Liquid + liquid equilibrium and thermodynamic modeling of water + cyclohexanone + ethyl acetate at different temperatures

In order to separate and purify cyclohexanone from water, in 101.3 kPa, the liquid-liquid equilibrium (LLE) data of water (1) + cyclohexanone (2) + ethyl acetate (3) at 298.2, 303.2, and 313.2 K were measured. The extraction ability of ethyl acetate was evaluated by distribution coefficient (D) and selectivity factor (S). It was found that the extraction effect was higher at 313.2 K, and the selectivity was better at 298.2 K. At the same time, through comparison with the literature, it is found that mesityl oxide can selectively extract cyclohexanone from water better than ethyl acetate. The NRTL and UNIQUAC models were successfully associated with the LLE data with the root mean square deviation (RMSD) was not greater than 0.27%. Finally, it was verified that the regression parameters of the thermodynamic model have good consistency by GUI-MATLAB tools.