Phenomenological interpretation of the systems exhibiting a closed-loop liquid-liquid phase diagram by using a simple g e-model

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Abstract

A simple phenomenological gE-model based on the Flory-Huggins lattice theory was used to interpret critical behavior, excess properties and liquid-liquid equilibria of three aqueous systems that exhibit a closed-loop phase diagram: (2-butoxyethanol + water), (2,6-dimethylpyridine + water) and (tetrahydrofuran (THF) + water). The model showed flexibility in application and good performance in all the aforementioned properties. Since it describes with a very good accuracy both binodal (coexistence) curves and excess enthalpies, it was used to calculate the molar excess enthalpies of the phases in equilibrium which may be a useful task in practice.

Original languageEnglish
Pages (from-to)261-283
Number of pages23
JournalJournal of Solution Chemistry
Volume40
Issue number2
DOIs
Publication statusPublished - 1 Feb 2011

Keywords

  • Binodal curve
  • Closed-loop phase diagram
  • Excess properties
  • Florry-Huggins lattice theory
  • Phenomenological g-model

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