Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/81562
Type: Artigo de periódico
Title: Oxidation of cyclohexanol to epsilon-caprolactone with aqueous hydrogen peroxide on H3PW12O40 and Cs2.5H0.5PW12O40
Author: Balbinot, L
Schuchardt, U
Vera, C
Sepulveda, J
Abstract: Liquid phase cyclohexanol catalytic oxidation to cyclohexanone and epsilon(epsilon)-caprolactone were studied using aqueous hydrogen peroxide as oxidant and H3PW12O40 (HPA) and H0.5Cs2.5PW12O40 (CS-Salt) as catalysts. The hydrophobic and insoluble Cs-salt showed the highest activity (per unit catalytic weight and turnover number) and selectivity to (epsilon)-caprolactone. The ultrafine Cs-salt crystallites could be filtrated and recycled. Solvent effects on the activity and selectivity and the rate of peroxide decomposition were assessed and they were correlated to their polarity and protic/aprotic nature. When employing acetonitrile at 90 degrees C the highest activity and selectivity were achieved and also the lowest rate of hydrogen peroxide decomposition. (C) 2008 Elsevier B.V. All rights reserved.
Subject: heteropoly compound
catalytic oxidation
cyclohexanone
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.catcom.2008.03.006
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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