新型Lewis酸铁钾矾催化合成乳酸乙酯  

Catalytic Synthesis of Ethyl Lactate by New Lewis Acid Ferric Potassium Alum

作　　者：张福捐[1] 盛淑玲[1] 史礼貌[1] 

机构地区：[1]河南许昌学院化学系,河南许昌461000

出　　处：《酿酒科技》2007年第9期20-21,25,共3页Liquor-Making Science & Technology

基　　金：河南省科技厅自然科学基金项目(0511020500);河南省教育厅自然科学基金项目(200510480008)。

摘　　要：研究了新型Lewis酸铁钾矾的制备,并以该Lewis酸为催化剂,通过乳酸和乙醇反应合成乳酸乙酯,考察了催化剂用量、反应时间、酸醇物质的量比对酯化率的影响。结果表明,新型Lewis酸铁钾矾酸是合成乳酸乙酯的绿色催化剂,最佳反应条件:催化剂用量为0.6g/0.05mol乳酸,反应时间2.0h,酸醇物质的量比为1∶2.3,带水剂15mL,此时酯化率可达96.6%。The preparation of new Lewis acid ferric potassium alum was studied and then ethyl lactate was synthesized from lactic acid and ethyl alcohol with Lewis acid as catalyst. The effects of catalyst use level, reaction time and molar ratio of acid to alcohol on the esterifying rate were investigated. The results indicated that new Lewis acid ferric potassium alum was a green catalyst for the synthesis of ethyl lactate. The optimum reaction conditions were as follows： molar ratio of acid to alcohol was 1：2.3, the use level of catalyst was 0.6 g/0.05 mol lactic acid, water-taking agent was 15 mL, and reaction time was 2.0 h, and the esterifying rate could reach 96.6 %.

关 键 词：催化剂 新型Lewis酸铁钾矾 乳酸乙酯 催化合成 

分 类 号：TQ225.24[化学工程—有机化工]