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Vapor−Liquid Equilibria for the Ternary System Ethanol + Water + 1-Butyl-3-methylimidazolium Methylsulfate and the Corresponding Binary Systems at 101.3 kPa

Noelia Calvar, Begoña González, Elena Gómez, Ángeles Domínguez

Abstract

In this work, isobaric ternary vapor−liquid equilibria for the ionic liquid 1-butyl-3-methylimidazolium methylsulfate (BMimMSO 4 ) + ethanol + water and for the corresponding binary systems containing the ionic liquid were carried out at 101.3 kPa. Vapor−liquid equilibria data of binary systems were correlated using the e-NRTL and NRTL equations. The ternary system was correlated using the NRTL equation. A study of the evolution of the ethanol + water azeotrope composition with different amounts of ionic liquid was made.

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Key concepts: Non-random two-liquid model, Azeotrope, Ionic liquid, Ternary operation, Chemistry, Ternary numeral system, Isobaric process, Thermodynamics