活性白土负载磷钨酸催化合成乙二醇单乙醚醋酸酯  

Synthesis of Ethylene Glycol Monoether Acetate Catalyzed by Phosphotungstic Acid Supported on Activated Beachingearth

作　　者：梁红冬[1] 苏秋芳[1] 杨爱艳[1] 李木莲[1] 刘春梅[1] 

机构地区：[1]茂名学院化工学院,广东茂名525000

出　　处：《茂名学院学报》2003年第4期27-29,33,共4页Journal of Maoming College

摘　　要：以醋酸和乙二醇单乙醚为原料,活性白土负载磷钨酸作为催化剂,合成了乙二醇单乙醚醋酸酯。考察了不同反应条件对产率的影响。最佳反应条件为:磷钨酸固载量35％、催化剂焙烧温度180℃、催化剂用量为醇醚质量的5％、酸醇摩尔比为1.2:1、带水剂甲苯用量为反应物质量的15％和反应时间为1.5h,产率可达到99％。Ethylene glycol monoether acetate are synthesized from acetic acid and ethylene glycol monoethyl ether with supported phosphotungstic acid catalyst. Beachingearth is used as support. The factors affecting esterification yield are discussed. The optimum conditions for esterification are; the loading amount of phosphotungstic acid, 35% ; baking temperature , 180℃; mass ratio of catalyst to alcohol ether, 5:100; molar ratio of acid to alcohol ether, 1.2:1, mass ratio of toluene to reactants, 15:100; the reaction time 90min, and the yield reached over 99% .

关 键 词：活性白土 负载型催化剂 磷钨酸 催化合成 乙二醇单乙醚醋酸酯 乙二醇单乙醚 溶剂 

分 类 号：TQ225.241[化学工程—有机化工] TQ413.23