Experiment and Correlation of Liquid–Liquid Equilibrium Data for Water + 2-Propanol + 1-Octanol or n-Propyl Acetate at 298.2, 308.2, and 318.2 K under 101.3 kPa

The basic liquid–liquid equilibrium data of two systems {water + 2-propanol (IPA) + 1-octanol/n-propyl acetate} were measured. The distribution coefficients of the 2-propanol and the separation factors of the systems were calculated to analyze the extraction ability of the two extractants that extract IPA from water. The correlation model Hand equation was used to fit the data. The value of the linear correlation coefficient R2 > 0.99 indicates that the linear fit of the experimental data is good. The theoretical models NRTL and UNIQUAC were used to correlate the measured data. The deviation between experimental data and simulated data was calculated by the root mean square deviation (RMSD). The RMSD < 0.01 means that the two models were suitable for the regression of the systems studied in this work. GUI-MATLAB has validated the binary interaction parameters. The basic data obtained from this work can support the separation of water and IPA.