Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/57549
Type: Artigo de periódico
Title: Cyclooctene epoxidation using Nb-MCM-41 and Ti-MCM-41 synthesized at room temperature
Author: Gallo, JMR
Paulino, IS
Schuchardt, U
Abstract: An efficient and simple method for preparing titanium or niobium containing MCM-41 has been developed. The mesoporous materials were synthesized at room temperature using tetraethoxysilane (TEOS), cetyltrimethylammonium bromide (CTMABr) as template and (NH4)(2)TiF6 or NH4[NbO(C2O4)(2)(H2O)(2)].(H2O)(3) as metal source. The materials were characterized by X-ray diffraction (XRD),FT-IR and diffuse reflectance UV-Vis spectroscopies, which showed that most of the metal was incorporated into the framework of MCM-41. Ti and Nb containing MCM-41 were tested in the solvent-free epoxidation of cis-cyclooctene using tert-butyl hydroperoxide as oxidant and a catalyst: cyclooctene molar ratio of 1:1000. After 24h of reaction using Ti-MCM-41 and Nb-MCM-41 as catalyst, we obtained 82 and 65% yields of cyclooctene oxide, respectively, without formation of any by-products. (C) 2004 Elsevier B.V. All rights reserved.
Subject: epoxidation
Ti-MCM-41
Nb-MCM-41
tert-butyl hydroperoxide
cyclooctene
Country: Holanda
Editor: Elsevier Science Bv
Rights: fechado
Identifier DOI: 10.1016/j.apcata.2004.02.010
Date Issue: 2004
Appears in Collections:Unicamp - Artigos e Outros Documentos

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