Results 111 to 120 of about 485,332 (140)

New perspectives on basic zeolites as catalysts and catalyst supports

Journal of Catalysis, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
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Catalyst-Controlled Regioselective Chlorination of Phenols and Anilines through a Lewis Basic Selenoether Catalyst

The Journal of Organic Chemistry, 2020
We report a highly efficient ortho-selective electrophilic chlorination of phenols utilizing a Lewis basic selenoether catalyst. The selenoether catalyst resulted in comparable selectivities to our previously reported bis-thiourea ortho-selective catalyst, with a catalyst loading as low as 1%.
Andrew N. Dinh, Sean M. Maddox, Sagar D. Vaidya, Mirza A. Saputra, Christopher J. Nalbandian, Jeffrey L. Gustafson   +5 more
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Methanolysis of triacylglycerols by organic basic catalysts

European Journal of Lipid Science and Technology, 2007
AbstractMethanolysis of rapeseed and soybean oil was studied using organic basic catalysts at boiling with reflux. The molar ratio methanol/free fatty acids (FFA) amounted to approx 2.8 : 1. The catalyst (guanidine carbonate) is used at concentrations between 0.5 and 1.3 wt‐% with respect to the oil.
Siegfried Peter, Eckhard Weidner
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New Chiral Basic Heterogeneous Catalyst Based on Csβ Zeolite.

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Evgeniy V. Suslov, Dina V. Korchagina, Nina I. Komarova, Konstantin P. Volcho, Nariman F. Salakhutdinov   +4 more
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Porous Silicon Nitride Materials as Basic Catalysts

Chemical Engineering & Technology, 2001
Silicon nitride powders characterized by a high specific surface area were prepared by gas-phase ammonolysis of tetrachlorosilane. The compositions as well as the structural and textural properties of the materials were varied by the reaction conditions and the aftertreatment of the synthesis products.
D. Hullmann, G. Wendt, G. Ziegenbalg
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CsF supported by α-alumina: an efficient basic catalyst

Applied Catalysis B: Environmental, 2004
Abstract CsF supported by α- and γ-alumina was characterized by DTG-DTA coupled with mass spectral analysis of the gases evolved by the solid, XRD, 19 F NMR spectroscopy, and tested in the Michael addition of cyclohexene-2-one with nitroalkanes and in the synthesis of alkyl carbonates.
Clacens, J.-M., Genuit, D., Veldurthy, B., Bergerest, G., Delmotte, L., Garcia-Ruiz, A., Figueras, F.   +6 more
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Basic catalysts and fine chemicals

1993
Abstract Catalytic behaviors of solid base catalysts for fine chemicals synthesis as well as the fundamental reactions are described. The reactions included are double bond isomerization of olefins, addition of hydrogen and amines to conjugated dienes, dehydration, dehydrogenation, reduction, alkylation, aldol addition and condensation, Wittig-Horner
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ChemInform Abstract: Basic Catalysts and Fine Chemicals

ChemInform, 1994
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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Aluminovanadate Oxynitride Catalyst:  Proposition for the Basic Site

The Journal of Physical Chemistry B, 1999
An aluminovanadate oxynitride (AlVON) catalyst is synthesized. This catalyst is active in the Knoevenagel condensation reaction between malononitrile and benzaldehyde, showing that it has basic sites. DRIFT characterization has evidenced the presence of ammonium ions due to the neutralization by ammonia of hydroxyl Bronsted acid sites.
Hugues M. Wiame, Caroline M. Cellier, Paul Grange   +2 more
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Characterisation of the basicity of modified MgO-catalysts

Applied Catalysis A: General, 1999
Abstract The modification of magnesium oxide with caesium, barium or yttrium oxide was carried out in order to increase its base strength. The decomposition of 2-butanol and 2-methyl-3-butyn-2-ol as well as the FTIR investigation of adsorbed acid probe molecules on the catalysts were used as basicity characterisation methods.
P Thomasson, O.S Tyagi, H Knözinger
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