or a source ... Preferred EDDS compounds are the free acid form and the sodium or magnesium salt thereof. Examples of such preferred sodium ...
146 contains 3% of alkyl C.sub.14 50%, C.sub.12 40%, C.sub.16 10% dimethyl benzyl ammonium chloride, 2.25% of octyl benzyl ... Still other solutions of blended quaternary ammonium compounds are available from Ecolab, Inc. of St. Paul, Minn. under the ... 4280Z (based on alkyl dimethyl benzyl ammonium chloride and/or alkyl dimethyl ethyl benzyl ammonium chloride); and BARQUAT.RTM ... MB-80 (based on alkyl dimethyl benzyl ammonium chloride); BARQUAT.RTM. MX-50 and BARQUAT.RTM. MX-80 (based on alkyl dimethyl ...
Suitable activators for peroxy compounds yielding H2 O2 in water are certain N-acyl or O-acyl compounds which form organic ... The standard used was the widening of the layer interval produced by the incorporation of cetyldimethyl benzylammonium ions. ... The detergent of claim 26, including a compound which yields H2 O2 in water, and a stabilizer for said compound. ... The detergent of claim 26, including a compound which yields H2 O2 in water, and an activator for said compound. ...
Together with C21H21NH+·Cl-, we suggest the formation of the tin(IV) compound, [(C6H5CH2)3NH][HPO4SnMe3]. Howver, we were not ... For related crystal structures containing the tri-benzyl-ammonium cation, see: Kozhomuratova et al. (2007. ); Jarvinen et al. ( ... organic compounds\(\def\hfill{\hskip 5em}\def\hfil{\hskip 3em}\def\eqno#1{\hfil {#1}}\). CRYSTALLOGRAPHIC. COMMUNICATIONS. ... Crystals of the title compound were obtained by reacting [(C6H5CH2)3NH]2[HPO4] (0.300 g, 0.446 mmol), previously synthesized ...
They are the quaternary ammonium compounds ADBAC (n-alkyl dimethyl benzyl ammonium chloride) and DDAC (didecyl dimethyl ... This group of compounds acts on the cell membrane, and does a fantastic job of killing everything. But, you know, were ...
This complex compound was separated from solution by means of filtration and found to contain about 63% stearylkonium cation. ... A Stearyl dimethyl benzyl ammonium Heparin complex was prepared as follows: 27 grams of heparin was dissolved in 215 ... In summary, the results of Example 4, as demonstrated by the data in table 5 indicates that alkyl benzyl ammonium/heparin ... The solution was mixed with a 420 milliliter of a water solution containing 63 grams of purified Stearyl dimethyl benzyl ammonium ...
Component: Parts by weight Oleyl dimethyl benzyl ammonium chloride (at 50% active) 10 Block copolymer compound A 2 Perfume 0.2 ... linoleyl dimethyl benzyl ammonium chloride, liuolenyl dimethyl benzyl ammonium chloride, myristyl dimethyl benzyl ammonium ... which appears to be an oleyl dimethyl benzyl ammonium chloride. Also suitable for use are myristoleyl dimethyl benzyl ammonium ... hereinafter referred to as compound B), wherein Me is -CH and Bu is -C H and a cationic quaternary ammonium halide in critical ...
Quaternary ammonium biocides: are nitrogenated cationic compounds like alkyl dimethyl benzyl ammonium chlorides and dialkyl ... anyway other compounds may be useful (Robertson et al.it/biocides/. true resistance.4 Biocide control of slime formation The ... reducing sulphates compounds to S(II) using the hydrogen for producing H2S and also depolarizes the cathode because of absorbed ... Bromide organic compounds: this group includes the dibromo-nitrilo-propionamide (DBNPA) that has a large range for bacteria ...
DISINFECTANT TYPE: quaternary compounds. pH: 12.75. ACTIVE INGREDIENTS. Octyl decyl dimethyl ammonium chloride (1.65%); Dioctyl ... dimethyl benzyl ammonium chloride (2.20%). Please review label and SDS on stateindustrial.com for all product directions, ...
Alkyl dimethyl benzyl ammonium chlorides (C12-16). Alkyl dimethyl benzyl ammonium chloride (C14 60%, C16 30%, C12 5%, C18 5%). ... THE FACTS: Plastic products can contain toxic additives such as phthalates, heavy metals and other compounds which leach out ... Avoid antibacterial handsoaps, hand sanitizers and cleaning products which contain quaternary ammonium compounds (quats). Check ...
