Liquid-liquid equilibrium data measurement and thermodynamic modelling for ternary mixtures composed of water, diethylene glycol dimethyl ether and different solvents at 298.2 K. (February 2022)

• Record Type: Journal Article
• Authors: Jiang, Yueyang; Lin, Song; Yan, Houchun; Guo, Hongyue; Li, Qingsong
• Is Part Of: Journal of chemical thermodynamics. Volume 165(2022)
• Publication Date: 2022-02
• Subjects: Liquid-liquid equilibria -- Diethylene glycol dimethyl ether -- Extraction -- Thermodynamic models; Thermodynamics -- Periodicals; Thermochemistry -- Periodicals; Thermodynamique -- Périodiques; Thermochimie -- Périodiques; Thermochemistry; Thermodynamics; Periodicals; 541.369
• DOI: 10.1016/j.jct.2021.106669
• Languages: English
• ISSNs: 0021-9614

Abstract

Highlights: The LLE data for water + diethylene glycol dimethyl ether + solvents were measured. The distribution coefficient and separation factor were calculated. The reliability of LLE data were verified by the Othmer-Tobias and Hand equations. The NRTL and UNIQUAC models were applied to correlate the LLE data. The binary interaction parameter values were obtained from the data correlation. Abstract: Liquid-liquid equilibrium (LLE) data for water + diethylene glycol dimethyl ether + {methyl isobutyl carbinol, methyl isobutyl ketone, methyl isopropyl ketone, methyl tert -butyl ether, n -octanol and 2-ethyl-1-hexanol} was measured at 298.2 K under 101.3 kPa. The effect of separating diethylene glycol dimethyl ether from water is evaluated by the distribution coefficient and the separation coefficient. The Othmer-Tobias and Hand equations were chosen to examine the experimental LLE data. Meanwhile, the data was correlated by the NRTL and UNIQUAC thermodynamic models with AAD % less than 0.55 and RMSD % less than 0.77. The separation performance of six solvents was compared using the σ -profile analysis via the exploration of the intermolecular interaction.