硫酸氢钠催化合成乙酸乙酯的工艺研究

The Study on Synthesis Teclmology of Ethyl Acetate Catalyzed by Sodium Bisulfate

以硫酸氢钠为催化剂,乙酸与乙醇为原料合成了乙酸乙酯,讨论了酸醇物质的量比、催化剂用量、反应时间、带水剂等因素对酯化率的影响,确定了最佳工艺条件为:以0.2mol乙醇为基准,酸醇物质的量比为1.5:1,催化剂用量为1.5g,反应时间为2h,带水剂环己烷为10mL,乙酸乙酯的酯化率为85.2%。该催化剂具有催化效果好,使用量少,酯化率高,能够重复使用,环境污染小,腐蚀性小,价格低廉易得等特点,是一种很有发展前景的催化剂。

With sodium bisulfate as the catalyst, and acetic acid and alcohol as raw materials, ethyl acetate was synthesized. The effects of the reaction time, amount of catalyst, molar ratio of acid to alcohol and water carrying agent on esterification rate were discussed and the optimal reaction conditions were obtained as follows： based on 0.2 mol alcohol, the molar ratio of acetic acid to alcohol was 1.5： 1, the amount of catalyst was 1.5 g , reaction time was 2h, and cyclohexane was 10 mL. Under these conditions, the highest yield of the reaction could reach 85.2%. Sodium bisulfate was a highly active catalyst for this reaction, less amount was required. And it was less pollution and corrosion, cheap, the esterification rate was high and it could be recycled, so it had a good developing foreground.