"Quats, or quarternary ammonium compounds, are potent disinfectant chemicals commonly found in many disinfectant sprays, wipes, ... Clorox Disinfecting Wipes, for instance, contain Alkyl dimethyl benzyl ammonium chloride, which is a Quat. ...
Alkyl Dimethyl Benzyl, Ammonium Chlorides C12-16) - Graded "F" because of general systemic, organ and respiratory effects. ... Silicon Compounds - Graded "F" because of developmental, endocrine, reproductive effects as well as biodegradation and chronic ...
Chemical Compound. Alkyl (50% C14, 40% C12, 10% C16) Dimethyl Benzyl Ammonium Saccharinate, Ethanol. ... Compliant with TSCA regulations, Complies with the VOC (Volatile Organic Compound) limits, including California, Fully ...
Chemical Compound. Alkyl (50% C14, 40% C12, 10% C16) Dimethyl Benzyl Ammonium Saccharinate, Ethanol. ... Compliant with TSCA regulations, Complies with California Proposition 65, Complies with the VOC (Volatile Organic Compound) ...
Chemical Compound: Alkyl (50% C14, 40% C12, 10% C16) Dimethyl Benzyl Ammonium Chloride; Octyl Decyl Dimethyl Ammonium Chloride ...
EMAIL INQUIRY to 1 to 30 of 47 Dodecyl Dimethyl Benzyl Ammonium Chloride (CAS No. 139-07-1) suppliers Page: [1] 2 ... Most of our compounds can be supplied ran more... N-[(S)-1-Carbethoxy-1-butyl]-(S)-alanine , 4-Aminophenol , 5-Methylnicotinic ... Dodecyl Dimethyl Benzyl Ammonium Chloride (CAS No. 139-07-1) Suppliers. Limit companies to: Worldwide USA China India ... BOC Sciences provides a wide range of Customer Services, Bulk & Specialty Compounds to the Pharmaceutical, Agrochemical and ...
Some of the chemical names of quaternary ammonium compounds used in healthcare are alkyl dimethyl benzyl ammonium chloride, ... Quaternary Ammonium Compounds. Overview.. The quaternary ammonium compounds are widely used as disinfectants. Health-care- ... Each compound exhibits its own antimicrobial characteristics, hence the search for one compound with outstanding antimicrobial ... Chlorine and Chlorine Compounds. Overview.. Hypochlorites, the most widely used of the chlorine disinfectants, are available as ...
  • In this study, we systematically evaluated the antibiofouling behavior of quaternary ammonium compound (QAC) blended polyvinylidene fluoride (PVDF) membrane using quartz crystal microbalance with dissipation monitoring (QCM-D) combined with flow cytometry (FCM) and confocal laser scanning microscopy (CLSM) measurements. (iwaponline.com)
  • Sodium hypochlorite, accelerated hydrogen peroxide (AHP) and a quaternary ammonium compound (QUAT) were assessed. (ubc.ca)
  • The opposition division held that the specific combination of substituents of the quaternary ammonium compound as stipulated in claim 1 was not disclosed, neither in D1 nor in any of the other citations. (epo.org)
  • Claim 1 stipulated organic substituents for the quaternary ammonium compound which were merely a selection of most of what remained from the list of substituents disclosed in D1, avoiding the selection already made for the known examples. (epo.org)
  • Note: High doses of quaternary ammonium compound may combine with free chlorine, resulting in excess levels of combined chlorine. (lochlor.com.au)
  • They are the quaternary ammonium compounds ADBAC (n-alkyl dimethyl benzyl ammonium chloride) and DDAC (didecyl dimethyl ammonium chloride). (seattlepi.com)
  • Offering you a complete choice of products which include Sodium Polyacrylate (Atoopol WS 38), Quarternary Ammonium Compound (Benzyl Konium Chloride), EDTA Sodium Salts, Catonic Active Surfactant, EDTA Tetrasodium Salt and Benzyl Konium Chloride. (indiamart.com)
  • The products contained an amine, two quaternary ammonium compounds (n-alkyl dimethyl benzyl ammonium chloride and didecyl dimethyl ammonium chloride) and two phenolic compounds. (cdc.gov)
  • Benzalkonium chloride (alkyl dimethyl benzyl ammonium chloride) is an organic compound that is used as an antiseptic and spermicide. (theaquariumwiki.com)
  • Benzalkonium chloride is a weak allergen but is highly toxic in large amounts and over time (compounding or long-term exposure). (naturalpedia.com)
  • Application: Laundry Sanitizer\u003cbr\u003e Applicable Material: Fabric\u003cbr\u003e Chemical Compound: Dicapryl\/Dicaprylyl Dimonium Chloride\u003cbr\u003e n-Alkyl (C14 50%, C12 40%, C16 10%) dimethyl benzyl ammonium chloride\u003cbr\u003e Dirt Types: Klebsiella Pneumoniae\u003cbr\u003e Staphylococcus Aureus. (d2distributors.com)
  • Application: Dairy Processing Equipment\u003cbr\u003e Food Processing Equipment\u003cbr\u003e Public Eating Places\u003cbr\u003e Utensils\u003cbr\u003e Chemical Compound: Alkyl Dimethyl Ethyl Benzyl Ammonium Chloride\u003cbr\u003e Scent: Quaternary\u003cbr\u003e Physical Form: Liquid. (qualityucanafford.com)
