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Type: Artigo de periódico
Title: Cyclohexene and cycloodene epoxidation with aqueous hydrogen peroxide using transition metal-free sol-gel alumina as catalyst
Author: Rinaldi, R
Sepulveda, J
Schuchardt, U
Abstract: It is shown that sol-gel alumina calcined at 400 degreesC is a very efficient catalyst for the epoxidation of cyclohexene and cyclooctene with aqueous 70 wt % hydrogen peroxide. The overall yield per g of catalyst was 0.28 mol of cyclohexene oxide in 5 cycles of 450 min each and 0.43 mol of cyclooctene oxide in 4 cycles of 750 min each. The selectivity for the epoxides was always better than 99%. However, the catalyst deactives slowly, which we believe is caused by a non-radical decomposition of hydrogen peroxide.
Subject: alumina
catalytic epoxidation
green chemistry
hydrogen peroxide
Country: Alemanha
Editor: Wiley-v C H Verlag Gmbh
Rights: fechado
Identifier DOI: 10.1002/adsc.200303176
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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