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

Brazilian Journal of Chemical Engineering

卷:19

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

DOI  :  10.1590/S0104-66322002000200006

来源: DOAJ

【 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.

【 授权许可】

Unknown