  • Benzalkonium chlorides (BACs), also known as alkyl dimethyl benzyl ammonium chlorides, alkyl dimethyl (phenylmethyl) quaternary ammonium chlorides, ammonium alkyl dimethyl (phenylmethyl) chlorides, or ammonium alkyl dimethyl benzyl chlorides, are a class of quaternary ammonium compounds (QACs) ( Fig. 1A ). (asm.org)
  • Dimethyl benzyl amine is a ionic compound? (org.in)
  • In this article, we provide further information about the N,N-dimethyl-N-tetradecyl-N-benzylammonium structure of this determinant for ISR and show that the benzylamine moiety may be important for perception of the molecule by root cells of different plant species. (uliege.be)
  • The active ingredients can be things like alkyl dimethyl benzyl ammonium chlorides, quaternary ammonium compounds, benzyl-c8-18-alkyldimethyl, ethanolamines, and a few other very long compound names. (cleansthenewblack.com)
  • Avoid antibacterial handsoaps, hand sanitizers and cleaning products which contain quaternary ammonium compounds (quats). (womensvoices.org)
  • Provides comprehensive data for each element of the periodic table of elements including up to 40 properties, names in 10 languages and common chemical compounds. (environmentalchemistry.com)
  • Some chemicals listed in this database or not pure chemical compounds, rather they are mixtures/solutions of chemicals. (environmentalchemistry.com)
  • In the healthcare setting, "alcohol" refers to two water-soluble chemical compounds-ethyl alcohol and isopropyl alcohol-that have generally underrated germicidal characteristics 482 . (cdc.gov)
  • IUPAC nomenclature is a system of naming chemical compounds and of describing the science of chemistry in general. (statemaster.com)
  • CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. (statemaster.com)
  • The offered drops are formulated using high quality chemical compounds that are procured from the most trustworthy and reliable vendors of the market. (protonpharma.in)
  • Amine is a group of basic organic compounds derived from ammonia (NH 3) by replacement of one (primary amines), two (secondary amines), or three (tertiary amines) hydrogen atoms by alkyl, aryl groups or organic radicals. (org.in)
  • These studies contradict the older toxicology data set on quaternary ammonia compounds which was reviewed by the U.S. Environmental Protection Agency (U.S. EPA) and the EU Commission. (wikipedia.org)
  • As the compound suggests this blend contains ammonia. (lochlor.com.au)
  • Alcohols - Compounds that contain one or more hydroxyl group. (homeis.co.uk)
  • Duty disinfectant ammonium compound with a pronounced effect against bacteria, fungi, algae, mycoplasma and big fours. (heka-incubators.co.uk)
  • Lysol is a VOC (Volatile Organic Compound) that h as been shown to lower IQ in children developmentally. (sarahbarendse.com)
  • The quaternary ammonium salt bactericide has the property of an ionic compound, which is highly soluble in water and is insoluble in a non-polar solvent, with stable Chemical properties. (blamine.com)
  • According to the latest science, volatile organic compounds (VOCs) coming from inside your home are worse for the environment than car fumes. (mamavation.com)
  • The volatile organic compounds (VOCs) emitting from common cleaning products in your home evaporate into the air. (mamavation.com)
  • The first, also known as oxidation dyeing, uses "oxidation" dye precursors, which are colorless or weakly colored compounds. (google.com)
  • Ethanol, also known as ethyl alcohol, drinking alcohol or grain alcohol, is a flammable, colorless, slightly toxic chemical compound, and is best known as the alcohol found in alcoholic beverages. (statemaster.com)
  • Germ protection - ethanol quaternary ammonium compounds. (iceland.co.uk)
  • Once mixed with oxidizing products, at the time of use, these precursors lead to colored compounds and dyes via a process of oxidative condensation. (google.com)
  • The second, also known as direct dyeing, uses direct dyes, which are nonionic or ionic dyes and colored compounds capable of producing a more or less pronounced change of the natural color of the hair, resistant to shampoo-washing several times. (google.com)
  • However, when employed in toothpastes which include a compound which provides fluorine such as sodium fluoride or sodium monofluorophosphate they generally are incompatible with the unlined surface of an aluminum dentifrice container, in particular causing the swelling and formation of gas on the tube wall and also corroding the wall itself. (google.com)
