Liquid-liquid equilibria of a hydrofluoroether + water + ethanol system

Joel A. Luckman, Daniel C. Conrad, Barbara L. Knutson

Research output: Contribution to journalArticlepeer-review


The ability to manipulate the liquid-liquid equilibria (LLE) of a commercially available hydrofluoroether (HFE-7100®, an approximately equimolar mixture of the isomers methoxy-nonafluoroisobutane and methoxy-nonafluorobutane) + water with the addition of ethanol, which is mutually miscible with both solvents, was examined. LLE data were determined at 298, 308 and 323K for the system of HFE-7100®+water+ethanol. The UNIQUAC and NRTL excess Gibbs energy models were able to adequately represent the type I phase behavior observed over this temperature range. The goodness of the fit of each model was compared for temperature-dependent and temperature-independent binary interaction parameters.

Original languageEnglish
Pages (from-to)97-106
Number of pages10
JournalFluid Phase Equilibria
Issue number1
StatePublished - Aug 30 2002


  • Data
  • Fluorinated solvents
  • Liquid-liquid equilibria
  • NRTL

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Physics and Astronomy (all)
  • Physical and Theoretical Chemistry


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