硫酸氢钾催化合成肉桂酸乙酯

应用硫酸氢钾催化内桂酸与乙醇的酯化反应，合成了内桂酸乙酯。研究结果表明，硫酸氢钾具有较高的催化活性。考察了内桂酸／乙醇摩尔比、催化剂用量、反应时间对酯产率的影响，以及催化剂的重复使用性能。在典型反，条件（内桂酸／乙醇／硫酸氢钾的摩尔比=1：19：0．74，回流3h）下，所得肉桂酸乙酯的产率为97．1％。该催化剂易于回收且可重复使用。

Catalytic synthesis of ethyl cinnamate with potassium bisulfare

Ethyl Cinnamate was synthesized by the esterifiestion of ethyl alcohol with cinnamic acid in the presence of potassium bisulfate monohydrate. The results obtained showed that the potassium bisulfate monohydrate consisted of a fairly high catalytic activity of the esterification reaction .The effects of cinnamic acid and ethyl alcohol molar ratio, the amount of potassium bisulfate monohydrate catalyst applied, and the time of reaction on the yield of ethyl cinnamate and catalysis activity of catalysts reused have been surveyed, In the chemical reaction of the typical condition, the ester yield which was synthesized reached 97.1%(the molar ratio of cinnamic acid/ethyl alcohol/potassium bisulfate=1:19:0.74,refluring 3h).bisulfate monohydrate catalyst can be easily recovered and reused.