Issue 3, 2003
From the journal:

Green Chemistry

Green and selective epoxidation of alkenes catalysed by new TiO2–SiO2 SBA mesoporous solids

F. Chiker,a   F. Launay,a   J. P. Nogiera  and  J. L. Bonardeta  

a Laboratoire des Systèmes Interfaciaux à l'Echelle Nanométrique, CNRS (FRE 2312), case courrier 196, Université P. et M. Curie, T54, 4 place Jussieu, F-75252 Paris Cedex 05, France

Abstract

New catalysts TiO2–SiO2 (Ti–SBA) with pore sizes of 37 and 65 Å have been synthesized by grafting titanium on a structured mesoporous SBA15 (SBA for Santa BArbara and 15 for hexagonal structure) by means of titanium tetrachloride in the gas phase. These catalysts have been tested in the selective epoxidation of cyclooctene, cyclohexene, (R)-limonene and α-pinene. Whatever the oxidant, hydrogen peroxide (H2O2), tert-butyl hydroperoxide (TBHP) or cumyl hydroperoxide (CHP), the selectivity is 100%. However, the yield is low with H2O2 and the catalyst is partially leached out. In the case of TBHP and CHP the epoxide yields can reach practically 100% and no leaching of titanium is observed after four successive reaction cycles. An effect of pore size on the epoxidation kinetics of α-pinene and cyclooctene has been found.

Graphical abstract: Green and selective epoxidation of alkenes catalysed by new TiO2–SiO2 SBA mesoporous solids

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Article information

DOI
https://doi.org/10.1039/B300244F
Article type
Paper
Submitted
08 Jan 2003
First published
30 Apr 2003

Green Chem., 2003,5, 318-322

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Green and selective epoxidation of alkenes catalysed by new TiO2–SiO2 SBA mesoporous solids

F. Chiker, F. Launay, J. P. Nogier and J. L. Bonardet, Green Chem., 2003, 5, 318 DOI: 10.1039/B300244F

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