• In order to compare the catalytic activities, we used the prepared catalysts in the isomerizations of butane and n-heptane, hydroisomerization of heptane, aldol condensation, acylation, esterification, and cracking of cumene. (elsevierpure.com)
  • Molybdenum phosphide supported on Hβ zeolite (MoP/Hβ) catalyzed hydroisomerization of n -heptane has been reported to be enhanced by doping with secondary metals (Cr, Ni or Ce). (sigmaaldrich.com)
  • The two catalysts were tested in a continuous flow fixed-bed reactor under 5 bars hydrogen pressure at 400 °C for n-heptane hydrocracking and hydroisomerization. (nyu.edu)
  • Anis, SF, Singaravel, G & Hashaikeh, R 2017, ' Electropsun Ni-W/zeolite composite fibers for n-heptane hydrocracking and hydroisomerization ', Materials Chemistry and Physics , vol. 200, pp. 146-154. (nyu.edu)
  • The catalyst Pt/HBM-41 with 0.4% Pt loading ( w ) was prepared with HBM-41 as support, and applied to the hydroisomerization of n-heptane. (sylzyhg.com)
  • Hydroisomerization and hydrocracking of n-heptane on Pth zeolites. (sylzyhg.com)
  • For Pt/Y catalysts prepared with CPA, a loading of 0.3 wt % Pt (nPt/nA = 0.08 mol/mol) sufficed for n-heptane hydroisomerization, whereas a detrimental effect on n-hexadecane hydroisomerization was observed, in particular undesired secondary cracking occurred to a significant extent. (uu.nl)
  • If gasoline is the required product, the acidic component of the catalyst will be preferably a zeolite, the strong acidity of which will favor successive cracking reactions of the feed molecules with formation of the desired light products[9]. (mhount.wiki)
  • For the reasons explained above, a sulfided NiW/silica-alumina catalyst was chosen, and was compared to a strongly acidic NiW/USHY zeolite catalyst. (mhount.wiki)
  • The results obtained in the present work indicate that the behavior of the NiW/silica-alumina catalyst for n-decane hydrocracking in the presence of nitrogen-containing compounds is very different from that of classical hydrocracking catalysts such as NiW/USHY zeolite. (mhount.wiki)
  • The preparation of zeolite-based bifunctional catalysts with low noble metal loadings while maintaining optimal performance has been studied. (uu.nl)
  • This study thus shows the impact of local metal loading variations at the zeolite crystal scale (nanoscale) caused by different interactions of metal precursors with the zeolite, which are essential to design and synthesize optimal catalysts, in particular at low noble metal loadings. (uu.nl)
  • Heptane is a linear hydrocarbon that is considered as a greener alternative to the more toxic hexane. (bszh.cn)
  • New use for succinylated sugarcane bagasse containing adsorbed Cu2+ and Ni2+ : efficient catalysts for gas-phase n-hexane and n-heptane oxidation reactions. (ufop.br)
  • Since then, many groups have been investigating new combinations of intermetallic compounds (consisting of a rare earth metal and an active transition metal), with the goal of developing much more efficient catalysts for the chemical industry. (titech.ac.jp)
  • The different selectivities were measured, in particular the isomerization/cracking selectivity which can be considered as representative of the selectivity of the catalyst for the production of middle distillates. (mhount.wiki)
  • The latter which was reflected in less olefin formation and superior n-heptane isomerization. (nyu.edu)
  • Water is added to the reaction mixture to hydrolyse the acetal groups and Raney nickel is added as a hydrogenation catalyst. (wikipedia.org)
  • This feature motivated us to apply Y 3 Pd 2 as a Suzuki coupling reaction catalyst as the reaction barrier of the rate-determining step can be suppressed through electron transfer from the electride to the substrates. (titech.ac.jp)
  • The catalysts were first sulfided in the reactor by a n-heptane/dimethyl disulfide/aniline mixture, under the same pressures as those used for the n-decane hydrocracking reaction, and at a 0.27-min contact time (1/WHSV). (mhount.wiki)
  • Status cations of transition elements and titanium was characterized by UV-Vis DRS. The catalysts were tested in the oxidation reaction of heptane. (tsu.ru)
  • Oxo technology for the manufacture of aldehydes using homogeneous catalysts are well known in which the addition of carbon monoxide and hydrogen to an olefin in the presence of metal complex catalyst soluble in the reaction medium is involved. (allindianpatents.com)
  • Through the transesterification reaction, triglycerides (i.e. oils or fats) are chemically reacted with an alcohol, usually methanol, in the presence of a catalyst, like sodium or potassium hydroxide, yielding fatty acid methyl esters (FAMEs) and glycerin by-product. (sigmaaldrich.com)
  • The sulfated zirconia catalysts were prepared by the equilibrium adsorption method and the ammonium sulfate kneading method using the reference catalysts JRC-ZRO-2, -3, -4, and -5, supplied by the Reference Catalyst Division of the Catalysis Society of Japan. (elsevierpure.com)
