%K Liquids; Phase equilibria; Polyethylene glycols; Polyethylenes; Solvent extraction; Ternary systems; Waterworks, Aqueous two phase system; ASOG; Effect of temperature; Interaction parameters; Liquid liquid equilibrium; Literature data; Sodium citrate; UNIFAC, Sodium compounds %X Liquid-Liquid equilibrium data were obtained for the polyethylene glycol2000(PEG2000)-sodium citrate-water system at 298.15, 308.15 and 318.15 K. The effect of temperature on binodal and tie line data was studied and published in a previous article (Murugesan and Perumalsamy, 2005). The interaction parameters of ASOG and UNIFAC models were estimated using the LLE data of PEG2000-sodium citratewater system and are used to predict the LLE data for PEG6000-sodium citrate-water system at 298.15, 308.15 and 318.15 K (literature data). The predicted LLE data by both ASOG and UNIFAC models showed good agreement with the experimental and literature data. %J Brazilian Journal of Chemical Engineering %L scholars805 %O cited By 5 %R 10.1590/s0104-66322009000100016 %N 1 %D 2009 %V 26 %I Assoc. Brasiliera de Eng. Quimica / Braz. Soc. Chem. Eng. %A M. Pemmalsamy %A T. Murugesan %T Prediction of liquid-liquid equilibria for polyethylene glycol based aqueous two-phase system by ASOG and UNIFAC method %P 171-180