• Parallels exist with the production of phthalic anhydride: While older methods use naphthalene, modern methods use o-xylene as feedstock. (wikipedia.org)
  • The expected development should be transferable to other selective oxidation reactions such as the production of phthalic anhydride and acrylonitrile. (europa.eu)
  • The fuel contained pulverized phthalic anhydride and anhydrous maleic anhydride, two substances that have been documented as linked to asthma. (concentra.com)
  • Alkyd resins based on Jatropha curcas oil with different molar ratios of phthalic anhydride (PA) and maleic anhydride (MA) were prepared by alcoholysis followed by polyesterifi cation reaction. (techscience.com)
  • From the various properties of the blends it was observed that the blend with 100% phthalic anhydride has the best performance characteristics and is the most effi cient. (techscience.com)
  • Long oil length alkyd resins were synthesised by two-stage alcoholysis-polyesterification reaction with variation of phthalic anhydride (PA) and maleic anhydride (MAH) proportion and further polymerised with methyl methacrylate (MMA) and butyl acrylate (BA) via miniemulsion polymerisation. (european-coatings.com)
  • Make 1 part of 57% styrene solution (containing 44 parts of 3 I 1 I 45 parts of maleic anhydride-phthalic anhydride-1. (sinocurechem.com)
  • Traditionally maleic anhydride was produced by the oxidation of benzene or other aromatic compounds. (wikipedia.org)
  • In addition, in the production of maleic anhydride (4 C-atoms) a third of the original carbon atoms is lost as carbon dioxide when using benzene (6 carbon atoms). (wikipedia.org)
  • Maleic Anhydride prices fell as the feedstock prices benzene dropped because of low crude oil prices. (chemanalyst.com)
  • Photo-oxidation products from the reaction of a series of alkyl-benzenes, (benzene, toluene, p -xylene and 1,3,5-trimethyl-benzene) with hydroxyl radicals in the presence of NO x have been investigated using comprehensive gas chromatography (GCxGC). (copernicus.org)
  • Diels-Alder reaction of maleic anhydride and butadiene and isoprene gives the respective tetrahydrophthalic anhydrides which can be hydrogenated to the corresponding hexahydrophthalic anhydrides. (wikipedia.org)
  • Maleic Anhydride is also a critical ingredient in the production of 1:4 butanediol and tetrahydrophthalic anhydrides (curing agents). (chemanalyst.com)
  • Among the most widely employed dienophiles are maleic anhydride and closely related dicarboxylic acid derivatives. (organicreactions.org)
  • It is the acid anhydride of maleic acid. (wikipedia.org)
  • It hydrolyzes, producing maleic acid, cis-HOOC-CH=CH-COOH. (wikipedia.org)
  • The food industry uses malic acid which is derivative of maleic anhydride in artificial sweeteners and flavour enhancements. (wikipedia.org)
  • The progress of the reaction was traced by the determination of acid value at regular time intervals. (techscience.com)
  • Maleic Anhydride turns into maleic acid when it mixes with water. (chemanalyst.com)
  • 8. Which of the following acid can be used as a catalyst in Friedel Craft's reactions? (com.pk)
  • Selective oxidation reactions (maleic anhydride, acrylic acid). (legendkings.com)
  • Kundig, E. P. Chiral Ruthenium Acid Catalyzed Intramolecular Diels-Alder Reactions. (stackexchange.com)
  • Phthalic acid anhydrides. (lookformedical.com)
  • Then in toluene solvent with 92 parts of terephthalic acid, 15 parts of isophthalic acid, 5 parts of glycolic acid, 8 parts of maleic anhydride, 30 parts of ethylene glycol, 100 parts of neonjonediol and 5 parts of trimethylolpropane to make high solids acrylic resin coating. (sinocurechem.com)
  • The present invention relates to a process for in situ the preparation of mixtures of chelating agents by catalyzed reactions of diethanolamine derivatives with maleic acid and then with 2-halocarboxylic acid, to mixtures of chelating agents and methods using such chelating agents. (justia.com)
  • These derivatives can be prepared by reacting di- or triethanolamine with an alkali metal or alkaline earth metal salt of maleic acid in the presence of a catalyst such as lanthanoid compounds, a nickel compound or alkaline earth metal compounds, e.g. calcium hydroxide or magnesium hydroxide. (justia.com)
  • According to the present invention it was surprisingly found that the free hydroxyl groups of bis-(2-hydroxyethyl)glycine or bis-(2-hydroxyethyl)methyl glycine, or salts thereof can easily and effectively be converted into other reactive ingredients by the addition of a maleate into the reaction containing a lanthanoid catalyst to yield an amino acid derivative substituted with succinic acid groups. (justia.com)
