水-乙醇-甲基异丁基甲酮体系液液相平衡数据的测定与关联  

Measurement and correlation of liquid-liquid equilibrium data for water-ethanol-methyl isobutyl ketone

作　　者：常春[1] 常俊丽[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001

出　　处：《化学工程》2014年第5期39-41,60,共4页Chemical Engineering(China)

基　　金：国家自然科学基金资助项目(21176227);河南省教育厅科学技术重点研究项目(14A530002)

摘　　要：在常压下测定了水-乙醇-甲基异丁基甲酮体系在308.15,318.15,328.15 K的液液相平衡数据。用Hand方程和Othmer-Tobias方程对实验数据进行拟合,结果表明:Hand方程拟合效果优于Othmer-Tobias方程。采用NRTL模型和UNIQUAC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;并对此物系的相平衡数据进行了预测,由模型计算值和实验值的均方根偏差知,NRTL模型能更好地与实验数据吻合。The liquid-liquid equilibrium（ LLE） data for the ternary system of water-ethanol-methyl isobutyl ketone at 308. 15,318. 15,328. 15 K were measured under atmospheric pressure. The reliability of experimental LLE data was ascertained through Hand and Othmer-Tobias equations. It shows that Hand equation is better than Othmer-Tobias equation to fit the experimental data. The activity coefficient models of universal quasi-chemical（ UNIQUAC） and nonrandom two-liquid（ NRTL） were used to correlate the data of the investigated system by Aspen Plus. With the parameters obtained from the two models,the compositions of LLE were compared with the corresponding experimental data. The results reveal that the calculated values from NRTL models agree well with the experimental values.

关 键 词：液液平衡 甲基异丁基甲酮 NRTL UNIQUAC 

分 类 号：O642.42[理学—物理化学]