  • Metal oxides are ubiquitous in catalysis as supports for active species or as catalysts themselves. (nature.com)
  • To obtain a better understanding of the behavior of the NiW/silica-alumina catalyst, we also studied the transformation of n-decane on a nonacidic NiW/alumina catalyst, on an unpromoted W/silica-alumina catalyst, and finally on NiW/silica-alumina in the absence of nitrogen-containing compound in the feed. (mhount.wiki)
  • His research concerns the integration of catalytic descriptors in kinetic models for an optimized development of new catalysts (application to dehydrocyclization / dehydrogenation of n-heptane). (ifpenergiesnouvelles.com)
  • Its oxidative dehydrogenation in the presence of magnesium oxide supported vanadium catalyst has been investigated. (sigmaaldrich.com)
  • Heptane ( n -Heptane) is a primary reference fuel (PRF) for the rating of octane numbers of fuels in internal combustion engines. (sigmaaldrich.com)
  • Iso-octane is given a rating of 100, whereas heptane is rated 0. (britannica.com)
  • Engine performance of a particular gasoline is compared to the performance of iso-octane and heptane fuel. (britannica.com)
  • An octane number of 90 means that it compares to the performance a mixture of 90 percent iso-octane and 10 percent heptane would give. (britannica.com)
  • 1,2,6-Hexanetriol is a clear, odourless, viscous, high-boiling and hygroscopic liquid, which is miscible with water and polar organic solvents but immiscible with non-polar solvents such as benzene, diethyl ether or heptane. (wikipedia.org)
  • 1)Benzene adds three molecules of hydrogen in presence of Raney nickel or platinum as catalyst at 473-523 K to form cyclohexane. (org.in)
  • Charles Friedel and James Crafts discovered these reactions in 1877 and include alkylation reactions and acylation reactions.2 Alkyl halides alkylate benzene to form alkylbenzenes in presence of Lewis acid catalysts. (ukessays.com)
  • Shu-Li You, Shanghai Institute of Organic Chemistry, University of the Chinese Academy of Sciences, and colleagues have developed a method for the synthesis of enantioenriched cyclobutane derivatives (oxa-[3,2,0]-bicyclic heptanes, general structure pictured) that proceeds in a cascade fashion. (chemistryviews.org)
  • The object of the present invention, therefore is to prepare the aldehydes using alkene and formaldehyde in presence of transition metal complex catalyst and also to avoid use of synthesis gas containing carbon monoxide and hydrogen, which required in conventional oxo process for manufacture of aldehydes. (allindianpatents.com)
  • To tackle this issue, the team used a pulverizing technique called ball-milling 2 and compared catalytic activity using different solvents such as heptane and ethanol. (titech.ac.jp)
  • Hydrocracking catalysts are bifunctional, associating a hydro-dehydrogenating function with an acidic one. (mhount.wiki)
  • On the contrary, the catalysts which would allow an optimal gas oil yield which would possess a moderate acidity, halfway between that of zeolites (low selectivity) and that of aluminas (too low activity). (mhount.wiki)
  • Catalyst components for the preparation of a polyolefin such as for example polypropylene are generally known and the essential elements for the preparation of such catalyst components are a magnesium-containing compound and a titanium compound supported thereon. (allindianpatents.com)
  • In support of this idea, a mesoporous silica shell/platinum catalyst/silica core (mSiO 2 /Pt/SiO 2 ) 3D architecture that isolates small Pt nanoparticles at the bottom of mesoporous wells provides high activity and long catalyst lifetimes in polyolefin hydrogenolysis 16 , 17 . (nature.com)
  • Catalysts TiO2-SiO2 composition in the form of hollow spheres modified cobalt and chromium was obtained. (tsu.ru)
  • Since the feeds to be treated contain significant amounts of heteroatoms (sulfur and nitrogen), the catalysts must resist poisoning by hydrogen sulfide and ammonia. (mhount.wiki)
  • In the first hydrogenation step from HMF to tetrahydrofuran-dimethanol, Raney nickel again shows the highest catalyst activity. (wikipedia.org)
  • That is why the hydro-dehydrogenating function of industrial hydrocracking catalysts is generally provided by mixed sulfides of group VI and VIII metals, such as molybdenum or tungstene promoted by nickel or cobalt. (mhount.wiki)
  • In catalytic reactions, such materials either make use of acidic or basic surface sites or act as supports for reduced metal nanoparticles, single-atom catalysts or surface organometallic chemistry (SOMC) species, rather than forming metal-carbon bonds themselves. (nature.com)
  • Heptane ( n -Heptane) is an alkane hydrocarbon. (bszh.cn)
  • This makes our catalyst extremely robust and stable for long-term usage, without deactivation. (titech.ac.jp)
  • Despite high product yields, a lightly colored product is obtained on this direct route and the hydrogenation catalyst is rapidly poisoned under the high aldehyde concentrations. (wikipedia.org)
