| Abstract: | Use of the UNIFAC method for the calculation of extraction parameters . In the design of an extraction process not only is a knowledge of the process engineering dependent parameters necessary but also a clear definition of the solvent to be employed and of the necessary processing data. Important quantities include the solubility behaviour of the co-existing phases and the selectivity of the solvent for the component to be extracted. As an incremental method embodying a large number of parameters, the UNIFAC method provides a means of calculating liquid/liquid phase equilibria and partition coefficients in multicomponent systems, even without a knowledge of the experimental data. In this paper the degree of accuracy of the UNIFAC calculation method is demonstrated using ternary water/n-alcohol systems as examples. |
