乙苯－异丙苯－二异丙苯体系汽液相平衡

VLE OF ETHYLBENZENE-ISOPROPY-LBENZENE-DIISOPROPYLBENZENE

采用拟二元方法处理二异丙苯异构体对实验带来的困难，用改良型Ｄｖｏｒａｋ－Ｂｏｕｂｌｉｋ平衡釜测定了５３．３ｋＰａ压力下乙苯－异丙苯，乙苯－二异丙苯，异丙苯－二异丙苯及乙苯异丙苯－二异丙苯体系的汽液相平衡数据，各对二元数据均通过了热力学一致性检验。用最大似然方法关联实验数据，得出Ｗｉｌｓｏｎ，ＮＲＴＬ和ＵＮＩＱＵＡＣ模型的最佳参数，关联结果令人满意。并用这些参数对三元汽液平衡数据进行了预测，预测值与实验值比较，吻合良好。

LE data of three binary systems comprising of ethylbenzene,isopropylbenzene and diisopropyl-benzene and its ternary system are measured by using a modi fied Dvorak-Bouolik equilibrium still atpressure of 53.3 kPa,and all VLE data of the above binary system pass the thermodynamic consistencecheck.The experimental data are correlated by the maximum-similarity method to obtain the optimalparameters of Wilsion,NRTL and UNIQUAC models,and the results correlated are satisfactory.TheVLE data of the ternary system are predicted by the parameters obtained,the results show that the val-ues predkcted are in better agreement with experimental data.