基于醋酸异丙酯-甲醇共沸体系的特性分析，提出热集成变压精馏技术分离醋酸异丙酯-甲醇的工艺方法。利用Aspen Plus模拟软件，以醋酸异丙酯-甲醇的质量分数为约束变量，过程能耗最低为目标函数，采用优化分析工具，得到了模拟流程的理论塔板数、进料位置、回流比等优化工艺参数。在此条件下，得到质量分数不低于0.998的醋酸异丙酯和甲醇产品，回收率均达到99.9%以上。与传统变压精馏工艺相比，采用高压塔的塔顶气相潜热作为常压塔再沸器热源的热集成变压精馏工艺节能率达41.05%。

Based on the characteristics analysis on the isopropyl acetate-methanol azeotropic system,the heat integration pressure swing distillation technology is proposed to separate isopropyl acetate-methanol mixtures.The optimum simulation is performed by using the RadFrac pattern of Aspen Plus,aiming at minimizing the energy consumption at fixed purities of isopropyl acetate and methanol.The optimal process parameters such as the total number of theoretical plate,feeding position and reflux ratio are specified by using optimizing analysis tools.Under the optimal parameters,the isopropyl acetate and methanol products both with a mass fraction of more than 0.998 can be obtained,and the yields can exceed 99.9%.Compared with traditional pressure swing distillation process,the heat integration pressure swing distillation process can save energy by 41.05% via using the gas phase potential heat at the top of the high pressure tower as the heat source for the reboiler of the atmospheric pressure tower.

刘艳杰(1969-),女,硕士,教授,研究方向为化工过程产品开发与化工过程模拟,yanjieliu2009@126.com