萃取精馏分离乙酸乙酯-异丙醇共沸物系的工艺模拟
Journal of Shenyang Institute of Chemical Technology（2022）
Abstract
采用Aspen Plus,以咪唑类离子液体[BMIM][DBP](1-丁基-3-甲基咪唑磷酸二丁酯)作为萃取剂对乙酸乙酯-异丙醇共沸物系的萃取精馏过程进行模拟和优化.通过灵敏度模型分析工具得到萃取精馏塔的最佳操作条件:[BMIM][DBP]进料量为18 kmol/h,全塔理论塔板数为26,摩尔回流比为0.8,[BMIM][DBP]进料位置为第3块塔板,乙酸乙酯和异丙醇的混合原料进料位置为第9块塔板.基于以上的最佳操作条件,从塔顶得到摩尔分数可达0.999的乙酸乙酯,满足分离要求.结果表明[BMIM][DBP]作为萃取剂在分离乙酸乙酯-异丙醇中具有良好的工业应用前景.
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Key words
Aspen Plus,ethyl acetate,isopropanol,extractive distillation
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