Journal
CATALYSIS COMMUNICATIONS
Volume 8, Issue 10, Pages 1556-1560Publisher
ELSEVIER
DOI: 10.1016/j.catcom.2007.01.005
Keywords
styrene; styrene oxide; epoxidation; tertiary butyl hydroperoxide; CuO/SiO2; CuO/Ga2O3; CuO/In2O3; CuO/Al2O3; Cuo/Si-MCM-41
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Liquid phase epoxidation of styrene by anhydrous and aqueous TBHP to styrene oxide has been studied under reflux, using different supported CuO (viz. Cuo/Si-MCM-41, CuO/Al2O3, CuO/Ga2O3 and CuO/In2O3) as easily separable and reusable heterogeneous catalysts. The CuO/Ga2O3 catalyst showed the best performance in the epoxidation by aqueous TBHP. The CuO supported on In2O3 or Si-MCM-41 also showed very good performance in the epoxidation but only by anhydrous TBHP. However, the CUO/SiO2 catalyst, however, showed very good performance in the epoxidation by both the anhydrous and aqueous TBHP. Influence of the reaction conditions (temperature, time and TBHP/styrene ratio) on the epoxidation by aqueous TBHP over the best catalyst (CuO/Ga2O3) has been investigated. (C) 2007 Elsevier B.V. All rights reserved.
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