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以乙酸和异丙醇为原料,硫酸为催化剂,催化合成了乙酸异丙酯。合成试验的最佳反应条件为:第一釜以6摩尔异丙醇为基准,酸醇摩尔比为1.3:1.0,催化剂用量为8ml,全回流和釜底回流相结合,釜底液最高温度111℃,酯收率达到68%;从第二釜起,利用前一釜反应余液作母液,以6摩尔醋酸为基准,酸醇摩尔比为1:1.08,物料平衡达到最佳,酯收率保持在98.4%～101.3%。精馏后,酯纯度达到99.5%以上。该合成精馏方法简便实用。
Acetic acid and isopropanol as raw materials, sulfuric acid as a catalyst, catalytic synthesis of isopropyl acetate. The optimal reaction conditions for the synthesis experiment are as follows: the first reactor is based on 6 moles of isopropanol, the molar ratio of alcohol to alcohol is 1.3: 1.0, the amount of catalyst is 8 ml, the total reflux combined with reflux at the bottom of the kettle, the maximum temperature of the bottom liquid 111 ℃, and the yield of ester reached 68%. From the second reactor, the molar ratio of alcohol to alcohol was 1: 1.08 with 6 mol of acetic acid as the stock solution. Maintained at 98.4% ~ 101.3%. After rectification, the purity of the ester reached above 99.5%. The synthetic distillation method is simple and practical.