Vegetable oils can be deacidified by liquid-liquid extraction. The differen
ce in polarity between the triglycerides, the principal components of the o
il, and the solvent guarantees the formation of two phases and permits the
removal of free fatty acids. A knowledge of the equilibrium between the pha
ses of such systems is important, however if adequate equipment for the imp
lementation of the process is to be designed. The present paper establishes
experimental data for systems of canola oil, oleic acid, and alcohols, sub
sequently adjusting the NRTL and UNIQUAC models to them for the calculation
of activity coefficients. The results show the good descriptive quality of
the models.