乙酸-水-甲酸体系的分离研究——酯化-共沸蒸馏精制醋酸

A Study on Separation of Acetic Acid,Water and Formic Acid System——Refinement of Acetic Acid by Esterification-Azeotropic Distillation

以乙酸-水-甲酸三元体系为研究对象,适当选择甲酸的酯化剂,进行该体系的分离实验。结果表明,用酯化-共沸蒸馏可除去乙酸、水和甲酸混合液中的水和甲酸,从而达到精制醋酸的目的。

Separation for the acetic acid-water-formic acid system in a continuous distillation column was studied. The suitable esterification reagents for the dehydration of acetic acid and for removing formic acid from the system are saturated aliphatic alcohols containing 3- 6 carbon atoms. The experimental results obtained indicate that the acetic acid with a higher purity (>9 8. 5%) can be obtained by esterification-azeotropic distillation for the given system.