酸性功能化双核离子液体催化合成酯的研究  

Study of Catalyzed Synthesis of Ester by Acid Functionalized Dacational Ionic Liqiud

作　　者：石月丹[1] 刘春光[1] 王楠[1] 徐凛然[1] 梅楚鹤 郭珊珊[1] 

机构地区：[1]东北电力大学化学工程学院,吉林吉林132012

出　　处：《东北电力大学学报》2014年第6期8-11,共4页Journal of Northeast Electric Power University

基　　金：国家自然科学基金资助项目(21373043)

摘　　要：以自制的双-(3-甲基-1-咪唑)亚丁基二硫酸氢盐离子液体为催化合成了异丁酸异戊酯和丁酸异戊酯,考察了反应条件对酯化率的影响。结果表明,异丁酸异戊酯最佳的合成条件为:醇酸摩尔量比1.2∶1,催化剂用量为2.0 g,反应时间3.5 h,酯化率达到95.4%。丁酸异戊酯最佳的合成条件为:醇酸摩尔量比1.6∶1,催化剂用量为2.0 g,反应时间3.5 h,酯化率达到97.9%。反应结束后反应混合物与催化剂自动分层,采用分液的方式即可分离出催化剂,简化了分离过程。离子液体重复使用6次,催化效果无明显降低。In this issue,bis-（ 3-methyl-1-imidazole） butylidene double bisulfate（ MTEIMHS） was used as a catalyst to synthetize isoamyl isobutyrate and Isoamyl butyrate. The yield of esterification rate under the influence of the reaction conditions was measured. The results showed that under the optimized conditions of isoamyl isobutyrate ： n（ isoamylol） ∶ n（ isobutyric acid） = 1. 2 ∶ 1,catalyst used dosage 2. 0g and 3. 5h,the yield of isoamyl isobutyrate reached 95. 4%. The results showed that under the optimized conditions of Isoamyl butyrate： n（ isoamylol） ∶ n（ butyric acid） = 1. 6∶ 1,catalyst used dosage 2. 0g and 3h,the yield of isoamyl isobutyrate reached 97. 9%. The reaction mixture was immiscible with MTEIMHS and could be speparated simply by separatory funnel after reaction. The ionic liquid catalyst could be reused for 6 times without noticeable lowering of activity.

关 键 词：双核离子液体 异丁酸异戊酯 丁酸异戊酯 催化剂 

分 类 号：O642[理学—物理化学]