季膦盐离子液体/卤化锌催化CO2环加成反应
Synthesis of Cyclic Carbonate from CO2 and Epoxide Catalyzed by Phosphonium Halides IL-Zinc Halide
姚锐 1王华 1韩金玉 1戎梅竹 1牛宇飞1
作者信息
- 1. 绿色合成与转化教育部实验室,天津大学化工学院,天津300072
- 折叠
摘要
制备了一种由氯化锌和三己基十四烷基季膦盐离子液体组成的Lewis酸/碱复合催化体系,将其用于CO2与环氧烷烃的环加成反应,表现出高催化活性.系统地考察了反应温度、反应压力、反应时间及催化剂组成的影响,结果表明,以[(C6H13)3P(C14H29)]Br/ZnCl2(物质的量之比为2∶1)为催化剂,在CO2压力为2 MPa,反应温度为100℃,反应15 min条件下,碳酸丙烯酯收率达到95％.研究表明该催化体系也适用于CO2与其他环氧化物的环加成反应.最后提出了该催化体系的反应机理.
Abstract
An efficient Lewis acid/base catalyst composed of zinc chloride and trihexyl( tetradecyl) phos-phonium bromide ionic liquid was developed and showed surprisingly high activities for the coupling reaction of CO2 and epoxides. The effects of reaction temperature, CO2 pressure, time and various compositions of the catalyst have been investigated systematically. A high PC yield(95% )could be reached at 100 t with a low CO2 pressure(2 Mpa)for 15 min in the presence of [ (C6H13 )3P(C14H29 ) ] Br/ZnCl2 ( molar ratio is 2: 1). The catalyst was also applicable to the coupling reaction of CO2 and other epoxides. At the end,a possible reaction mechanism of the catalyst was proposed.
关键词
CO2/环氧烷烃/环状碳酸酯/离子液体/季膦盐/卤化锌Key words
carbon dioxide/epoxide/cyclic carbonate/ionic liquid/phosphonium halides/zinc halide引用本文复制引用
基金项目
国家自然科学基金(20776109)
国家自然科学基金(21076152)
教育部高等学校博士学科点专项科研基金(20100032110018)
出版年
2012
NETL
NSTL
维普
万方数据