Experimental Determination and Thermodynamic Modeling of Liquid–Liquid Equilibrium for the Ternary Mixture System: Water + 3-Pentanone + Different Solvents at 308.2 K under 101.3 kPa

Abstract

Ternary liquid–liquid phase equilibrium (LLE) data of water + 3-pentanone + extractants (methyl tert-butyl ether, 2-ethyl-1-hexanol, o-xylene, ethyl acetate) were measured to separate 3-pentanone of high purity from aqueous solutions at 308.2 K under 101.3 kPa. The ability to extract 3-pentanone from aqueous solutions was assessed by distribution coefficient (D) and separation factor (S). Hand and Bachman equations tested the reliability of the experimental data with linear coefficients (R 2) not less than 0.99. Meanwhile, UNIQUAC and NRTL thermodynamic models regressed experimentally measured data to get the optimal binary interaction parameters, and the root mean square deviation (RMSD) was not more than 0.4%. The GUI-MATLAB program verified the consistency of binary parameters obtained from the NRTL model well.

Measurement and Correlation of Liquid–Liquid Equilibrium for the Ternary System 1-Octyl-3-methylimidazolium Tetrafluoroborate + 1-Ethyl-3-methylimidazolium Tetrafluoroborate + Water

“…The NRTL model can correlate the activity coefficients of nonideal solutions containing ionic liquids accurately. − In this work, we also correlated the LLE experimental data of the ternary system [C 8 mim]­[BF 4 ] (1)+[C 2 mim]­[BF 4 ] (2) + H 2 O (3) at 298.15, 308.15, and 318.15 K using the NRTL model. Since the composition of each component in the NRTL model is the mole fraction, we convert the LLE data in Table from mass fraction to mole fraction.…”