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.
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