固体超强酸催化合成对羟基苯甲酸乙酯的研究

Research on Synthesis of Ethyl-p-Hydroxyl- Benzoate with Solid Super Strong Acid as Catalyst

以固体超强酸ＳＯ４２－／ＴｉＯ２为催化剂，４Ａ分子筛作脱水剂，合成了对羟基苯甲酸乙酯。应用该方法，酯化反应产率高达８４％，同时对影响产率的诸因素进行了考察，其最佳反应条件为：醇酸摩尔比４∶１，催化剂用量９％，反应时间３ｈ，反应温度１１５～１３５℃。

Ethyl phydroxyl benzoate was synthesized with SO_4^(2-)/TiO 2 as catalyst and 4A molecular sieve as dehydration.Factors influencing yield were discussed.The optimum reaction conditions are alcohol/acid mole ratio 4∶1,catalyst amount 9%,reaction time 3h and temperature 115～135℃.The yield under the optimum conditions was up to 84%.