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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/6369

Title: Allylic oxidation of cyclohexene over chromium containing mesoporous molecular sieves
Authors: SAKTHIVEL, A
DAPURKAR, SE
SELVAM, P
Keywords: liquid-phase oxidations
selective oxidation
heterogeneous catalysts
polymerization catalyst
silica
(cr)mcm-41
alkylaromatics
chemistry
alcohols
crapo-5
Issue Date: 2003
Publisher: ELSEVIER SCIENCE BV
Citation: APPLIED CATALYSIS A-GENERAL, 246(2), 283-293
Abstract: Allylic oxidation of cyclohexene was carried out over mesoporous (Cr)MCM-41 and (Cr)MCM-48 molecular sieve catalysts. In both the cases, 2-cyclohexen-1-one was obtained as the major product with small amounts of cyclohexene oxide and 1.2-cyclohexandiol. (Cr)MCM-48 showed higher activity than (Cr)MCM-41 owing to the high chromium content in the former. The use of polar solvents such as acetonitrile and methanol decrease the 2-cyclohexen-1-one selectivity; however, such a procedure produces double bond oxidized product, viz. cyclohexene oxide. Furthermore, unlike many other chromium-based solid catalysts, the activity over recycled as well as washed (Cr)MCM-41 and (Cr)MCM-48 remains nearly the same, indicating that the mesoporous chromosilicate materials behave truly as heterogeneous catalysts. In other words, after the initial loss of non-framework chromium ions for the first time, no leaching was noticed for the chromium-based systems. (C) 2003 .
URI: http://dx.doi.org/10.1016/S0926-860X(03)00051-6
http://dspace.library.iitb.ac.in/xmlui/handle/10054/6369
http://hdl.handle.net/10054/6369
ISSN: 0926-860X
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