| Lacunary Keggin Polyoxotungstate as Reaction-controlled Phase-transfer Catalyst for Catalytic Epoxidation of Olefins |
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| 作者姓名： | 李明强 蹇锡高 杨永强 |
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| 作者单位： | DepartmentofPolymerScience＆Materials,DalianUniversityofTechnology,Dalian,Liaoning116012,China |
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| 基金项目： | Project supported by the National Natural 863 Plan of China (No. 2001AA33440203). |
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| 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 epoxidarion reaction is clean and exhibits high conversion and selectivity as well as excellent catalyst stability.
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| 关 键 词： | Keggin结构 钨酸盐 可控相转移催化剂 环氧化反应 烯烃 过氧化氢 |
Lacunary Keggin Polyoxotungstate as Reaction-controlled Phase-transfer Catalyst for Catalytic Epoxidation of Olefins |
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| LI,Ming-Qiang.Lacunary Keggin Polyoxotungstate as Reaction-controlled Phase-transfer Catalyst for Catalytic Epoxidation of Olefins[J].Chinese Journal of Chemistry,2004,22(8):874-876. |
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| Authors: | LI Ming-Qiang |
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| Abstract: | 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. |
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| Keywords: | reaction-controlled phase-transfer catalyst olefins epoxidation |
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