含离子液体苯-正丙醇物系等压气液相平衡  

Isobaric vapor-liquid equilibrium for benzene-n-propanol-1-octyl-3-methyl imidazolium acetate ternary system

作　　者：李文秀 王丽达 温情 曹颖 张弢 LI Wen-xiu;WANG Li-da;WEN Qing;CAO Ying;ZHANG Tao(Key Laboratory of Chemical Separation Technology Liaoning Province,Shenyang University of Chemical Technology,Shenyang 110142,Liaoning Province,China)

机构地区：[1]沈阳化工大学辽宁省化工分离技术重点实验室,辽宁沈阳110142

出　　处：《化学工程》2020年第10期58-62,共5页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21576116)。

摘　　要：为了有效地分离苯-正丙醇共沸混合物,并对含有离子液体溶液的非理想性进行研究。文中对101.3 kPa下苯-正丙醇-1-辛基-3-甲基咪唑醋酸盐[OMIM][OAc]三元体系等压气液相平衡数据进行了测试。采用非随机双液体模型(NRTL模型)对实验数据进行了拟合,得到基于NRTL模型的二元交互作用参数。实验结果表明:[OMIM][OAc]的加入对苯-正丙醇共沸体系有显著的盐析作用,苯-正丙醇物系的相对挥发度随着体系中[OMIM][OAc]摩尔分数的增大而增大,当[OMIM][OAc]的摩尔分数为0.02时共沸现象完全消失。因此[OMIM][OAc]作为萃取剂适用于苯-正丙醇共沸物系的分离。In order to separate benzene-n-propanol azeotropic mixture effectively and study the nonideality of the solution containing ionic liquid,the isobaric vapor-liquid equilibrium(VLE)data of the benzene-n-propanol-1-octyl-3-methyl imidazolium acetate([OMIM][OAc])ternary system were measured at 101.3 kPa in this manuscript.The VLE data were fitted by the non-random two-liquid model(NRTL model),and the corresponding binary interaction parameters were obtained based on the model.The experimental results show that the addition of[OMIM][OAc]has a significant salting-out effect on the benzene-n-propanol azeotropic system.The relative volatility of benzene to n-propanol increases with the mole fraction of[OMIM][OAc]increasing.When the mole fraction of[OMIM][OAc]reaches 0.02,the azeotropy is completely broken.Therefore,[OMIM][OAc]is suitable as an entrainer for the separation of benzene-n-propanol azeotrope system.

关 键 词：苯 正丙醇 气液相平衡 离子液体 NRTL模型 

分 类 号：TQ021.2[化学工程]