Results 221 to 230 of about 63,695 (265)
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CsF supported by α-alumina: an efficient basic catalyst
Applied Catalysis B: Environmental, 2004Abstract 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. +6 more
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Basic catalysts and fine chemicals
1993Abstract 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, 1994AbstractChemInform 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, 1999An 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 +2 more
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Characterisation of the basicity of modified MgO-catalysts
Applied Catalysis A: General, 1999Abstract 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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Sodium titanate as basic catalyst in transesterification reactions
Fuel, 2014Abstract Sodium titanate was synthesized by the sol–gel method and characterized using X-ray diffraction, thermogravimetry-mass spectrometry, atomic absorption spectroscopy, scanning electron microscopy, energy-dispersive X-ray analysis and nitrogen physisorption. The non-calcined material was active as a catalyst in transesterification reactions and
Marciniuk, Leticia L. +4 more
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Amino-functionalized basic catalysts with MIL-101 structure
Microporous and Mesoporous Materials, 2012Abstract Metal–organic framework (MOF) materials have only been scarcely explored for applications in heterogeneous catalysis in recent years. In addition to the use of MOFs as supports for the deposition of highly dispersed metal particles, the incorporation of active centers such as coordinatively unsaturated metal sites and the functionalization ...
Martin Hartmann, Marcus Fischer
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Deep hexachlorocyclohexane oxidation on molten high-basic catalysts
Russian Journal of Applied Chemistry, 2013Gas-liquid chromatography, chromato-mass-spectrometry, and capillary electrophoresis method were used to study the reaction of deep oxidation of γ-C6H6Cl6 (lindane, an insecticide of contact, enteric, and fumigant action) on molten eutectic mixtures of alkali metal hydroxides and carbonates with and without addition of active components: V2O5, CuO, and
T. A. Rozdyalovskaya, Yu. S. Chekryshkin
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Electrochemical Activation of Molecular Catalysts: From Basics to Applications
2018In this article, the fundamental concepts of redox catalysis are first presented. While the one electron scheme provides general guidelines, it needs to be adapted when more complex systems involving several chemical reactions and electron transfer are concerned.
Fillaud, Laure +3 more
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A novel way for ethoxylation with basic catalysts
Journal of the American Oil Chemists' Society, 1983AbstractEthoxylation of dodecyl alcohol catalyzed by alkali hydroxides are accelerated by adding complexing agents for the alkali ions. The rate of ethoxylation could be increased by crown ether and dodecyl alcohols of a higher degree of ethoxylation.
JenŐ Morgós +3 more
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