Keggin型多元杂多化合物催化氧化苯甲醇制苯甲醛

化工进展

Keggin型多元杂多化合物催化氧化苯甲醇制苯甲醛

李贵贤，余　华，滕志君，卢有胜，汤　茜

兰州理工大学石油化工学院

出版日期:2010-01-05 发布日期:2010-01-05

Oxidation of benzyl alcohol to benzaldehyde over Keggin type multicomponent heteropoly compounds

LI Guixian，YU Hua，TENG Zhijun，LU Yousheng，TANG Qian

College of Petrochemical Technology，Lanzhou University of Technology

Online:2010-01-05 Published:2010-01-05

摘要/Abstract

摘要： 合成了一系列具有Keggin结构的P-V-Mo-W四元杂多化合物(Cpyr)3+xPVxMoyW12-x-yO40•nH2O [其中，Cpyr=(C16H32C5H4N)+，x=0、1、2和3]，采用傅里叶变换红外光谱和X射线衍射等方法表征了杂多化合物的结构；以磷钒钼钨杂多化合物为相转移催化剂，用m(H2O2)=30%双氧水氧化苯甲醇制备苯甲醛。考察了催化剂的种类、溶剂的类型和反应条件（催化剂用量、反应温度、反应时间、H2O2用量）对苯甲醇氧化反应的影响。在优化条件下，即苯甲醇0.1 mol、催化剂(Cpyr)5PV2Mo5W5O40 0.04 mmol、m(H2O2)=30%H2O2 0.1 mol、在100 ℃反应8 h、溶剂水10 mL，苯甲醇的转化率达88.51%、苯甲醛的选择性达96.06%。

Abstract: Multicomponent heteropoly compounds (Cpyr)3+xPVxMoyW12-x-yO40•nH2O with Keggin structure were synthesized and proved by FTIR and X-ray spectroscopies．With 30% aqueous hydrogen peroxide as oxidant，benzyl alcohol was efficiently oxidized to benzaldehyde over reaction-controlled phase-transfer catalysts (Cpyr)3+xPVxMoyW12-x-yO40. Effects of the type of catalyst，the amount of catalyst and H2O2，the kind of solvent，reaction temperature and time were investigated．Under the optimal conditions，i.e.，with 0.1 mol of benzyl alcohol，0.04 mmol of (Cpyr)5PV2Mo5W5O40 catalyst and 0.1mol of 30% H2O2，reaction temperature 100 ℃，10 mL water as the solvent，88.51% conversion of benzyl alcohol and 96.06% selectivity for benzaldehyde were achieved within 8h．

李贵贤，余　华，滕志君，卢有胜，汤　茜. Keggin型多元杂多化合物催化氧化苯甲醇制苯甲醛 [J]. 化工进展.

LI Guixian，YU Hua，TENG Zhijun，LU Yousheng，TANG Qian. Oxidation of benzyl alcohol to benzaldehyde over Keggin type multicomponent heteropoly compounds[J]. Chemical Industry and Engineering Progree.