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