膜科学与技术

手性salen-Mn(Ⅲ)催化功能陶瓷膜反应器催化性能研究

作者：刘敏，赵之平，鲁鹏，陈康成

单位：北京理工大学化工与环境学院，北京 100081

关键词： salen-Mn(Ⅲ)；手性催化；陶瓷膜反应器；固载；硅烷偶联剂

出版年,卷(期):页码： 2016,36(2):41-47

摘要：

手性salen催化剂是不对称催化反应中的一类先进催化剂，固载化是解决其回收的一种手段。但所报道的超细颗粒基体固载的催化剂的分离仍然有困难，并且非均相催化反应体系传质受限。我们提出了以多孔膜固载催化剂并构建膜反应器的解决思路。本文针对新型手性salen-Mn(Ⅲ)催化功能陶瓷膜反应器的构建，探究了陶瓷膜接枝修饰改性中硅烷偶联剂种类、接枝反应的溶剂和温度，以及催化苯乙烯不对称环氧化反应中氧化剂间氯过氧苯甲酸的用量，催化反应温度等关键因素对膜反应器催化性能的影响。通过XPS分析，证明在陶瓷膜的膜孔道内引入了salen-Mn(Ⅲ)催化剂。在优化反应条件下，膜反应器催化苯乙烯环氧化反应的转化率为21.7%，ee值达43.1%。

Chiral salen catalyst is a kind of excellent catalyst in asymmetric catalytic reactions, and the immobilization of the catalyst is one of the effective methods for its recycling. But the reported immolilizing methods still exists some problems, such as the difficulty in separating the urtrafine particle immobilized catalysts from the reaction mixture, and the mass transfer restriction of the heterogeneous reaction system. The salen-Mn(Ⅲ) catalytic membrane reactor was constructed by immobilizing the catalyst onto porous membrane in our previous work. In this work, the main influence factors on the catalytic properties of the membrane reactor, the kind of silane coupling agents, the kind of solvents and reaction temperature of grafting reaction and the dosage of 3-chloroperbenzoic acid and reaction temperature of the epoxidition of styrene, were studied. The conversion rate and ee values of the epoxidation reaction catalyzed by the membrane reactor were 21.7% and 43.1%, repectively, under the optimized conditions. Salen-Mn(Ⅲ) catalysts have been introduced into the membrane pores, which was proved by the results of XPS analysis.

刘敏(1986-)，女，内蒙古巴彦淖尔市人，博士研究生，从事手性salen催化功能膜反应器的研究。* 通讯联系人：E-mail：zhaozp@bit.edu.cn。

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