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

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 ofhigh purity from aqueous solutions at 308.2 K under 101.3 kPa. Theability to extract 3-pentanone from aqueous solutions was assessedby distribution coefficient (D) and separation factor(S). Hand and Bachman equations tested the reliabilityof the experimental data with linear coefficients (R (2)) not less than 0.99. Meanwhile, UNIQUAC and NRTL thermodynamicmodels regressed experimentally measured data to get the optimal binaryinteraction parameters, and the root mean square deviation (RMSD)was not more than 0.4%. The GUI-MATLAB program verified the consistencyof binary parameters obtained from the NRTL model well.