加盐萃取精馏分离邻二甲苯-间二甲苯的研究  

Separation of o-xylene and m-xylene by extractive distillation with salt

作　　者：杨玉敏[1] 胡洁[1] 郝丛[1] 张少丹[1] 

机构地区：[1]邢台学院化学工程与生物技术学院,河北邢台054001

出　　处：《现代化工》2016年第4期173-175,共3页Modern Chemical Industry

摘　　要：研究了萃取剂的种类、用量和盐的种类及用量对萃取精馏的影响。研究结果表明,当采用二甲基亚砜作为萃取剂时,其用量与体系溶液体积比为0.5∶1时,盐为醋酸钾时,质量分数为4%时,相对挥发度可以达到1.502。用Aspen软件模拟,通过模拟计算及优化,模拟结果表明,当1号塔塔板数为53块,回流比为8;2号塔塔板数为10,回流比为9,分离得到的邻二甲苯和间二甲苯质量分数可以达到0.95。The effects of the type and amount of the solvent and slat on extractive distillation are studied. The results show that the relative volatility can reach 1. 502 under the following conditions： DMSO as the extraction agent,0. 5∶ 1 of the ratio of DMSO and the system solution,and 4% mass fraction of potassium acetate as the salt. The simulations for the process are performed by Aspen Plus. The simulation results show that the mass of fraction of m-xylene and o-xylene can reach up to 0. 95 under the operating conditions： 53 of the theoretical plates for No. 1 column with a reflux ratio of 8,and 10 of theoretical plates for No. 2 column with a reflux ratio of 9.

关 键 词：间二甲苯 相对挥发度 萃取 

分 类 号：TQ24[化学工程—有机化工]