萃取精馏分离甲基环己烷和甲苯工艺过程的模拟  

Process Simulation of Extractive Distillation for Methylcyclohexane and Toluene System

作　　者：张春勇[1] 郑纯智[1] 唐江宏[1] 张国华[1] 单万建[1] 

机构地区：[1]江苏技术师范学院江苏省贵金属深加工技术及应用重点建设实验室,江苏常州213001

出　　处：《石油化工》2011年第5期532-535,共4页Petrochemical Technology

基　　金：江苏省教育厅高校高新技术产业发展指导性计划项目(JHZD05-036);江苏技术师范学院基金项目(KYX10025)

摘　　要：利用Aspen Plus流程模拟软件,采用双塔流程,以苯酚为萃取剂,对萃取精馏分离甲基环己烷(MC)和甲苯(MB)的过程进行模拟计算,并用实验验证。考察了萃取精馏塔的萃取剂进料位置、原料进料位置、萃取剂与原料的摩尔比(溶剂比)和回流比等因素对分离效果的影响。在满足MC产品的纯度和收率均达到99%的条件下,模拟优化的结果为:理论塔板数为24块,原料在第17块板进料,萃取剂在第5块板进料,溶剂比3.08,回流比5。模拟结果与实验数据吻合较好,说明采用的模拟方法适用于MC和MB混合物萃取精馏过程的模拟。Extractive distillation process for methylcyclohexane （MC） and toluene （ MB ） system was simulated by using Aspen Plus software. Phenol was chosen as the extractant. A process with two columns, namely extractive distillation column and solvent recovery column, was designed for separating the mixture. Effects of the extractant feed position and the mixture feed position on the extractive distillation column, the mole ratio of extractant to feedstock （solvent ratio）, and the reflux ratio on the extractive distillation were investigated. Aimed at the MC mole fraction of 99% in the products and the MC recovery of 99%, the extractive distillation process was simulated to obtain the optimal conditions for the extractive distillation column as follows, number of theoretical plates 24, the mixture feed at 17th plate, the extractant feed at 5th plate, the solvent ratio 3.08 and reflux ratio 5. The extractive distillation simulation result was verified by the experiment data.

关 键 词：ASPEN PLUS软件 模拟 萃取精馏 甲基环己烷 甲苯 

分 类 号：TQ028.1[化学工程]