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
收藏
页码：255 / 266
页数：12
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