Reaction-controlled Phase-transfer Catalysis for Epoxidation of Styrene

doi:10.3724/SP.J.1095.2010.90780

Chinese Journal of Applied Chemistry ›› 2010, Vol. 27 ›› Issue (07): 769-772.DOI: 10.3724/SP.J.1095.2010.90780

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Reaction-controlled Phase-transfer Catalysis for Epoxidation of Styrene

LIU Jun-Hui^1,2, LI Jun¹, ZHANG Ai-Ping¹, LIU Jun-Long^2, GAO Shuang^1*

(1.Dalian Institute of Chemical Physics,Chinese Academy of Sciences,
Key Laboratory of Clean Catalytic Synthesis,Dalian 116023;
2.School of Chemical Engineering and Materials,Dalian Polytechnic University,Dalian)

Received:2009-11-25 Revised:2009-12-29 Published:2010-07-10 Online:2010-07-10
Contact: Shuang GAO

Abstract

Abstract:

In the present work, epoxidation of styrene with hydrogen peroxide catalyzed by reactioncontrolled phasetransfer catalyst of quaternary ammonium heteropolyphosphatotungstate is described. The factors such as solvents, the amount of H₂O₂, the amount of catalyst, reaction temperature, reaction time, and the concentration of styrene were investigated. It was found that the optimized conditions are ethyl acetate as the solvent, n(styrene)∶n(H₂O₂)∶n(catalyst)=300∶300∶1, the mass fraction of styrene is 10%, 60 ℃, 6 h. Under the optimized conditions, the conversion of styrene is 85.5%, and the selectivity of styrene oxide is 84.9%. The catalyst can be reused with good stability.

Key words: Reaction-controlled phase-transfer catalysis, styrene, epoxidation

CLC Number:

O625.1

LIU Jun-Hui1,2, LI Jun1, ZHANG Ai-Ping1, LIU Jun-Long2, GAO Shuang1*. Reaction-controlled Phase-transfer Catalysis for Epoxidation of Styrene[J]. Chinese Journal of Applied Chemistry, 2010, 27(07): 769-772.

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Reaction-controlled Phase-transfer Catalysis for Epoxidation of Styrene

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