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Type: Artigo de periódico
Title: Prediction Of Phase Equilibrium Of Aqueous Two-phase Systems Water + Poly(ethylene Glycol) + Salt
Author: Se R.A.G.
Aznar M.
Abstract: Liquid-liquid extraction by aqueous two-phase systems of the type polymer-salt has been increasing importance in the separation of biomolecules. The thermodynamic behavior of these systems is extremely difficult to model, due to the size differences between the smaller molecules and the polymer. Several activity coefficient models have been proposed, including the combinatorial and free volume effects in one term. This work uses the Elbro-FV model as the combinatorial-free volume contribution of the UNIFAC-Dortmund group contribution model. New group interaction energy parameters for this model have been determined using reported data on the systems water + poly(ethylene glycol) [PEG4000] + salt, where the salts were potassium phosphate and sodium sulfate.
Rights: aberto
Identifier DOI: 
Date Issue: 2001
Appears in Collections:Unicamp - Artigos e Outros Documentos

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