Cobalt Catalysts
Mostrando 37-40 de 40 artigos, teses e dissertações.
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37. "Oxidação do cicloexeno a cicloexanona pelo Processo Wacker"
Cyclohexanone is an important industrial intermediate which is normally obtained together with cyclohexanol by cyclohexane oxidation using homogeneous cobalt catalysts. The conversion is limited to 4% in order to keep the selectivity high. In this work, we studied the synthesis of cyclohexanone by Wacker oxidation of cyclohexene using the chloride ion- free
Publicado em: 2004
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38. Sintese e reações de alguns compostos ciclicos de tres membros com complexos de metais de transição
With the aim of studying the reactivity of some cyclopropane derivatives with respect to certain transition metal complexes of the d group, the a-chlorine-a-(cyclopropiliden)-methyl acetates 1a and 1b, the alquinilcyclopropanes 2a-i and the 3-cyclopropil-2H-azirine 3a were synthesized. Reactions of these cyclopropanes with organometalic complexes of the nick
Publicado em: 2004
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39. Preparation and characterization of alumina-supported Co and Ag/Co catalysts
The effect of silver addition as a promoter in alumina supported cobalt oxide catalysts is investigated in this study. The Co/Al2O3 and Ag/Co/Al2O3 catalysts were prepared by incipient wetness impregnation. The catalysts were characterized by inductively-coupled plasma spectrometry, X-ray diffraction (XRD), temperature programmed reduction with hydrogen (TPR
Materials Research. Publicado em: 2003-12
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40. Electrocatalytically driven omega-hydroxylation of fatty acids using cytochrome P450 4A1.
The cyclic enzymatic function of a cytochrome P450, as it catalyzes the oxygen-dependent metabolism of many organic chemicals, requires the delivery of two electrons to the hemeprotein. In general these electrons are transferred from NADPH to the P450 via an FMN- and FAD-containing flavoprotein (NADPH-P450 reductase). The present paper shows that NADPH can b