Phase equilibrium of aqueous two-phase systems (ATPS) containing triblock copolymer, L64, (EO) 13 (PO) 30 (EO) 13 and sulfate salts were investigated in this work. It was analyzed the effect of the temperature at 278.15 K to 298.15 K and type of salt. The rise of the temperature increased the slope of the tie line (STL). The sodium sulfate showed better capability to induce phase separation.
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