Acta Chimica Sinica ›› 2008, Vol. 66 ›› Issue (3): 371-375. Previous Articles     Next Articles

Original Articles

磷钨反应控制相转移催化剂的制备及表征

翁志焕,王锦艳,蹇锡高*   

  1. (大连理工大学高分子材料系 辽宁省高性能树脂工程技术研究中心 大连 116012)
  • 收稿日期:2007-07-11 修回日期:2007-09-05 出版日期:2008-02-14 发布日期:2008-02-14
  • 通讯作者: 翁志焕

Synthesis and Characterization of the Phosphotungstic Reac-tion-controlled Phase-transfer Catalyst

WENG Zhi-Huan ;WANG Jin-Yan ;JIAN Xi-Gao*   

  1. (Department of Polymer Science and Materials, Dalian University of Technology, Liaoning High Performance Polymer Engineering Research Center, Dalian 116012)
  • Received:2007-07-11 Revised:2007-09-05 Online:2008-02-14 Published:2008-02-14
  • Contact: JIAN Xi-Gao

A trilacunary keggin phosphotungstic reaction-controlled phase-transfer catalyst [C7H7(CH3)3N]9PW9O34(Q9PW9) was synthesized, the catalyst was characterized by FT-IR, 31P NMR, XRD and TG, and the catalytic center was confirmed. The results of analysis indicated that the structure of catalyst was kept well after reaction, the [C7H7(CH3)3N]9PW9O34 (O2)x formed during reaction made the catalyst had the feature of reaction-controlled phase-transfer catalysis. Q9PW9 was applied to the oxidation of benzyl al-cohol with hydrogen peroxide as the oxidant and high efficient catalytic performance was achieved. When the molar ratio of H2O2 to benzyl alcohol was 0.9, the conversion of benzyl alcohol was 86.2%, the selectiv-ity of benzaldehyde was not less than 99%. After the reaction finished, the catalyst could be recycled from the system easily as deposit, and the catalyst recovery ratio was around 86%. The results of the catalyst re-cycle indicated that the catalyst exhibited high stability.

Key words: phosphotungstate, reaction-controlled phase-transfer, hydrogen peroxide, benzyl alcohol, oxidation