硫酸高铈改性离子交换树脂催化合成尼泊金丁酯

Synthesis of butyl paraben catalyzed by modified strong acid cation ion exchange resin by cerium sulfate

首次采用硫酸高铈与阳离子交换树脂反应制备的改性离子交换树脂为催化剂合成尼泊金丁酯。考察了催化剂用量、醇酸物质的量比、反应时间及带水剂等因素对收率的影响。结果表明,该催化剂具有催化活性高、后处理方便,废液排放量少等优势。最佳反应条件为:醇酸物质的量比3,催化剂0.5 g,反应时间5 h,收率达93.1%。

Strong acid cation ion exchange resin catalyst modified by cerium sulfate, P-hydroxybenzoic acid and n-butyl alcohol reacted to form butyl paraben. The factors influencing the yield were discussed, including amount of catalyst, the mole ratio of reactants, reaction time and so on. The experimental results showed that p-hydroxybenzoic acid 0.05 tool, molar ratio of alcohol to acid 3 ： 1, the catalyst 0.5 g and reaction time 5 h, the yield can reach 93.1%. It was the efficient, economic and environmental friendly catalyst.