Liquid-liquid equilibria and thermophysical properties of ternary mixtures {(benzene / thiophene) plus hexane plus deep eutectic solvents}

In this work, thermophysical properties were determined for understanding of solute-solvent interactions in (aromatics + deep eutectic solvents). The standard partial molar volume (V-phi(0)), partial molar isentropic compressibility (kappa(0)(phi),), and viscosity B-coefficient were determined for the mixtures at dilution region of aromatic compounds. The liquid-liquid equilibria (LLE) for ternary mixtures including (n-hexane + benzene or thiophene + N-formylmorpholine (NFM) or sulfolane (SULF) or diglycolamine (DGA) or deep eutectic solvents (DESs)) were determined at T = (303.15-313.15) K. The performance of the studied solvents or DESs were investigated by distribution coefficient (&BETA) and selectivity (S) in liquid-liquid extraction. The NRTL activity coefficient model was used to correlate LLE data. The experimental results indicate the good performance of DGA-containing DES in comparison with NFM and SULF at the ambient condition. The results of LLE data and calculated thermophysical parameters confirm each other. (C) 2020 Published by Elsevier B.V.