Measurement and Correlation of Liquid–Liquid Equilibrium Data for Ternary Systems Water + Acetone + Organic Solvents (Isoamyl Acetate, or Ethyl Butyrate, or 1-Octanol, or 1-Decanol) at 298.15 K and Atmospheric Pressure

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One of the major global challenges today is the management of wastewater, specifically the removal of pollutants that it contains. One of the key challenges in the industrial sector is substituting traditional solvents used in these processes with new, environmentally friendly alternatives as well as replacing conventional, energy-intensive separation methods. This study examines the possibility of acetone extraction using green organic solvents (isoamyl acetate, ethyl butyrate, 1-octanol, and 1-decanol), which are most often used as fragrances. Liquid–liquid equilibrium data for the four ternary mixtures of water + acetone + organic solvents at T = 298.15 K and atmospheric pressure are presented, providing the necessary thermodynamic data for process separation design. Binodal curves were obtained by using the cloud point titration method, while tie lines were determined through refractive index measurements. Distribution coefficients and separation factors were calculated for the immiscibility region. Othmer-Tobias and Hand correlations were used to assess the reliability of the experimental data. The experimental ternary LLE data were correlated using UNIversal QUAsiChemical (UNIQUAC) activity coefficient models. The results confirm that these green solvents are suitable choices for extracting acetone from water.