微波辅助酸性离子液体[Hnmp]HSO_4催化合成水杨酸异丙酯研究  

Microwave assisted synthesis of isopropyl salicylate catalyzed by acidic ionic liquids [Hnmp]HSO_4

作　　者：雷振友 

机构地区：[1]辽宁石化职业技术学院,辽宁锦州121001

出　　处：《粮食与油脂》2016年第2期72-75,共4页Cereals & Oils

摘　　要：设计合成了一种成本较低的酸性离子液体[Hnmp]HSO4,以水杨酸和异丙醇为原料,研究了微波辅助条件下,离子液体[Hnmp]HSO4对水杨酸异丙酯制备反应的催化性能。与常规法相比,微波辅助法在大幅缩短反应时间的同时,还有利于提高产物的收率。采用单因素实验,优化了微波辅助合成水杨酸异丙酯的反应条件,结果表明,当微波反应时间t为25 min,酸醇摩尔比为1∶3,离子液体用量为6%,反应温度T为100℃时,水杨酸异丙酯的收率可达92.3%,且离子液体[Hnmp]HSO4循环使用6次后,产物收率没有明显降低,说明其具有较好的循环使用性能。Acidic ionic liquid [Hnmp]HSO4 was designed and synthesized with low cost, the catalytic performance of [Hnmp]HSO4 on the synthesis of isopropyl salicylate with salicylic acid and isopropyl alcohol as raw materials under the microwave-assisted was studied. Compared with the conventional method, microwave assisted method not only shortened reaction time significantly, but also improved the yield of the product. The reaction conditions of synthesis of isopropyl salicylate assisted by microwave were optimized by single factor experiment, the results showed that the yield could be 92.3% ,t=25 min,n （ salicylic acid ） ： n （ isopropyl alcohol ）=1 ： 3 ,ionic liquid dosage 6% ,T=100 ℃, and the ionic liquid [Hnmp]HSOa could be recycled 6 times with merely slight decrease in the yield of isopropyl salicylate.

关 键 词：微波辅助 离子液体 催化 酯化反应 水杨酸异丙酯 

分 类 号：TS201.2[轻工技术与工程—食品科学]