摘要
以对羟基苯甲酸和甲醇在氨基磺酸催化下反应得到对羟基苯甲酸甲酯。通过响应曲面法优化了反应的条件,得到对羟基苯甲酸甲酯合成的最佳工艺为(以对羟基苯甲酸为0.1mol为准):醇与酸的摩尔比为5.3,氨基磺酸投加量为2.3g,反应时间为6h 20min,反应温度为65℃。在此最佳条件下,产率可达90.5%。
Methylparaben is synthesized by hydroxybenzoic acid and methanol under the catalytic reaction of sulfamic acid. Response surface methodology is used to optimize the reaction conditions, the best process methylparaben synthe- sis is as follows (take p- hydroxybenzoic acid of 0. lmol as basis) : the molar ratio of methanol and hydroxybenzoic acid is 5. 3, the dosage of sulfamic acid 2. 3g, the reaction time is 6h 20min, the reaction temperature is 65℃. Under the optimal conditions, the yield is 90. 5%.
出处
《中国食品添加剂》
CAS
北大核心
2014年第1期157-162,共6页
China Food Additives
基金
国家自然科学基金面上项目编号:No.21176148
陕西省轻化工助剂重点实验室项目编号13J017