甲基戊烯酮-水-苯酚三元物系液液相平衡数据的测定与关联

Measurement and Correlation of Liquid?Liquid Equilibrium Data of Mesityl Oxide?Water?Phenol Ternary Systems

液液相平衡数据是化工萃取过程设计和模拟计算的基础,为了给以甲基戊烯酮为溶剂的含酚废水萃取过程设计和流程模拟计算提供基础数据,本实验采用平衡法分别测定了25、40和50℃常压下甲基戊烯酮-水-苯酚三元物系液液相平衡数据,并绘出了各温度下的分配系数曲线。同时,采用NRTL活度系数模型对实验数据进行了关联,回归得到了该三元物系的二元交互参数。运用回归得到的模型参数,对该三元物系的相平衡数据进行计算,结果表明该模型可以很好地关联实验数据,模型计算值与实验值的相对均方根误差和绝对平均误差均在1.5%以内。

Liquid-liquid equilibrium data are the basis for design and simulating calculation of chemical extraction processes. In order to provide fundamental data for phenol extraction processes from wastewater, experimental liquid-liquid equilibrium data were determined for the mesityl oxide-water-phenol ternary system at 25, 40 and 50℃ under atmospheric pressure, and the partition coefficient curves were drawn under different temperatures. Meanwhile, the experimental data were correlated with the NRTL activity coefficient model, and binary interaction parameters of the ternary systems were obtained. The predicted data calculated by the regressed parameters show that the experimental data can be successfully correlated with the NRTL model. The relative root mean square deviations（RMSD） and absolute mean deviations（AMD） between calculated and experimental values are both less than 1.5%.