Phase equilibria of water + methanol + hexyl acetate mixtures

Journal of Chemical & Engineering Data, 2000

The experimental ternary and quaternary liquid-liquid equilibrium results are reported for the water + cyclohexane + ethyl acetate and water + cyclohexane + ethyl acetate + acetic acid systems at 298.15 K. The ternary results were correlated by using the extended UNIQUAC model with binary and ternary parameters obtained in fitting the model to binary phase equilibria and ternary liquid-liquid equilibrium tie-lines. The quaternary results were predicted using the binary and ternary parameters and further compared with those reproduced by using additional quaternary parameters.

Journal of Chemical and Engineering Data, 1996

Liquid-liquid equilibria for the ternary system water + acetic acid + 1-pentanol were measured over a temperature range of (288 to 323) K. The results were used to estimate the interaction parameters between each of the three compounds for the NRTL and UNIQUAC models and between each of the main groups of H 2 O, CH 2 (paraffinic CH 2 ), OH, and COOH for the UNIFAC model as a function of temperature. The estimated interaction parameters were successfully used to predict the equilibrium compositions by the three models. The NRTL and UNIQUAC models were almost equally good in predicting the overall equilibrium compositions of the studied system. The UNIFAC model satisfactorily predicted the equilibrium compositions. On the basis of this work, the distribution coefficients were also calculated and compared with the experimental values.

Journal of Chemical & Engineering Data, 1995

Vapor-liquid equilibria of methanol + hexyl acetate and ethanol + hexyl acetate mixtures were determined at 101.32 kPa. The data were checked for thermodynamic consistency using Fredenslund's test, correlated using Wilson, NRTL, and UNIQUAC equations for the liquid phase activity coefficients, and compared with the predictions of the group contribution methods UNIFAC and ASOG.

Journal of Chemical & Engineering Data, 2005

In this work, we present the liquid-liquid equilibrium data of a ternary system, water + octane + diethylene glycol monobutyl ether, at 283.15 K, 293.15 K, and 303.15 K under atmospheric pressure. The experimental data were correlated with the UNIQUAC model, and a good agreement was obtained.

Journal of Chemical & Engineering Data, 2011

Liquid-liquid equilibrium (LLE) data of the solubility curves and tie-line compositions were examined of the (water þ ethanol þ linalyl acetate) system at T = (298.2, 308.2, and 318.2) K and P = 101.325 kPa. The relative mutual solubility of ethanol is higher in the water phase than in the linalyl acetate phase. The consistency of the experimental tie lines was determined through the Bachman correlation equation. The experimental LLE data were satisfactorily correlated with the nonrandom two-liquid model (NRTL), and the binary interaction parameters so obtained are reported. The best results were obtained with the NRTL method, using nonrandomness parameter (R = 0.3) for the correlation. Distribution coefficients (D) and separation factors (S) were evaluated over the immiscibility region. The influence of temperature on the LLE characteristics was found to be significant at the temperatures studied.

Fluid Phase Equilibria, 2019

Liquid-liquid equilibrium data and thermophysical properties for ternary systems composed of water, acetic acid and different solvents,

Liquid-liquid equilibria for the ternary systems water + acetic acid + ethyl acetate and water + acetic acid + isophorone (3,5,5-trimethyl-2-cyclohexen-1-one) were measured over the temperature range (283 to 313) K. The results were used to estimate the interaction parameters between each of the three compounds of the systems studied for the NRTL and UNIQUAC models. The estimated interaction parameters were successfully used to predict the equilibrium compositions by the two models; experimental data were successfully reproduced. The UNIQUAC model was the most accurate in correlating the overall equilibrium composition of the studied systems. Also the NRTL model satisfactorily predicted the equilibrium composition. Isophorone experimentally resulted in a better extraction capacity for acetic acid and in a lower miscibility with water.

The Journal of Chemical Thermodynamics, 2013

Liquid-liquid equilibria for the three systems methanol-ethyl ether-cyclohexane, methanoltetrahydrofuran-cyclohexane, and methanol-methyl acetate-cyclohexane were measured at 25°C. For these systems, the applicability of the extended Kretschmer-Wiebeequation was examinedby taking account of both the self-association of methanol and the association of unlike molecules between methanol and polar solvents. For methanol-ethyl ether-cyclohexane system, experimental data gave reasonable agreement with the binodal curve calculated by use of the parameters obtained from binary data alone. For the other two systems, the agreement between experimental and calculated binodal curves were not satisfactory. The NRTLequation was also utilized to calculate the ternary liquid-liquid equilibria from the constituent binary data, but it failed to represent the experimental solubility data.

Journal of Chemical & Engineering Data, 2012

Liquid−liquid equilibria (LLE) data of one quaternary mixture for water + methanol + methylanthranilate (MA) + toluene and two constituent ternary mixtures for the systems (water + MA + toluene) and (water + methanol + toluene) at (298.15, 313.15, and 323.15) K were measured at atmospheric pressure. The reliability of the experimental LLE data was ascertained through Othmer−Tobias and Bachman correlations. The LLE experimental data for the systems were correlated using the universal quasichemical (UNIQUAC) and nonrandom two-liquid (NRTL) models. The average rootmean-square deviations (RMSDs) of the NRTL and UNIQUAC models were 1.257 and 0.997. Both models accurately correlated the experimental tie-line data, while the correlation of the NRTL model was inferior to that of the UNIQUAC model.

Fluid Phase Equilibria, 2002

Liquid-liquid phase equilibria (LLE) for the system of water/tert-butyl alcohol (TBA)/2-ethyl-1-hexanol were investigated experimentally at different temperatures of 298.15, 303.15, 308.15, and 313.15 K. A type 1 liquid-liquid phase diagram was obtained for this ternary system. These results were correlated simultaneously by the UNIQUAC model. The values of the interaction parameters between each pair of components in the system were obtained for the UNIQUAC model using the experimental results. The root mean square deviation (RMSD) between the observed and calculated mole percents was 2.58%. The mutual solubility of 2-ethyl-1-hexanol and water was also investigated by the addition of TBA at different temperatures.