正十二烷+联苯+萃取剂三元液液相平衡实验测定及预测  

Experimental determination and prediction of ternary liquid-liquid equilibrium for n-dodecane+biphenyl+extractant

作　　者：孙天一 梁智 李佳书 丁延 李进龙 Sun Tianyi;Liang Zhi;Li Jiashu;Ding Yan;Li Jinlong(School of Petrochemical Engineering,Changzhou University,Changzhou Jiangsu 213164,China)

机构地区：[1]常州大学石油化工学院,江苏常州213164

出　　处：《石油化工》2022年第10期1188-1195,共8页Petrochemical Technology

基　　金：国家自然科学基金项目(21878025,22078026)。

摘　　要：实验测定了常压、温度为303.15,323.15,343.15 K条件下,正十二烷+联苯+有机萃取剂的三元液液相平衡数据。借助分配系数和选择性系数,评价了二甲基亚砜(DMSO)、N,N-二甲基甲酰胺(DMF)和糠醛对联苯的萃取效果。实验结果表明,相同温度下,不同萃取剂对联苯的分配系数遵循DMF>糠醛>DMSO规律,三者选择性系数DMSO最高。采用NRTL和UNIQUAC热力学模型成功关联了实验数据,获得了新的二元相互作用参数。借助UNIFAC和COSMO-SAC模型预测了不同萃取剂对联苯的萃取效果,除COSMO-SAC模型对DMF体系不能获得分相结果外,预测结果与实验结果趋势一致。The ternary liquid-liquid equilibrium data of n-dodecane+biphenyl+organic extractant at 303.15,323.15,343.15 K and ambient pressure were determined.The extraction effect of dimethyl sulfoxide(DMSO),N,N-dimethylformamide(DMF)and furfural to biphenyl was evaluated with the aid of partition coefficient and selectivity coefficient.The experimental results show that the partition coefficients of biphenyl with different extractants at the same temperature follows the order of DMF>furfural>DMSO,and the selectivity coefficient of DMSO is the highest.The experimental data are successfully correlated with NRTL and UNIQUAC thermodynamic models,and new binary interaction parameters are obtained.The extraction effects of different extractants to biphenyl are predicted using UNIFAC and COSMO-SAC model,and the trend is consistent with the experimental results except for the mixture containing DMF by COSMO-SAC model.

关 键 词：液液相平衡 联苯 正十二烷 萃取剂 COSMO-SAC模型 

分 类 号：TQ028[化学工程]