硅胶负载硅钨酸催化合成丙酸正丁酯  

Catalytic synthesis of n-butyl propionate with H_4SiW_(12)O_(40)/silica gel

作　　者：杨水金[1] 张思诚[1] 邓丽芬[1] 蔡锦凤[1] 

机构地区：[1]湖北师范学院化学与环境工程学院,湖北黄石435002

出　　处：《精细与专用化学品》2011年第10期22-24,共3页Fine and Specialty Chemicals

基　　金：湖北省自然科学基金资助项目(2005AABA053)

摘　　要：以硅胶负载硅钨酸(H_4SiW_(12)O_(40)/硅胶)为催化剂,对以正丁醇和丙酸为原料合成丙酸正丁酯的反应条件进行了研究。较系统地研究了酸醇物质的量比、催化剂的用量、带水剂的用量、反应时间诸因素对酯收率的影响。实验表明,硅胶负载硅钨酸催化剂是合成丙酸正丁酯的良好催化剂,在n(丙酸):n(正丁醇)=1:1.3,催化剂用量为反应物料总质量的0.88%,带水剂环己烷8mL,反应时间45min的优化条件下,丙酸正丁酯的收率可达85.4%。H_4SiW_（12）O_（40）/Silica gel was used as catalyst for the esterification of propionic acid with n-butanol. The effects of the molar ratio of alcohol to propionic acid,the amount of the catalyst,and the reaction time on synthesizing n-butyl propionate were investigated.A suitable condition for synthesizing n-butyl propionate was obtained,that is,the molar ratio of propionic acid to alcohol is 1：1.3,the mass ratio of the catalyst used to the reactants is 0.88%,the volume of cyclohexane as the water-carrying agent is 8mL,and the reaction time is 45min.Under this condition,the yield of n-butyl propionate can reach 85.4%.

关 键 词：丙酸正丁酯 H_4SiW_(12)O_(40)/硅胶 酯化反应 催化剂 

分 类 号：TQ225.241[化学工程—有机化工]