Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/78501
Type: Artigo de periódico
Title: Catalytic activity and stability of a chromium containing silicate in liquid phase cyclohexane oxidation
Author: da Cruz, RS
Silva, JMDE
Arnold, U
Schuchardt, U
Abstract: A chromium containing silicate has been prepared by an acid-catalyzed sol-gel process. The material was characterized by FTIR, W-VIS and EPR spectroscopy as well as TPR, XRD and XRF analyses. The silicate is an efficient catalyst for the oxidation of cyclohexane with tert-butyl hydroperoxide. Leaching studies showed that catalysis is at least in part due to traces of Cr leached into the homogeneous phase. Weakly bound Cr species can be removed by soxhlet extraction, yielding a catalyst which is remarkably leaching resistant. The catalyst can be used at least four times without detectable loss of metal. (C) 2001 Elsevier Science B.V. All rights reserved.
Subject: metallosilicates
chromium
cyclohexane oxidation
tert-butyl hydroperoxide
sol-gel process
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/S1381-1169(01)00111-X
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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