  • It has now been surprisingly found that mixtures of chelating agents having a diethanol amine backbone can be effectively prepared by lanthanoid-catalysed reaction of bis-(2-hydroxyethyl)glycine or bis-(2-hydroxyethyl)methyl glycine, or salts thereof with a maleate followed by a subsequent lanthanide-catalyzed reaction with a 2-halocarboxylic acid. (justia.com)
  • Maleic anhydride is produced by vapor-phase oxidation of n-butane. (wikipedia.org)
  • Use of porous membranes for partial oxidation reactions. (legendkings.com)
  • These results provide strong inspiration to design molecularly defined heterogeneous catalysts for selective oxidation reactions, and the key to realizing this idea is the development of a method to synthesize molecularly defined heterogeneous catalytic materials. (nature.com)
  • The chemistry of maleic anhydride is very rich, reflecting its ready availability and bifunctional reactivity. (wikipedia.org)
  • Maleic Anhydride is a chemically reactive intermediate with applications in almost every field of applied chemistry. (chemanalyst.com)
  • Maleic Anhydride is a highly reactive chemical intermediate with present and potential uses in practically every field of industrial chemistry. (sharjahchemical.com)
  • In a second part, azido-functionalized polystyrene copolymers were used to prepare a new protein-polymer bioconjugate by copper-free click chemistry reaction. (ibmmpolymerbiomaterials.com)
  • For toluene reactions, observed oxygenated intermediates found included the co-eluting pair a -angelicalactone/4-oxo-2-pentenal, maleic anhydride, citraconic anhydride, benzaldehyde and p -methyl benzoquinone. (copernicus.org)
  • Currently, 1,4-BDO is produced by several petrochemical routes: hydrogenation of maleic anhydride, isomerization of propylene oxide, acetoxylation of butadiene, and the reaction of formaldehyde and acetylene. (welinkschem.com)
  • Michael reaction of maleic anhydride with active methylene or methine compounds such as malonate or acetoacetate esters in the presence of sodium acetate catalyst. (wikipedia.org)
  • In this work, we developed a rapid method for the preparation of starch esters by increasing reaction efficiency and decreasing the reaction time. (usda.gov)
  • It is the aim of this research programme to develop a reactor based on ceramic membranes where the reaction between butane and air/oxygen takes place either on a catalyst within the membrane tube or at a catalytic surface created within the membrane wall. (europa.eu)
  • Analysis of Steady-state and Forced Periodic Operation of Electrochemical Membrane Reactors for Selective Partial Oxidation of n-Butane to Maleic Anhydride. (mpg.de)
  • The new report presents a feasibility analysis of Maleic Anhydride production from n-butane in the USA using a process similar to the one developed by Huntsman. (newswire.com)
  • The Diels-Alder reaction consists in an addition of a compound containing a double or triple bond (usually activated by additional unsaturation in the alpha, beta-position) to the 1,4-positions of a conjugated dienes system with the formation of a six-membered ring, Various dienes systems to dienophiles are described as typical examples of the Diels-Alder reaction. (organicreactions.org)
  • Maleic anhydride is a classic substrate for Diels-Alder reactions. (wikipedia.org)
  • If you have access to the literature, research papers by Herbert House or William Roush [1] on this type of Diels-Alder reaction. (stackexchange.com)
  • Peseckis, S. M. Intramolecular Diels-Alder reactions: the angularly methylated trans-perhydroindan ring system. (stackexchange.com)
  • Used in copolymerization reactions, in the Diels-Alder(diene)synthesis, in the preparation of resins, pharmaceuticals and agricultural chemicals. (lookformedical.com)
  • A noteworthy feature of this reaction is the great variety of compounds that may serve as the dienophile. (organicreactions.org)
  • The demand for maleic Anhydride in the APAC region is anticipated to rise owing to its usage for creating bulk molding compounds and fiberglass reinforced plastics. (chemanalyst.com)
  • These polymaleimide derivatives can be active catalysts for the selective oxidation of heterocyclic compounds to quinoline and indole via the recycling of -C=O and -C-OH groups, which was confirmed by tracing the reaction with GC-MS using maleimide as the catalyst and by FT-IR analysis with polymaleimide as the catalyst. (nature.com)
