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Citation: LIU Jun-Hui, LI Jun, ZHANG Ai-Ping, LIU Jun-Long, GAO Shuang. Reaction-controlled Phase-transfer Catalysis for Epoxidation of Styrene[J]. Chinese Journal of Applied Chemistry, ;2010, 27(7): 769-772. doi: 10.3724/SP.J.1095.2010.90780 shu

Reaction-controlled Phase-transfer Catalysis for Epoxidation of Styrene

a. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Key Laboratory of Clean Catalytic Synthesis, Dalian 116023;
b. School of Chemical Engineering and Materials, Dalian Polytechnic University, Dalian 116023

Received Date: 25 November 2009
Revised Date: 10 January 2010

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.
- reaction-controlled phase-transfer catalysis,
- styrene,
- epoxidation
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