固体超强酸S_2O_8^(2-)/ZrO_2-Al_2O_3催化合成对羟基苯甲酸乙酯

Synthesis of Ethyl p-Hydroxybenzoate with the Solid Superacid S_2O_8^(2-)/ZrO_2-Al_2O_3

报道了一种以对羟基苯甲酸和乙醇为原料合成对羟基苯甲酸乙酯的新方法 ,即在固体超强酸S2 O2 -8/ZrO2 -Al2 O3 催化下 ,用分子筛作脱水剂 ,采用索氏提取器进行回流脱水直接酯化。并考察醇酸比、反应时间。

The paper presents a new synthetic method of ethyl p-hydroxybenzoate with acid and ethanol. The experiment was carried out with solid superacid S 2O 2- 8/ZrO 2 -Al 2O 3 as catalysts,the dehydration by molecular sieve and using soxhelt extraction apparatus. The influence of reactants on the yield of estes is also investigatedm terms of the melar ratio of ethanol to p-hydroxybenzoatic acid, the amount of catalyst used and the reaction time .