Measurement and correlation of liquid-liquid equilibria of the aqueous two-phase system polyvinylpyrrolidone-sodium dihydrogen phosphate

被引：110

作者：

Zafarani-Moattar, MT ^{[1
]}

Sadeghi, R ^{[1
]}

机构：

[1] Univ Tabriz, Fac Chem, Dept Chem Phys, Tabriz, Iran

来源：

FLUID PHASE EQUILIBRIA | 2002年 / 203卷 / 1-2期

关键词：

liquid-liquid equilibrium; polyvinylpyrrolidone; sodium dihydrogen phosphate; aqueous two-phase system; Flory-Huggins theory; Chen-NRTL model;

D O I：

10.1016/S0378-3812(02)00179-6

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Liquid-liquid equilibrium (LLE) data of the aqueous polyvinylpyrrolidone (PVP)-sodium dihydrogen phosphate system has been determined experimentally at 293.15, 298.15 and 303.15 K. Furthermore, the extended form of the Flory-Huggins and the Chen-NRTL equations with an electrostatic term (the Debye-Mickel and the Pitzer-Debye-Hijckel) were used to correlate the phase behavior of this system. For temperature dependency of the parameters of the Flory-Huggins model a simple equation was assumed. Good agreement was obtained with the experimental data with both models, specially using the model of Chen-NRTL with PDH equation. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：177 / 191

页数：15

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