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综述了聚乙烯醇和精对苯二甲酸生产过程中分离回收醋酸甲酯的主要方法,并对加盐萃取精馏等盐效分离方法、催化精馏方法和萃取精馏方法进行比较研究。结果表明,加盐萃取精馏方法能分离出高纯度醋酸甲酯,且生产工艺简单,有较好的应用前景。
The main methods for the separation and recovery of methyl acetate during the production of polyvinyl alcohol and refined terephthalic acid are reviewed. Salt extraction efficiency methods such as extractive distillation with salt, catalytic distillation and extractive distillation are compared. The results show that the method of extractive distillation with salt can separate high purity methyl acetate, and the production process is simple and has a good application prospect.