用NRTL方程关联和预测离子液体-醇-水体系的液液相平衡

Correlation and prediction of liquid-liquid phase equilibrium of ionic liquid-alcohol-water systems with NRTL equation

Ionic liquids have received increasing attention for their potential uses as non-wolatile separation and reaction solvents, and the liquid-liquid equilibrium（LLE）of ionic liquid containing systems is of great importance for such practical applications.The NRTL（non-random two liquid）equation was extended and used in this paper for the calculation of the LLE data of some ionic liquid-alcohol binary systems.It was found that the extended NRTL model could be accurately used to represent the LLE of these ionic liquid-alcohol systems with the average absolute deviations lower than 0.6%.The LLE data of two ternary systems, H2O-n-butanol-[bmim]PF6 and H2O-n-butanol-[omim]PF6, were further successfully predicted for the first time by using the NRTL binary parameters.

Ionic liquids have received increasing attention for their potential uses as non-volatile separation and reaction solvents, and the liquid-liquid equilibrium （LLE） of ionic liquid containing systems is of great importance for such practical applications. The NRTL （non-random two liquid） equation was extended and used in this paper for the calculation of the LLE data of some ionic liquid-alcohol binary systems. It was found that the extended NRTL model could be accurately used to represent the LLE of these ionic liquid-alcohol systems with the average absolute deviations lower than 0. 6 %. The LLE data of two ternary systems, H2O-n-butanol-[-bmim] PF6 and H2O n-butanol-[omim] PF6, were further successfully predicted for the first time by using the NRTL binary parameters.