机构地区: 湖南城市学院化学与环境工程系
出 处: 《信阳师范学院学报(自然科学版)》 2003年第2期203-205,212,共4页
摘 要: 应用一水硫酸氢钠催化正丁醇与对羟基苯甲酸的酯化反应,合成了对羟基苯甲酸丁酯.研究结果表明,硫酸氢钠具有较高的催化活性.考察了对羟基苯甲酸/正丁醇摩尔比、催化剂用量及反应时间对酯产率的影响.在典型反应条件(对羟基苯甲酸/正丁醇/硫酸氢钠的摩尔比=1∶2∶0.072,回流分水5h)下,所得对羟基苯甲酸丁酯的产率为92.8%.该催化剂易于回收且可重复使用. nbutyl phydroxybenzoate was synthesized by the esterification of nButyl alcohol with phydroxybenzoic acid in the presence of sodium bisulfate monohydrate. The results obtained indicate that sodium bisulfate monohydrate possesses a fairly high catalytic activity for the esterification reaction. The molar ratio of phydroxybenzoic acid/nbutyl alcohol and the effect of the amount of catalyst used and the reaction time on the yield of ester have been studied. The yield of the ester obtained under the typical reaction conditions (phydroxybenzoic acid/nbutyl alcohol/ sodium bisulfate = 1 mol/ 2 mol /0.072 mol, refluxing and watersegrating for 5 h) is 92.8%. Sodium bisulfate monohydrate catalyst can be easily recovered and reused.