  • Maleic anhydride is also a precursor to compounds used for water treatment detergents, insecticides and fungicides, pharmaceuticals, and other copolymers. (sharjahchemical.com)
  • The reaction of amino compounds with maleic anhydride was found to be a highly efficient, a versatile, and a facile chemical ligation reaction for the synthesis of macromolecules with quantitative yield under mild conditions. (ibmmpolymerbiomaterials.com)
  • A number of carbonyl-type compounds were identified during a series of reactions carried out at the European Photoreactor (EUPHORE), a large volume outdoor reaction chamber in Valencia, Spain. (copernicus.org)
  • Influences of the reaction time volume of EG and catalysts concentrations on the yield of theglycolysis products were investigated. (4spe.org)
  • In this study wehad three 3-level factors for reaction time volume ofEG and catalysts concentrations on the basis ofTaguchi's statistical method. (4spe.org)
  • Develop various selective C-C coupling reaction chemistries via a slate of catalysts to build the carbon chain length starting from furans and long-chain functionalized molecules, such as fatty acids or their derivatives. (udel.edu)
  • As single-active site catalysts, homogeneous catalysts have the advantage of being well defined on a molecular level and readily soluble in the reaction medium. (nature.com)
  • Among the above transformations, active sites on the carbon catalysts toward selective oxidation or catalytic reduction include -C-OH and -C=O. The oxidation or reduction reactions can be realized via the recycling of the -C-OH and -C=O groups. (nature.com)
  • This compound is formed by direct reaction between castor oil and maleic anhydride, which can be accelerated using free radical catalysts. (scielo.org)
  • In this study, maleic anhydride grafted polypropylene microporous flat-sheet membranes were prepared via a thermally induced phase separation method with a mixture of dibutyl phthalate and dioctyl phthalate as a diluent. (sharif.edu)
  • The findings indicated that an increase in the surface energy of polypropylene by grafting maleic anhydride would result in higher bonding strength due to chemical interaction between the AA5052 and the maleic anhydride grafted polypropylene (PP-g-MAH). (sharif.edu)
  • It was used for work in 1928, on the reaction between maleic anhydride and 1,3-butadiene, for which Otto Paul Hermann Diels and Kurt Alder were awarded the Nobel Prize in 1950. (wikipedia.org)
  • Succinic anhydride/starch gave DS of 0.3 as compared to only 0.1 with maleic anhydride/starch. (usda.gov)
  • Thermoplastic starch was premixed with sericin (TPSS) by solution mixing and then melt-blended with polyethylene grafted maleic anhydride (PEMAH). (cmu.ac.th)
  • The TPS/PEMAH morphology presented polyethylene grafted maleic anhydride particles (2 μm) dispersed in the thermoplastic starch matrix, which decreased in size to approximately 200 nm when 5% sericin was used. (cmu.ac.th)
  • This reaction reduced the interfacial tension between thermoplastic starch and polyethylene grafted maleic anhydride, which improved the compatibility, mechanical properties, and morphology of the blend. (cmu.ac.th)
  • In this article, poly(styrene-alt-maleic anhydride) copolymers were first prepared by RAFT polymerization and characterized by different analytical techniques. (ibmmpolymerbiomaterials.com)
  • The top players in the global Maleic Anhydride market in H1 2023 were BASF, Huntsman Corporation, and Sasol-Huntsman GmbH & Co. In February 2023, MAN Energy Solutions successfully shipped salt-powered reactor systems to Wanhua Chemicals Group Co., Ltd., one of the prominent chemical manufacturers based in China for their upcoming new maleic anhydride plant. (chemanalyst.com)
  • In H1 2023, Asia Pacific was the largest consumer of maleic anhydride. (chemanalyst.com)
  • In the beginning of 2023, due to supply chain disruptions and low production in Asia, the Maleic Anhydride prices hiked in the region. (chemanalyst.com)
  • However, the prices of maleic anhydride fell in March 2023. (chemanalyst.com)
  • Markets dynamics of Maleic Anhydride remained bearish till June 2023. (chemanalyst.com)
  • Valorization of biomass derivatives (bioethanol, acetone, furfural, carboxylic acids) through carbon-carbon bond formation reactions (aldol, decarboxylate condensations). (legendkings.com)
