Liquid− liquid equilibrium for systems of (corn oil+ oleic acid+ methanol or ethanol) at (303.15 and 313.15) K

Abstract

Liquid-liquid equilibrium data for the systems {corn oil + oleic acid + methanol} and {corn oil + oleic acid + ethanol} at (303.15 and 313.15) K are reported. The experimental liquid-liquid data were correlated using the UNIQUAC activity coefficient model, and the relevant parameters are presented. The experimental and calculated compositions of the equilibrium phases were compared, and the relative mean square deviations (rmsd) are reported. The results indicate applicability of the UNIQUAC activity coefficients model for liquid-liquid equilibrium calculations of the studied mixtures. The distribution coefficients and the selectivity factors of methanol and ethanol for the extraction of oleic acid from (corn oil + oleic acid) mixtures were calculated and presented. From our experimental and calculated results, we conclude that increasing the temperature causes an increase in the distribution coefficient but a decrease in the selectivity factor; therefore, considering economic and practical aspects, room temperature may be optimum for extraction of oleic acid from corn oi