期刊论文

中文

食品工业科技

1002-0306

2003

24

3

56-57

10.3969/j.issn.1002-0306.2003.03.023

湖南省自然科学基金资助课题（00JJY20110）； 湖南省教育厅科研基金资助课题（01C022）。；

本校为第一机构

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,合成了尼泊金丁酯.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,所得尼泊金丁酯的产率为92.8%.该催化剂易于回收,且可重复使用.

n -butyl p -hydroxybenzoate was synthesized by the esterification of n -Butyl alcohol with p -hydroxybenzoic acid in the presence of sodium bisulfate monohydrate.The results obtained indicated that sodium bisulfate monohydrate possessed a fairly hig h catalytic activity for the esterification reaction.The effects of p -hydroxybenzoic acid /n -butyl alcohol molar ratio,the amount of sodium bisulfate monohydrate catalyst used and reaction time on the yield of n -butyl p -hydroxybenzoate have been investig ated.The yield of the ester obtained under the typical reaction conditions (p -hydroxybenzo...