  • Further hydrogenation, even with expensive rhodium-rhenium catalysts, leads only to modest selectivities and unsatisfactory yields. (wikipedia.org)
  • Under these conditions, a wide range of oxa-[3,2,0]-bicyclic heptanes were obtained in moderate to high yields with good diastereoselectivities and excellent enantioselectivities. (chemistryviews.org)
  • DIN EN 14110, Fat and Oil Derivatives - Fatty Acid Methyl Esters (FAME) - Determination of Methanol Content. (sigmaaldrich.com)
  • Catalysts encourage chemical reactions and are used in gasoline production to increase the yield and improve the quality of the product. (britannica.com)
  • Our objective was to study hydrocracking catalysts allowing a selective transformation of vacuum distillates into gas oil. (mhount.wiki)
  • Researchers at Tokyo Institute of Technology (Tokyo Tech) have developed an electride 1 material composed of yttrium and palladium (Y 3 Pd 2 ) as a catalyst for Suzuki cross-coupling reactions. (titech.ac.jp)
  • In 2009, Nørskov and co-workers published groundbreaking findings on catalysts made of platinum alloyed with early transition metals, including yttrium. (titech.ac.jp)
  • More particularly it relates to a process using formaldehyde and alkene in presence of organic soluble transition metal complex catalyst. (allindianpatents.com)
  • It is an advantage of the process according to the present invention that a catalyst with a higher activity is obtained if before being contacted with the titanium tetrachloride, the solid magnesium containing support, having the formula Mg(OAIk)xCly, is treated with titanium tetraalkoxide Ti (OAIk) Generally, the alkyl group Alk of Mg(OAIk)xCly is an alkyl group with 1-8 carbon atoms. (allindianpatents.com)
  • The organic phase contains olefin, either in pure form or a solution in organic solvent and water insoluble metal complex catalyst comprising of group VIII element such as Rh, Ru, Ir or Co. The aqueous phase contains 3 0% formaldehyde. (allindianpatents.com)
  • Thermal cracking has been replaced by catalytic cracking ( see catalyst ). (britannica.com)
  • These novel composite fibers showed a uniform elemental distribution which is beneficial for a hydrocracking catalyst, providing close proximity of the acidic and hydrogenation sites. (nyu.edu)
  • The catalysts were characterized by elemental analysis, NH 3 -TPD, XRD, TG-DTA, CO 2 -TPD, Raman spectroscopy, and measurements of the surface area, pore size distribution, coverage (by the BAT method), and heat of Ar adsorption. (elsevierpure.com)
  • Through a series of calculations and experimental studies, Ye and his team showed that Y 3 Pd 2 has a strong electron-donating effect associated with a low work function and high carrier density - features that enable the catalyst to work at a much lower activation energy than that of a pure Pd catalyst. (titech.ac.jp)
  • The preparation of such catalyst components is for instance described in WO-A-96/32427. (allindianpatents.com)
  • On the other hand, the kneading method provided catalysts with high reproducibility. (elsevierpure.com)
  • It is the object of the invention to provide a process for the preparation of a polymerization catalyst component and furthermore to provide a polymerization catalyst comprising this catalyst component to obtain a higher catalyst yield during the polymerization of an olefin while maintaining other required characteristics such as for example a high bulk density and a narrow span. (allindianpatents.com)
  • How to cite (IEEE): K. Onlamnao, S. Phromphithak, and N. Tippayawong, "Generating Organic Liquid Products from Catalytic Cracking of Used Cooking Oil over Mechanically Mixed Catalysts," International Journal of Renewable Energy Development , vol. 9, no. 2, pp. 159-166, Jul. (undip.ac.id)
  • How to cite (Vancouver): Onlamnao K, Phromphithak S, Tippayawong N. Generating Organic Liquid Products from Catalytic Cracking of Used Cooking Oil over Mechanically Mixed Catalysts. (undip.ac.id)
  • The invention is directed to a process for the preparation of a polymerization catalyst component. (allindianpatents.com)
  • The reusability of the catalyst (up to 20 cycles) and the relative ease with which Pd atoms can be recovered represents an important step to achieving greater sustainability in the chemical industry. (titech.ac.jp)
  • DIN EN 14103 specifies a procedure for determining the FAME profile in B100 biodiesel samples. (sigmaaldrich.com)
  • The method has a broad substrate scope, uses alkene substrates without directing groups, and is operationally simple due to the simultaneous addition of all starting materials and catalysts, without a need for the isolation of the ether intermediates. (chemistryviews.org)
  • Heptane (method no. (cdc.gov)
  • X. Mu (2014), "One-Step Conversion of Biomass-Derived 5-Hydroxymethylfurfural to 1,2,6-Hexanetriol Over Ni-Co-Al Mixed Oxide Catalysts Under Mild Conditions", ACS Sustain. (wikipedia.org)