Equilibrium Data of the Biphasic System Poly(ethylene oxide) 4000 + Copper Sulfate + Water at (5, 10, 35, and 45) °C

Abstract

Phase equilibrium data of an aqueous two-phase system composed of poly(ethylene oxide) 4000 + copper sulfate + water were determined at four temperatures, (5, 10, 35, and 45) °C. The phase separation was entropically driven as can be seen by the small influence of temperature on the phase diagram. However, the rise in temperature increased both the tie line length and the slope of the tie line.

(Liquid+liquid) equilibrium of (NaClO4+PEG 4000+H2O) ternary system at different temperatures

“…In figure 3, from (298.15 to 308.15) K, it can be seen that the biphasic area expands with a temperature increase. Similar behaviour was also verified by De Oliveira et al [34] for (PEG 4000 + ZnSO 4 + H 2 O), by Zafarani-Moattar and Sadeghi [6] for (PEG 6000 + Na 2 HPO 4 or NaH 2 PO 4 ), by Mishima et al [5] for (PEG 6000 + K 2 HPO 4 ) and by Voros et al [35] for (PEG 1000 + Na 2 CO 3 ) and (PEG 2000 + Na 2 CO 3 ) aqueous systems.…”

Aqueous Two-Phase Systems of Mixture of Triblock Copolymer (EO)13(PO)30(EO)13 (L64) and Sulfate Salts at Different Temperatures

“…On the other hand, the concentration of copolymer increased in the top phase, and that of the salt increased in the bottom phase. This behavior is in agreement with other different aqueous two-phase systems. − …”

Measurement and Correlation of Phase Equilibria in Aqueous Two-Phase Systems Containing Polyoxyethylene Lauryl Ether and Three Kinds of Potassium Salts at Different Temperatures

“…However, with the increase in the temperature the hydrophobicity of POELE10 enhanced, and then the formation of the ATPS was jointly driven by the salting-out effect of salt and the hydrophobicity of POELE10. Thus the phase-forming ability of whole systems enhanced and the critical concentrations of POELE10 and salt decreased with the increasing temperature, which is consistent with the other polymer–salt ATPSs. ,− …”