Abstract
In this study, liquid-liquid equilibria (LLE) of sunflower oil, ethanol and water have been studied at temperature range of (298.15-340.15) K. The experimental measurements were carried out for one type of vegetable oils of sunflower oil in a glass equilibrium cell at a number of fixed temperatures at atmospheric pressure. The modeling of the experimental data was based on considering one pseudo-component for the vegetable oil. The experimental data were modeled using the UNIQUAC, three-parameter NRTL and six-parameter NRTL models. The modeling could correlate correctly the experimental data. The standard deviations between calculated and experimental mass fractions for the UNIQUAC, three-parameter NRTL and six-parameter NRTL models were 0.312%, 0.529%, 0.307%, respectively. These standard deviations show that the above-mentioned models have ability to correlate such complex systems. The six-parameter NRTL had better calculated mass fractions.
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