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Vapor–Liquid Equilibria for (n-Hexane, n-Octane, Cyclohexane, or 2,3-Dimethylpentane) + Toluene + {[4empy][Tf2N] (0.3) + [emim][DCA] (0.7)} Mixed Ionic Liquids
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    Vapor–Liquid Equilibria for (n-Hexane, n-Octane, Cyclohexane, or 2,3-Dimethylpentane) + Toluene + {[4empy][Tf2N] (0.3) + [emim][DCA] (0.7)} Mixed Ionic Liquids
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    Department of Chemical Engineering, Complutense University of Madrid, E−28040 Madrid, Spain
    *E-mail: [email protected]. Tel.: +34 91 394 51 19. Fax: +34 91 394 42 43.
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    Journal of Chemical & Engineering Data

    Cite this: J. Chem. Eng. Data 2016, 61, 7, 2440–2449
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    https://doi.org/10.1021/acs.jced.6b00116
    Published June 17, 2016
    Copyright © 2016 American Chemical Society

    Abstract

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    Recently, the study about the use of ionic liquids (ILs) in the aromatic extraction is focused in the selective separation of the hydrocarbons and the solvent in order to propose a whole alternative process involving ILs. As a consequence, the vapor–liquid equilibria (VLE) for the hydrocarbons + ILs systems are required. In this work the VLE for several alkane + toluene systems in the presence of the 1-ethyl-4-methylpyridinium bis(trifluoromethylsulfonyl)imide ([4empy][Tf2N]) (0.3) + 1-ethyl-3-methylimidazolium dicyanamide ([emim][DCA]) (0.7) binary IL mixture were determined. In addition to extend the experimental VLE information, this work is aimed at the alkane structure evaluation: linear alkanes (n-hexane and n-octane), cyclic alkanes (cyclohexane), and branched-chain alkanes (2,3-dimethylpentane) have been used. All systems have been studied at 323.2, 343.2, and 363.2 K over the whole range of composition within the miscibility region. The NRTL thermodynamic model was used to adjust the VLE for all systems. The high values of alkane/toluene relative volatilities found suggest the alkane selective separation from the reference aromatic hydrocarbon, toluene.

    Copyright © 2016 American Chemical Society

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acs.jced.6b00116.

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    Journal of Chemical & Engineering Data

    Cite this: J. Chem. Eng. Data 2016, 61, 7, 2440–2449
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.jced.6b00116
    Published June 17, 2016
    Copyright © 2016 American Chemical Society

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