Experimental data and thermodynamic modeling of ternary aqueous aqueousbiphasic systems of EO/PO polymers¿Na2SO4¿H2O
M. Milosevic (TU Delft - Management in the Built Environment)
KJJ Staal (External organisation)
B Schuur (External organisation)
André de Haan (TU Delft - ChemE/Transport Phenomena)
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Abstract
tLiquid¿liquid extraction using thermoresponsive polymers as solvents in aqueous two phase systemsfollowed by induced phase separation to recover the polymers is a potential technology for water¿saltseparations. Here we report for seven polymers on their ternary systems containing water, sodium sulfateand the (block co)poly ether. Equilibrium data were measured at 298.15 K and 313.15 K and atmosphericpressure. Empirical equations have been used to correlate the experimental equilibria for both temper-atures separately and the semi-empirical NRTL model has been applied with a temperature dependentparameter to describe the complete dataset for both temperatures together. Model predictions were ingood agreement with the experimental data.
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