新型酸功能化离子液体中合成对羟基苯甲酸乙酯的研究  

Synthesis of aethylparabenum catalyzed by task-specific acidic ionic liquid

作　　者：谭丰[1] 胡蓉[1] 杨学军[1] 李君杨[1] 

机构地区：[1]西南民族大学化学与环境保护工程学院,四川成都610041

出　　处：《西南民族大学学报（自然科学版）》2008年第2期330-332,共3页Journal of Southwest Minzu University(Natural Science Edition)

摘　　要：以新型Brфnsted酸功能化[Hmim]HSO4为催化剂,由对羟基苯甲酸和无水乙醇合成对羟基苯甲酸乙酯.考察了反应时间、醇酸摩尔比和离子液体用量对酯产率的影响.得到最佳反应条件为:酯化反应时间为2.5h,酸醇摩尔比为1:1.5,离子液体用量为3mL.在此反应条件下,酯化率可达81.5%.并且离子液体可重复使用5次,其催化性能基本保持不变.ρ-hydroxybenzcic acid and dehydrated alcohol are used to synthesize aethylparabenum with novel BrФnsted activated [Hmim] HSO4 as the catalyst. The influences of the reaction period, the mole ratio between alcohol and acid, and the amount of ionic fluid on the ester yield were investigated. The optimized reaction condition is confirmed, according to which the reaction period should be 2.5h, the mole ratio between alcohol and acid should be 1 ： 1.5, and the amount of ionic fluid should be 3ml. Under this optimized condition, the ester yield could achieve 81.5%, and the ionic fluid could be used for 5 times repeatedly without any change of its catalytic efficiency.

关 键 词：离子液体 催化 合成 对羟基苯甲酸 

分 类 号：O621.3[理学—有机化学]