LIQUID-LIQUID AND VAPOR-LIQUID-EQUILIBRIA IN WATER PLUS POLY(ETHYLENE GLYCOL) PLUS SODIUM-SULFATE

被引：39

作者：

HAMMER, S ^{[1
]}

PFENNIG, A ^{[1
]}

STUMPF, M ^{[1
]}

机构：

[1] TH DARMSTADT,INST CHEM TECHNOL,PETERSENSTR 20,D-64287 DARMSTADT,GERMANY

来源：

JOURNAL OF CHEMICAL AND ENGINEERING DATA | 1994年 / 39卷 / 03期

关键词：

D O I：

10.1021/je00015a002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this work we have measured liquid-liquid equilibria (LLE) and vapor-liquid equilibria (VLE) in aqueous solutions of poly(ethylene glycol) (PEG) and sodium sulfate. The liquid-liquid equilibria have been determined over a range of polymer molar masses (1550-6000 g/mol), pH values (5.2-8.1), and temperatures (293.15-313.15 K) using a density-sound analyzer. The VLE in the system water + PEG 3000 + sodium sulfate have been measured over the entire homogeneous mixing range at 293.15 and 313.15 K by vapor-pressure osmometry. To demonstrate that the experimental data do not contain any obvious thermodynamic inconsistency, we described VLE and LLE simultaneously using the osmotic virial equation (McMillan, W. G., Jr.; Mayer, J. E. J. Chem. Phys. 1945,13,276) extended with a Debye-Huckel term (Debye, P.; Huckel, E. Z. Phys. 1923, 24, 195, 305. Pitzer, K. S. J. Phys. Chem. 1973, 77, 268).

引用

页码：409 / 413

页数：5

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