  • Numerous proposals have been made in the past to provide disinfectant compositions for killing or controlling microorganisms which involved the complexing of iodine with various compounds which have the property of liberating the iodine for itsdisinfecting properties under conditions of use. (patentgenius.com)
  • Activity enhanced by Iodine and Quaternary ammonium compounds. (cram.com)
  • The process involves contacting the hair fibers with a composition containing at least one polyamine compound having at least two amino groups and at least one anionic silicone. (google.com)
  • An optical film is also provided with excellent liquid crystal orientation retention properties and mechanical strength, produced by aligning a composition of the dioxetane compound and a cationically polymerizable compound in a liquid crystal orientation and fixing the liquid crystal orientation by polymerization. (google.com.au)
  • The present invention provides a compound and a pigment dispersant, each of which improves the dispersibility of various types of pigments in a non-aqueous solvent and also provides a pigment composition, a pigment dispersion, and a toner, each of which has a preferable coloring power. (patents.com)
  • When the compound obtained by the reaction contains a substituent convertible into an amino group, such sub stituent is subsequently converted into an amino group. (docme.ru)
  • Thus, a hydroxyl group may ?rst be exchanged for a This invention relates to 2-(A1'-cycloalkenyl)-2-amino alkyl-cycloalkanones and 2-cycloalkyl-2-aminoalkyl-cyclo 10 halogen atom and then the resulting halogen-compound alkanones. (docme.ru)
  • Plastic products can contain toxic additives such as phthalates, heavy metals and other compounds which leach out over time. (womensvoices.org)
  • and a compound having a cationically polymerizable group, excluding the compound represented by formula (1). (google.com.au)
  • Dimethylbenzylamine is the organic compound with the formula C 6 H 5 CH 2 N(CH 3) 2. (org.in)
  • R170 Ethane C2H6 Organic Gases Methylmethane Chemical Compound Description: Organic Gases Ethane is an organic chemical compound with chemical formula C2H6. (qualitytoyschina.com)
  • ethene ) is the chemical compound with the formula C2H4. (qualitytoyschina.com)
  • Both elements combine easily, making the compound practical to use as a fertilizer. (ehow.com)
  • Our analysis suggests that the ubiquitous and frequent use of BACs in commercial products can generate selective environments that favor microbial phenotypes potentially cross-resistant to a variety of compounds. (asm.org)
  • The cleaning products that induced a positive SIC contained quaternary ammonium compounds (n=10), glutaraldehyde (n=3), both of these agents (n=1) and ethanolamines (n=2). (bmj.com)
  • Formation potential tests revealed that even under strong nitrosation conditions, polyDADEPC and related lower-order P-based compounds formed oxygenated and not nitrosated products. (reedforiowa.com)
  • They are usually commercialized as a mixture of compounds with different lengths for the alkyl chain, ranging from C 8 to C 18 , with higher biocide activity for C 12 and C 14 derivatives ( 1 ). (asm.org)
  • This group of compounds acts on the cell membrane, and does a fantastic job of killing everything. (seattlepi.com)
  • The compound includes a polymer which has a monomer unit having a specific structure and also includes a specific partial structure. (patents.com)
  • Acid - A compound that ironises in water to produce hydrogen irons - used in toilet cleaners, rust removers and hard water stain removers. (homeis.co.uk)
  • The results also suggest that quaternary ammonium compounds are the principal cause of sensitiser-induced occupational asthma among cleaners. (bmj.com)
  • The specific involvement of the N-alkylated benzylamine derivative (NABD) in ISR elicitation was first evidenced by testing the purified compound that mimicked the protective effect afforded by crude supernatant samples. (uliege.be)
  • H, crystallizing from hot water in needles which when impure possess a nauseous smell, that of the pure compound being much less unpleasant. (ebooksread.com)
  • Since the compounds as stipulated in claim 1 were new and solved the stated technical problem, they were held to involve an inventive step. (epo.org)
  • Reviews and discussions are welcomed that address legal and/or regulatory decisions with respect to risk assessment and management of toxicological and pharmacological compounds on a scientific basis. (elsevier.com)
  • Ill the base prepared from benzonitril into scientific literature as a new compound and to denote it by a new name. (ebooksread.com)