  • The selectivity of the process reflects the robustness of maleic anhydride, with its conjugated double-bond system. (wikipedia.org)
  • The explosive properties study is waived for Fatty acids, tall oil, oligomeric reaction products with maleic anhydride and rosin, calcium magnesium zinc salts as the screening procedure determined that there are no chemical groups present in the molecule associated with explosive properties and the calculated oxygen balance is less than -200. (europa.eu)
  • Based on the screening procedure (Chilworth Technology, 2010a), the chemical structures of Fatty acids, tall oil, oligomeric reaction products with maleic anhydride and rosin, calcium magnesium zinc salts do not contain any functional groups associated with explosive or self-reactive properties. (europa.eu)
  • The screening assessment indicates that Fatty acids, tall oil, oligomeric reaction products with maleic anhydride and rosin, calcium magnesium zinc salts is not classified as explosive. (europa.eu)
  • Houston, July 1, 2016 (Newswire.com) - Intratec Solutions LLC, the leading source for chemical markets data and production cost reports, is pleased to announce a new report examining the costs of production of Maleic Anhydride. (newswire.com)
  • Finally, pulsed plasma polymerization of maleic anhydride took this approach one stage further, by forming well-adhered polymer films containing a predetermined concentration of reactive anhydride groups. (dur.ac.uk)
  • Improvement of the performance of reactions of industrial interest through the use of membrane reactors (inert or reactive): Use of membranes selective for hydrogen permeation for reforming and water gas displacement (WGS) reactions. (legendkings.com)
  • Around 50% of world maleic anhydride output is used in the manufacture of unsaturated polyester resins (UPR). (wikipedia.org)
  • Maleic anhydride is an important intermediary in the manufacture of unsaturated polyester resins and the production increases by several per cent annually. (europa.eu)
  • Maleic anhydride is used in the production of unsaturated polyester resin as well as in the manufacture of coatings, pharmaceutics, agricultural products, surfactants, and as an additive of plastics. (sharjahchemical.com)
  • Fourier-transform infrared spectroscopy confirmed the reaction between the amino groups of sericin and the maleic anhydride groups of polyethylene grafted maleic anhydride. (cmu.ac.th)
  • Then, the poly(styrene-alt-maleic anhydride) precursors were functionalized with primary amine such as azidopropylamine and amino poly(ethylene glycol). (ibmmpolymerbiomaterials.com)
  • The effects of varying reaction time, microwave power, anhydride and pyridine amount on the reaction yield and composition were studied. (usda.gov)
  • Maleic Anhydride is a hydrocarbon with the chemical formula C2H2(CO)2O. (chemanalyst.com)
  • Maleic anhydride is hydrogenated to 1,4-butanediol (BDO), used in the production of thermoplastic polyurethanes, elastane/Spandex fibers, polybutylene terephthalate (PBT) resins and many other products. (wikipedia.org)
  • In 2022, approximately 50% of global Maleic Anhydride was utilized by the Unsaturated polyester resins sector, and it is anticipated to expand further in the forecast period. (chemanalyst.com)
  • Polyester resins are unsaturated synthetic resins formed by the reaction of dibasic organic acids and polyhydric alcohols. (robertvanogallery.com)
  • This method involves the reaction of acetylene and formaldehyde in the presence of a catalyst to form vinyl acetaldehyde. (3mcrystal.com)
  • The oxidative reaction mechanism was studied using the multireference method CASSCF to explore the hypersurface of the two most accessible singlet excited states, and by DFT for the ground state. (bvsalud.org)
  • For this last reaction, in which one extra oxygen must be acquired, we hypothesize a mechanism with singlet oxygen as the oxidant. (bvsalud.org)
  • Reaction engineering is contributing to the development of efficient, sustainable products, processes and services. (dechema.de)
  • Upon solar irradiation in the lower troposphere, the main photochemical products are ketene-enol (a key intermediate product), furanones, and maleic anhydride. (bvsalud.org)
  • Personal care products consuming maleic anhydride include hair sprays, adhesives and floor polishes. (sharjahchemical.com)
  • In the p -xylene experiment, the products identified were E/Z-hex-3-en-2,5-dione and citraconic anhydride. (copernicus.org)
