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Vapor−Liquid Equilibria and Interfacial Tensions of the System Ethanol + 2-Methoxy-2-methylpropane

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Departamento de Ingeniería Química, Universidad de Concepción, P.O. Box 160C, Correo 3, Concepción 4089100, Chile
* To whom correspondence should be addressed. E-mail: [email protected] (A.M.) and [email protected] (H.S.).
Cite this: J. Chem. Eng. Data 2010, 55, 1, 428–434
Publication Date (Web):August 11, 2009
https://doi.org/10.1021/je9004068
Copyright © 2009 American Chemical Society

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    Abstract

    Isobaric vapor−liquid equilibrium data have been measured for the binary system ethanol + 2-methoxy-2-methylpropane at (50, 75, and 94) kPa and over the temperature range (308 to 345) K. Equilibrium determinations were performed in a vapor−liquid equilibrium still with circulation of both phases. The dependence of interfacial tensions of this mixture on concentration was also determined at atmospheric pressure and 303.15 K, using the maximum bubble pressure technique. According to experimental results, the mixture exhibits positive deviation from ideal behavior, and azeotropic behavior was observed at (75 and 94) kPa. In addition, the determined interfacial tensions exhibit negative deviation from the linear behavior, and aneotropy is present. The vapor−liquid equilibrium data of the binary mixture satisfy the Fredenlund’s consistency test and were well-correlated by the nonrandom two-liquid, Wilson, and UNIQUAC equations for all of the measured isobars. Interfacial tensions, in turn, were satisfactorily correlated using the Redlich−Kister equation.

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