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BIBTEX RIS

Liquid–Liquid Equilibria of an Aqueous Two-Phase System Containing Poly(ethylene) Glycol 1500 and Sulfate Salts at Different Temperatures

2007; American Chemical Society; Volume: 53; Issue: 1 Linguagem: Inglês

10.1021/je700538z

ISSN

1520-5134

Autores

João Paulo Martins, Carolina de Paula Carvalho, Luís Henrique Mendes da Silva, Jane Sélia dos Reis Coimbra, Maria do Carmo Hespanhol da Silva, Guilherme Dias Rodrigues, Luís Antônio Minim,

Tópico(s)

Crystallization and Solubility Studies

Resumo

Phase diagrams of aqueous two-phase systems composed of poly(ethylene) glycol (PEG) 1500, lithium sulfate, or magnesium sulfate were determined at (283.15, 298.15, and 313.15) K and of PEG 1500 + sodium sulfate were obtained at (278.15, 298.15, 305.65, and 313.15) K. The temperature effect on the position of the binodal curves was negligible, indicating a small enthalpic contribution to the phase separation process. The ability of the three salts to induce the formation of a biphasic system with PEG 1500 followed the order MgSO4 > Na2SO4 > Li2SO4.

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