功能化离子液体室温催化合成乙酸苄酯  

Catalytic Synthesis of Benzyl Acetate in Task-Specific Room Temperature Ionic Liquid

作　　者：方东[1] 刘祖亮[1] 周新利[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《应用化学》2007年第1期85-89,共5页Chinese Journal of Applied Chemistry

摘　　要：制备了N-甲基-N′-磺酸烷基-咪唑阴离子型功能化室温离子液体,研究了功能化室温离子液体(TSILs)于室温下催化乙酸和苯甲醇反应合成乙酸苄酯的新方法,考察了多种TSILs的催化性能。结果表明,所合成的TSILs具有很高的催化活性,乙酸和苯甲醇的摩尔比为1:1．3,在室温下反应2．5 h,乙酸苄酯的产率可达92％,选择性超过99％。由于生成的乙酸苄酯不溶于催化体系,反应产物与催化体系分层,通过简单的倾析便可实现产物分离,简化了分离过程。离子液体可以循环使用,而其催化活性没有明显降低。A new method of catalytic synthesis of benzyl acetate from acetate acid and benzyl alcohol in taskspecific room temperature ionic liquid（TSILs） was studied. Some TSILs with an alkyl sulfonic acid group in a N-methyl imidazlium cation were synthesized for esterification. With 1 ： 1.3 ratio of benzyl alcohol and acetate acid in TSILs for 2.5 h at r. t. , the isolated yield reached to 92% and the selectivity was above 99%. The product was immiscible with TSILs and could be separated simply by decantation after the reaction. As environmentally benign dual solvent-catalysts, the TSILs could be reused for several times without noticeable lowering of activity.

关 键 词：功能化室温离子液体 乙酸苄酯 催化 

分 类 号：O643[理学—物理化学]