Salt Effects on Vapor Liquid Equilibrium of Acetic Acid-Water System

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  • TAKAKURA Kouich
    Densyo Engineering Co. Ltd.
  • SUMOGE Iwao
    Densyo Engineering Co. Ltd.
  • ARAKI Sadao
    Department of Chemical Engineering and Environmental Engineering, Faculty of Environmental and Urban Engineering, Kansai University
  • YAMAMOTO Hideki
    Department of Chemical Engineering and Environmental Engineering, Faculty of Environmental and Urban Engineering, Kansai University

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  • 酢酸－水系の気液平衡に及ぼす塩効果

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Abstract

The vapor-liquid equilibrium of several acetic acid-water-salt systems under atmospheric pressure was determined by employing lithium nitrate, magnesium nitrate, potassium nitrate, and potassium acetate as salts. In the vapor-liquid equilibrium of an acetic acid-water-salt system, lithium nitrate, magnesium nitrate, and potassium nitrate showed a salting-out effect, while potassium acetate showed a salting-in effect. The vapor-liquid equilibria with the nitrate, chloride, bromide, and acetate salts at a salt concentration of 1.0 mol/kg were also determined, and it was shown that by keeping the anion the same and changing the cations of salts with those having a smaller hydration enthalpy showed an increased salting-out effect. Alternatively, when the cation was kept the same, the salts showed the salting-out effect in the following order: chloride > bromide > nitrate > acetate salts; the acetate salt showed a salting-in effect.

Journal

  • Netsu Bussei

    Netsu Bussei 28 (4), 166-172, 2015

    JAPAN SOCIETY OF THERMOPHYSICAL PROPERTIES

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