复合催化剂催化合成对羟基苯甲酸正丁酯

摘要

研究了在一水硫酸氢钠复合催化剂存在的条件下,由正丁醇和对羟基苯甲酸高收率合成对羟基苯甲酸正丁酯.探讨了一水硫酸氢钠复合催化剂用量、正丁醇用量和反应时间,带水剂的选择等因素对催化合成对羟基苯甲酸正丁酯收率的影响.实验结果表明,当对羟基苯甲酸、正丁醇和硫酸氢钠的摩尔比为1:2:0.072,助催化剂在0.1 g、带水剂5 mL时,回流分水4 h,酯收率达92.0%,为最佳条件.%N-butyl p-hydroxybenzoate was synthesized with high yield by esterification of n-butyl alcohol with phydroxybenzoic acid in the presence of sodium bisulfate monohydrate and A . The effects of amount of sodium bisulfate monohydrate and A, amount of n-butyl alcohol , amount of water-carring agent and reaction time on the yield of n-butiyl p-hydroxybenzoate were investigated. Ester field of 92. 0％ was obtained under the following condition : molar ratio of p-hydroxybenzoic acid, n-butyl alcohol and sodium bisulface 1 ∶2 ∶0.072, in the presence of the amount of A was 0. 1 g and the amount of water-carring agent was 5 mL,refux for separating water for 4 h.