Phase diagrams for liquid-liquid and liquidsolid equilibrium of the ternary poly ethylene glycol di-methyl ether 2000 + tri-sodium phosphate + water system at different temperatures and ambient pressure

摘要

Complete phase diagrams for the poly ethylene glycol di-methyl ether 2000 (PEGDME_(2000))+Na_3PO_4+H_2O system at T = (298.15, 308.15 and 318.15) K were determined. Liquidliquid equilibria (LLE) for the aqueous PEGDME_(2000)+Na_3PO_4 system were determined experimentally at T = (298.15, 308.15, 313.15 and 318.15) K. The effects of temperature on the binodals and tie-lines of the investigated aqueous two-phase system (ATPS) were also studied. Furthermore, the modified local composition segment-based NRTL and Wilson models and also osmotic virial equation were used for the correlation and prediction of the liquidliquid phase behavior of the studied system.