화학공학소재연구정보센터
Fluid Phase Equilibria, Vol.366, 45-56, 2014
Experimental data and thermodynamic modeling of ternary aqueous biphasic systems of EO/PO polymers-Na2SO4-H2O
Liquid-liquid extraction using thermoresponsive polymers as solvents in aqueous two phase systems followed by induced phase separation to recover the polymers is a potential technology for water-salt separations. Here we report for seven polymers on their ternary systems containing water, sodium sulfate and the (block co)poly ether. Equilibrium data were measured at 298.15 K and 313.15 K and atmospheric pressure. Empirical equations have been used to correlate the experimental equilibria for both temperatures separately and the semi-empirical NRTL model has been applied with a temperature dependent parameter to describe the complete dataset for both temperatures together. Model predictions were in good agreement with the experimental data. (C) 2014 Elsevier B.V. All rights reserved.