苯、对二甲苯、庚烷、乙二醇、N-甲基吡咯烷酮多组分体系液液平衡的研究

Liquid-Liquid Equilibrium for the Multiphase System of Benzene-p-Xylene-Heptane-1,2-Ethanediol-N-methyl-2-Pyrrolidone

用恒温震荡装置测定了苯、庚烷、乙二醇、N -甲基吡咯烷酮和对二甲苯、庚烷、乙二醇、N -甲基吡咯烷酮 2个四组分体系以及苯、对二甲苯、庚烷、乙二醇、N -甲基吡咯烷酮五组分体系的常压液液平衡数据。用UNIQUAC活度系数方程对相平衡数据进行关联 ,并得到该方程的参数。方程的计算误差表明 ,UNIQUAC方程适用于上述四、五组分体系液液平衡的关联与预测。

Liquid-liquid equilibria of the quaternary systems benzene-heptane-1,2-ethanediol-N-methyl-2-pyrrolidone,and p-xylene-heptane-1,2-ethanediol-N-methyl-2-pyrrolidone,and five-component system p-xylene-benzene-heptane-1,2-ethanediol-N-methyl-2-pyrrolidone,have been determined at 25 ℃.The UNIQUAC model is used to correlate and predict the LLE data of the system and to obtain the model parameters at 25 ℃.A comparison of calculated results is made by root mean square deviations of solubility data.The agreement between calculated and experimental data is satisfactory.