Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Experimental liquid-liquid equilibrium (LLE) data for the system ethylene glycolEG+1, 2- butanediol (1,2-BD) + 3- heptanone were measured at atmospheric pressure at 293.15K, 303.15K and 313.15K and the ternary LLE for systems of EG + 1, 2-BD + anisole were also investigated at 303.15K at 101.3KPa by using liquid-liquid equilibrium kettle method. Distribution coefficient and selectivity were obtained and applied to evaluate the extraction capacity of 3- heptanone and anisole. The reliability of the experimental data was confirmed by the Hand correlation and the Othmer-Tobias correlation. The experimental LLE data were correlated by NRTL and UNIQUAC models, and the corresponding parameters were obtained. The root-mean-square deviations (RMSD) between the experimental data and calculated values were less than 1.22%. And topological concepts related to the Gibbs stability test were used to validate the consistency between model parameters and experimental data. The liquid-liquid equilibrium data provide the basic physicochemical properties for design of extraction process of 1,2-BD from EG by 3-heptanone and anisole. And according to integrated correlation coefficient analysis, 3- heptanone is more suitable for the extraction of 1, 2BD from EG than anisole.