Lacunary Keggin Polyoxotungstate as Reaction-controlled Phase-transfer Catalyst for Catalytic Epoxidation of Olefins  

作　　者：李明强 蹇锡高 杨永强 

机构地区：[1]Department of Polymer Science & Materials, Dalian University of Technology, Dalian, Liaoning 116012, China

出　　处：《Chinese Journal of Chemistry》2004年第8期874-876,共3页中国化学（英文版）

基　　金：Project supported by the National Natural 863 Plan of China (No. 2001AA33440203).

摘　　要：A new reaction-controlled phase-transfer catalyst system, lacunary Keggin polyoxotungstate [C7H7N(CH3)3]9PW9O34 has been synthesized and used for catalytic epoxidation of olefins with H2O2 as the oxidant. Infrared spectra were used to analyze the behavior of the phase transfer of catalyst. In this system, the catalyst not only can act as homogeneous catalyst but also as heterogeneous catalyst to be easily filtered and reused. The epoxi- dation reaction is clean and exhibits high conversion and selectivity as well as excellent catalyst stability.A new reaction-controlled phase-transfer catalyst system, lacunary Keggin polyoxotungstate [C7H7N(CH3)3]9PW9O34 has been synthesized and used for catalytic epoxidation of olefins with H2O2 as the oxidant. Infrared spectra were used to analyze the behavior of the phase transfer of catalyst. In this system, the catalyst not only can act as homogeneous catalyst but also as heterogeneous catalyst to be easily filtered and reused. The epoxi- dation reaction is clean and exhibits high conversion and selectivity as well as excellent catalyst stability.

关 键 词：reaction-controlled phase-transfer catalyst OLEFINS EPOXIDATION 

分 类 号：O643.3[理学—物理化学]