Experimental and correlated liquid-liquid equilibrium data for water + 1,6-hexanediol + 1-pentanol/3-methyl-1-butanol/2-methyl-2-butanol at different temperatures

• Published in: The Journal of chemical thermodynamics Vol. 154; p. 106341
• Main Authors: Yang, Xingchuan, Li, Huanxin, Cao, Chunmei, Xu, Li, Liu, Guoji
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.03.2021
• Subjects: 1,6-Hexanediol; Alcohol; Liquid-liquid equilibria; Thermodynamic models; 1,6-Hexanediol; Thermodynamic models; Alcohol; Liquid-liquid equilibria
• ISSN: 0021-9614; 1096-3626
• DOI: 10.1016/j.jct.2020.106341

•Solubility and LLE data for three ternary systems were measured.•Distribution coefficients and separation factors were calculated.•1-Pentanol and 3-methyl-1-butanol are better solvent than 2-methyl-2-butanol.•Experimental data were correlated by NRTL and UNIQUAC models. Liquid-liquid equilibria (LLE) data for ternary systems of water + 1,6-hexanediol + 1-pentanol/ 3-methyl-1-butanol/ 2-methyl-2-butanol were measured at (293.15, 303.15, 313.15 and 323.15) K under 101.3 kPa. Cloud-point method was applied to determine the solubility curves data. Distribution coefficient and separation factors for 1,6-hexanediol were calculated from the measured tie-line data to evaluate the extraction effect of alcohols on 1,6-hexanediol. The reliability of experimental LLE data were tested by Othmer–Tobias equation and Hand equation, NRTL and UNIQUAC models were applied to correlate the measured data and the calculated results show that both models can fit the experimental data very well.