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Liquid-Liquid and Liquid-Liquid-Solid Equilibrium of the Poly(ethyleneglycol) Dimethyl Ether 2000 + Sodium Sulfate + Water System
Physical Chemistry Department, University of Tabriz.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Physical Chemistry Department, University of Tabriz.
2008 (English)In: Journal of Chemical and Engineering Data, ISSN 0021-9568, E-ISSN 1520-5134, Vol. 53, no 11, 2666-2670 p.Article in journal (Refereed) Published
Abstract [en]

The phase diagram for the poly(ethylene glycol) dimethyl ether (PEGDE) + Na2SO4 + H2O system at298.15 K using PEGDE with a molar mass of 2000 was determined. Compositions of the liquid-liquid and the liquid-liquid-solid equilibria were determined using calibration curves of refractive index of the solutions, and atomic absorption (AA) and X-ray diffraction analyses were made on the solids. The solid phase in equilibrium with the biphasic region was anhydrous Na2SO4. An empirical nonlinear three-parameter expression developed by Merchuk was used for reproducing the experimental binodal data at T ) (288.15,298.15, 308.15, and 318.15) K, and the fitting parameters were obtained for the corresponding temperatures.The effects of temperature on the binodal curve were also studied, and it was observed that the area of the biphasic region increased slightly with an increase in temperature. The experimental tie-line compositions at the aforementioned temperatures were fitted to both the Othmer-Tobias and Bancroft and Setschenowtypeequations. Correlation coefficients for all equations are reported.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2008. Vol. 53, no 11, 2666-2670 p.
National Category
Polymer Technologies Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-61916DOI: 10.1021/je8005858OAI: oai:DiVA.org:ltu-61916DiVA: diva2:1073210
Available from: 2017-02-09 Created: 2017-02-09 Last updated: 2017-11-24Bibliographically approved

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Nikjoo, Dariush

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