含离子液体苯-正丙醇体系等压气液相平衡  

Lsobaric vapor-liquid equilibrium for benzene-n-propanol system containing ionic liquid

作　　者：赵思雨 郑馨怡 张弢 ZHAO Si-yu;ZHENG Xin-yi;ZHANG Tao(Key Laboratory of Chemical Separation Technology,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》2021年第5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：选择癸基咪唑醋酸盐([DMIM][OAc])离子液体作为萃取精馏分离苯-正丙醇共沸体系的萃取剂。在101.3 kPa下测定了苯-正丙醇-癸基咪唑醋酸盐三元体系的等压气液相平衡数据,使用非随机双液体模型(NRTL模型)对所得数据进行了关联,得到了模型参数。实验结果表明:[DMIM][OAc]的加入对体系中的苯产生了显著的盐析效应,随着[DMIM][OAc]摩尔分数的增大,盐析效应愈发明显,当[DMIM][OAc]的摩尔分数为0.02时共沸现象完全消失。通过NRTL方程拟合得出最小打破共沸的摩尔分数为0.01045。因此[DMIM][OAc]可以用作分离苯-正丙醇共沸体系的萃取剂。Ionic liquid(IL)decyl imidazole acetate([DMIM][OAc])was selected as the extractant in the extractive distillation of the benzene-n-propanol azeotropic system.The isobaric vapor-liquid equilibrium data of the benzene-n-propanol-[DMIM][OAc]ternary system were measured at 101.3 kPa.The experimental data were correlated by NRTL model,and the corresponding binary interaction parameters were obtained by iterative regression.[DMIM][OAc]has significant salting-out effect on benzenein the system.As the mole fraction of[DMIM][OAc]increased,the relative volatility of benzene to n-propanol increased.When the mole fraction of[DMIM][OAc]reached 0.02,the azeotropic was completely eliminated.The NRTL model calculation shows that the minimum mole fraction of[DMIM][OAc]for breaking the benzene-n-propanol system azeotropy is 0.01045.Therefore,[DMIM][OAc]can be used as an extractant to separate the benzene-n-propanol azeotrope.

关 键 词：苯 正丙醇 离子液体 气液相平衡 NRTL模型 

分 类 号：TQ021.2[化学工程]