OXIDATION OF CYCLOHEXANE USING FEPCY-ZEOZYMES OCCLUDED IN POLYDIMETHYLSILOXANE MEMBRANES

Citation
Ifj. Vankelecom et al., OXIDATION OF CYCLOHEXANE USING FEPCY-ZEOZYMES OCCLUDED IN POLYDIMETHYLSILOXANE MEMBRANES, Journal of catalysis, 163(2), 1996, pp. 457-464
Citations number
26
Categorie Soggetti
Chemistry Physical
Journal title
ISSN journal
00219517
Volume
163
Issue
2
Year of publication
1996
Pages
457 - 464
Database
ISI
SICI code
0021-9517(1996)163:2<457:OOCUFO>2.0.ZU;2-4
Abstract
Cyclohexane is selectively oxidized by tertiary-butyl hydroperoxide at room temperature using a catalyst consisting of iron phthalocyanine i n zeolite Y (FePcY) occluded in a polydimethylsiloxane (PDMS) membrane . Different experimental setups are used to study the effect of the me mbrane incorporation on the catalytic performance. Embedding this cata lyst in PDMS results in a new system with considerably higher activity which makes the controlled addition of peroxide redundant. Separating the two immiscible reactant phases, the membrane eliminates the need for a solvent. In addition, it actively controls the concentration of the reactants near the active sites by fine-tuning their respective so rptions. The result is a substrate/oxidant ratio which is beneficial f or the reaction. Evidence for this active role is established in the a nalysis of the composition of the membrane phase after reaction. (C) 1 996 Academic Press Inc.