Correlation of liquid-liquid equilibria for alkane+methanol+aromatics ternary systems by using modified wilson equation with parameters estimated from pure-component properties

A useful model has been proposed to calculate liquid-liquid equilibria (LLE) of non-aqueous ternary systems,which are classified as type I (only one pair among binary systems is partially miscible),based on a modified Wilson equation. The modified Wilson equation adopted contains the interaction energy parameters of constituent binary systems and the multi-component parameter for the ternary system concerned. In this study,a simple procedure has been developed to estimate those parameters from normal boiling points and solubility parameters which can be obtained by a groupcontribution method. Therefore,LLE of ternary systems can be calculated by using pure-component properties alone. The procedure has been adopted for various alkane+methanol+aromatics ternary systems and good correlation performances are obtained. No. 10 2016.