  • For 1,3,5-TMB reactions, the products identified were 3,5-dimethylbenzaldehyde, 3,5-dimethyl-3H-furan-2-one and 3-methyl-5-methylene-5H-furan-2-one. (copernicus.org)
  • Other synthesis routes include the use of maleic anhydride and tetrahydrofuran as starting materials. (3mcrystal.com)
  • Vapor-phase functionalization reactions were then carried out with trifluorinated amines to confirm the viability of this technique to bond molecules to surfaces. (dur.ac.uk)
  • It is through this reaction that maleic anhydride is converted to many pesticides and pharmaceuticals. (wikipedia.org)
  • Developments in modern reaction engineering are nowadays used in chemical production, but also in neighboring areas of pharmaceutical production, energy supply, conversion, storage, materials science and many other fields of modern industrial society. (dechema.de)
  • The third key topic will be the development of processes for the use of new, sustainable raw materials for chemical production and the essential contribution made by reaction engineering, which will make it possible to create new viable value chains. (dechema.de)
  • This detailed study presents plant construction cost, Maleic Anhydride production cost breakdown, and raw materials consumption figures. (newswire.com)
  • Wanhua will begin operating one of the biggest maleic anhydride production facilities in the world, with an annual output capacity of 200 thousand tonnes. (chemanalyst.com)
  • The primary driver of the Maleic Anhydride global market prominently the production of Unsaturated Polyester Resin (UPR). (chemanalyst.com)
  • Subsequent functionalization reactions led to the secure attachment of dendrimers and Jeffamines® at any desired packing density. (dur.ac.uk)
  • Improved yields in reactions limited by equilibrium, such as the processes for obtaining hydrogen by reforming. (legendkings.com)
  • Two water molecules are also necessary to form maleic anhydride from furan-2-ol. (bvsalud.org)
  • Usually, the vanadium-phosphorus oxide is employed as a catalyst in this chemical reaction. (chemanalyst.com)
  • Maleic Anhydride is a versatile chemical that is used in almost all chemical industries, and its wide range of applications is expected to boost its market growth in the upcoming years. (chemanalyst.com)
  • Maleic anhydride is an organic compound with the formula C2H2(CO)2O. (wikipedia.org)
  • The main cause of the slowing price dynamics of maleic anhydride was hazy consumer spending and low consumption rate. (chemanalyst.com)
  • Another market for maleic anhydride is lubricating oil additives, which are used in gasoline and diesel engine crankcase oils as dispersants and corrosion inhibitors. (wikipedia.org)
  • Changes in lubricant specifications and more efficient engines have had a negative effect on the demand for lubricating oil additives, giving flat growth prospects for maleic anhydride in this application. (wikipedia.org)
  • A PS-b-PnBMA with maleic anhydride (SBM66-MAH) exhibited an unexpected thermoreversible transition occurring at higher temperature than its disorder-to-order transition temperature. (elsevierpure.com)
  • The melting temperature of polyethylene grafted maleic anhydride (121 °C) decreased to 111 °C because of the small crystal size of the polyethylene grafted maleic anhydride phase. (cmu.ac.th)
  • Maleic anhydride is used in many applications. (wikipedia.org)
  • A number of smaller applications for maleic anhydride. (wikipedia.org)
  • The optimal operating condition was found at 120ºC, 1 mol of maleic anhydride/mol of castor oil and 0.005 mol of DTBP/mol of castor oil, yielding 90.2% of castor oil maleate in 90 min. (scielo.org)
  • Purification of ε-Caprolactam Monomers via Crystallization from a Depolymerization Reaction Mixture. (mpg.de)
  • Therefore, there is a need to develop a method for the preparation of mixtures of chelating agents in situ in the same reaction mixture. (justia.com)
  • The optimum samplewas used to produce unsaturated polyester resin [UPR]by maleic anhydride [MA]. (4spe.org)
  • Their 1928 patent also provided many other examples of reactions involving maleic anhydride, such as the reaction with cyclopentadiene to form nadic anhydride. (wikipedia.org)
  • Maleic anhydride dimerizes in a photochemical reaction to form cyclobutane tetracarboxylic dianhydride (CBTA). (wikipedia.org)
  • The growing Building and Construction sector, along with Automotive, is going to drive the demand for Maleic Anhydride in the forecast period and reach approximately 3600 thousand tonnes by 2032. (chemanalyst.com)