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Liquid−Liquid Equilibrium of Aqueous Two-Phase System Composed of Poly(ethylene glycol) 400 and Sulfate Salts

Martins, João Paulo ; Coimbra, Jane S. dos Reis ; de Oliveira, Fabíola Cristina ; Sanaiotti, Guilherme ; da Silva, César A. S ; da Silva, Luis Henrique Mendes ; da Silva, Maria do Carmo H

Journal of chemical and engineering data, 2010-03, Vol.55 (3), p.1247-1251 [Periódico revisado por pares]

Washington, DC: American Chemical Society

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Título:
Liquid−Liquid Equilibrium of Aqueous Two-Phase System Composed of Poly(ethylene glycol) 400 and Sulfate Salts
Autor: Martins, João Paulo ; Coimbra, Jane S. dos Reis ; de Oliveira, Fabíola Cristina ; Sanaiotti, Guilherme ; da Silva, César A. S ; da Silva, Luis Henrique Mendes ; da Silva, Maria do Carmo H
Assuntos: Applied sciences ; Chemistry ; Exact sciences and technology ; General and physical chemistry ; Liquid-liquid equilibria ; Organic polymers ; Phase equilibria ; Physicochemistry of polymers ; Properties and characterization ; Thermal and thermodynamic properties
É parte de: Journal of chemical and engineering data, 2010-03, Vol.55 (3), p.1247-1251
Descrição: Phase diagrams of aqueous two-phase systems (ATPS) composed of 400 g·mol−1 poly(ethylene glycol) (PEG) + sodium sulfate or magnesium sulfate were determined at (298.15, 308.15, and 318.15) K. The temperature effect on the biphasic area was not relevant, indicating a small enthalpic contribution associated with the phase separation. The ability of the salts in inducing the formation of the ATPS with PEG 400 followed the order sodium sulfate < magnesium sulfate. The liquid−liquid equilibrium experimental data were correlated using the NRTL (nonrandom two-liquid) activity coefficient model, and new interaction parameters were estimated. The mean deviations between calculated and experimental compositions were lower than 0.99 %, showing the good descriptive quality and applicability of the NRTL model.
Editor: Washington, DC: American Chemical Society
Idioma: Inglês

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Liquid−Liquid Equilibrium of Aqueous Two-Phase System Composed of Poly(ethylene glycol) 400 and Sulfate Salts

Martins, João Paulo ; Coimbra, Jane S. dos Reis ; de Oliveira, Fabíola Cristina ; Sanaiotti, Guilherme ; da Silva, César A. S ; da Silva, Luis Henrique Mendes ; da Silva, Maria do Carmo H

Washington, DC: American Chemical Society

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