Liquid-liquid equilibrium of substituted perfluoro-n-octane + n-octane systems

Fatima R. Varanda, Lourdes F. Vega, Joào A.P. Coutinho, Isabel M. Marrucho

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6 Scopus citations


The liquid-liquid phase equilibria of substituted perfluoro-n-octane (1Br-perfluoro-n-octane, 1H-perfluoro-n-octane, 1H,8H-perfluoro-n-octane) + n-octane were experimentally determined by turbidimetry in the temperature range between 270 K and 330 K and at the vapor pressure of the mixture. The measured equilibrium data were correlated with an equation derived from renormalization group (RG) theory and with soft-SAFT Equation of State. The LLE data of the binary mixtures of n-octane + substituted perfluoro-n-octane were compared with n-octane + perfluoro-n-octane data. The results indicate an increasing solubility with 1Br-perfluoro-n-octane and show that the introduction of second hydrogen atom has almost no effect on phase equilibrium.

Original languageBritish English
Pages (from-to)85-89
Number of pages5
JournalFluid Phase Equilibria
Issue number1-2
StatePublished - 25 Jun 2008


  • Fluorocarbons
  • Liquid-liquid equilibrium
  • PFC
  • Renormalization group theory
  • Soft-SAFT EoS


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