酸性功能化离子液体催化脂肪族醇酸酯化反应  

ESTERIFICATION OF ALIPHATIC ACID AND ALCOHOL CATALYZED BY ACID FUNCTIONALIZED IONIC LIQUID

作　　者：方东[1,2] 王明顺[2] 钟栋才[2] 李雷[2] 

机构地区：[1]江苏省滩涂生物资源与环境保护重点实验室,江苏盐城224002 [2]盐城师范学院化学化工学院,江苏盐城224002

出　　处：《精细石油化工》2010年第4期12-15,共4页Speciality Petrochemicals

基　　金：江苏省教育厅基础研究计划项目(编号:07KJD530238);江苏省滩涂生物资源与环境保护重点实验室开放基金项目(编号:JLCBE09023)

摘　　要：实验探索了酸性功能化室温离子液体1-甲基-3-丙磺酸基咪唑硫酸氢盐([mimps][HSO_4])催化乙酸、丙酸与乙醇、异丙醇、正丁醇进行醇酸酯化反应的新工艺。考察了反应温度、反应时间、物料比等对酯化反应的影响。结果表明:在优化工艺条件下,乙酸乙酯、乙酸异丙酯、乙酸丁酯、丙酸乙酯、丙酸丁酯的产率分别为82%,86%,87%,72%,83%,化学选择性超过99%,生成的羧酸酯不溶于催化体系,产物与催化体系分层,通过简单的倾析实现产物分离过程。离子液体循环使用10次,催化活性无明显降低。The new method of catalytic esterification reaction for acetic acid and propanoic acid with ethanol, and isopropanol with butyl alcohol in acid functionalized ionic liquid 1-methyl-3-n-propyl sulfonic acid imidazolium hydrogen sulfate （[mimps][-HSO4]） was investigated. The effects of reaction temperature, reaction time, and molar ratio of the reactants on the esterification were explored. Un- der the optimal reaction conditions, the yields of ethyl acetate, isopropyl acetate, butyl acetate, ethyl propionate, and Butyl propionate were 82%, 86%, 87%, 72%, 83%, respectively, and the selectivities were all above 99%. The products were immiscible with [mimps][-HSO4] and could be separated simply By decantation a{ter the reaction. As an environmental benign dual solvent-catalyst, the [mimps][HSO4] could be reused for 10 times without noticeable lowering of activity.

关 键 词：功能化室温离子液体 脂肪醇 脂肪酸 酯化 催化 

分 类 号：TQ426.94[化学工程]