摘要
研究了以对羟基苯甲酸、乙醇为原科,氨基磺酸为催化剂,合成对羟基苯甲酸乙酯,并讨论了催化酯化的影响因素.实验结果表明,磺酸是合成对羟基苯甲酸乙酯的良好催化剂,易回收,可重复使用.最佳工艺条件为:酸醇物质的量比为1∶4,催化剂用量为反应物料总质量的10.3%,反应时间为3h,回流温度,此条件下,产品收率达90.38%.
The preparation of ethyl p-hyclroxybenzonate by the reaction of p- hyclroxybenzonate acid with ethanol, by using aminosulfonic acid as a catalyst, and its various factors that effect the esterification have been discussed. It proves that the catalyst is an excellent catalyst for the synthesis of ethyl p-hyclroxybenzonate, feasible to be used repeatedly, and less pollution to environment. The optimum reaction conditions are the molar of the acid to ethanol 1：4, the amount of catalyst to the total 0. 103：1 （the reaction time： 3 hours）. With reflux temperature, under these conditions, product recovery rate is 90. 38%.
出处
《渭南师范学院学报》
2005年第5期5-7,共3页
Journal of Weinan Normal University
基金
咸阳师范学院自然科学基金重点资助项目(04XSYK005)
关键词
对羟基苯甲酸乙酯
催化剂
合成
氨基磺酸
ethyl p-hyclroxybenzonate
catalyst
synthesis
aminosulfonic acid
