SBA-15固载离子液体在碳酸丙烯酯水解反应中的应用  

Application of SBA-15 Immobilized Ionic Liquid in Hydrolysis of Propylene Carbonate

作　　者：郭建平[1] 唐斌艳[1] 陈欣[1] 曾海浪 毛丽秋[1] 

机构地区：[1]湖南师范大学化学化工学院,长沙410081

出　　处：《科技导报》2014年第14期19-23,共5页Science & Technology Review

基　　金：湖南省科技计划项目(2006JT2009;2011GK2005)

摘　　要：为寻找一种用于制备1,2-丙二醇(PG)的更有效简单的离子液体,通过在咪唑阳离子上引进碱性基团,合成了具有一个碱性位点的咪唑类离子液体,并将其固载到介孔分子筛SBA-15上,制得功能化三乙胺固载离子液体材料。采用红外、热重、X射线衍射、透射电镜、N2吸附-脱附等测试技术对催化剂进行了表征。通过表征分析可知,与纯硅SBA-15相比,固载催化剂的比表面积、孔容和孔径有一定程度的减小。考察了其在碳酸丙烯酯水解反应中的催化活性,在有足够水的条件下,反应温度140℃、催化剂的用量为3%(质量分数)、反应时间为2 h时,取得最好的催化效果,选择性和产率均大于99%,同时该催化剂具有重复使用性。With introduction of basic groups in the imidazole cation, the imidazole functional ionic liquid with an alkaline site was synthesised, which was immobilized on mesoporous molecular sieve SBA- 15, and functionalized triethylamine immobilized ionic liquid material was obtained. The catalyst was characterized by FT-IR, TG-DTG, X-ray diffraction, transmission electron microscopy, N2adsorption-desorption methods. Analysis by characterization showed that the immobilized catalyst surface area, pore volume and pore diameter decreased compared with those of pure silica SBA-15. The catalytic activity of the catalyst was investigated in the hydrolysis reaction of propylene carbonate, under conditions of enough water, reaction temperature of 140℃, the amount of catalyst 3%, and reaction time 2 h, where the best catalytic effect was obtained. The selectivity and yield were more than 99%, and the catalyst was reusable.

关 键 词：离子液体 固载催化剂 1 2-丙二醇 

分 类 号：O643.32[理学—物理化学]