Thermodynamic modelling of phase equilibrium for water plus poly(ethylene glycol) plus salt aqueous two-phase systems

被引：29

作者：

Sé, RAG ^{[1
]}

Aznar, M ^{[1
]}

机构：

[1] State Univ Campinas, UNICAMP, FEQ, Sch Chem Engn, BR-13081970 Campinas, SP, Brazil

来源：

BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING | 2002年 / 19卷 / 02期

关键词：

aqueous two-phase systems; liquid-liquid equilibrium; polymers; salts; NRTL model;

D O I：

10.1590/S0104-66322002000200006

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The NRTL (nonrandom, two-liquid) model, expressed in mass fraction instead of mole fraction, was used to correlate liquid-liquid equilibria for aqueous two-phase polymer-salt solutions. New interaction energy parameters for this model were determined using reported data on the water + poly(ethylene glycol) + salt systems, with different molecular masses for PEG and the salts potassium phosphate, sodium sulfate, sodium carbonate and magnesium sulfate. The correlation of liquid-liquid equilibrium is quite satisfactory.

引用

页码：255 / 266

页数：12

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