Ti-MWW催化烯丙基氯环氧化高效合成环氧氯丙烷  

Highly Efficient Synthesis of Epichlorohydrin by Epoxidation of Allyl Chloride over Titanosilicate Ti-MWW

作　　者：汪玲玲[1] 刘月明[1] 张海娇[1] 吴海虹[1] 蒋咏文[1] 吴鹏[1] 何鸣元[1] 

机构地区：[1]华东师范大学化学系上海市绿色化学与化工过程绿色化重点实验室,上海200062

出　　处：《催化学报》2006年第8期656-658,共3页

基　　金：上海市科学技术委员会(05DZ22306;05JC14069);国家重点基础研究发展计划(973计划)(2006CB202508);新世纪优秀人才支持计划(NCET-04-0423);上海市浦江人才计划(05PJ14041);国家自然科学基金(20473027;20233030);高等学校博士学科点专项科研基金(20050269013)资助项目

摘　　要：研究了具有MWW结构的新一代钛硅分子筛Ti-MWW催化剂对烯丙基氯液相环氧化高效合成环氧氯丙烷的催化性能.结果表明,Ti-MWW的催化活性以及产物选择性均优于传统的钛硅分子筛TS-1.对于Ti-MWW,合适的溶剂为非质子性溶剂丙酮和乙腈,在该溶剂中环氧化物不易发生溶剂化开环反应;而对于TS-1,合适的溶剂是质子性溶剂甲醇,但甲醇可导致醇醚副产物的生成.在Ti-MWW催化剂上烯丙基氯的转化率和环氧氯丙烷的选择性都能达到99%以上.Liquid-phase epoxidation of allyl chloride with hydrogen peroxide was carried out over Ti-MWW, a novel titanosilicate with the MWW structure, to synthesize epichlorohydrin selectively and effectively. Ti- MWW proved to be superior to the conventional TS-1 catalyst in both catalytic activity and product selectivity. Ti-MWW prefers aprotic solvents of acetone and acetonitrile, both of which can restrain the solvolysis of epichlorohydrin, whereas TS-1 favors a protic solvent of methanol. It is possible to achieve the conversion of allyl chloride and selectivity for epichlorohydrin as high as 99 % on Ti-MWW.

关 键 词：钛硅分子筛 Ti—Mww TS-1 烯丙基氯 环氧化 环氧氯丙烷 

分 类 号：O623.11[理学—有机化学]