Journal of Solution Chemistry

, Volume 36, Issue 5, pp 583–594 | Cite as

Liquid–Liquid Equilibria of Oxygenate Fuel Additives with Water: Two Quaternary Aqueous Systems of Diisopropyl Ether + 2,2,4-Trimethylpentane with Methyl tert-Butyl Ether or Toluene

  • Yao Chen
  • Shengli Zhang
Original Paper


Experimental tie-line data for two quaternary systems, water + diisopropyl ether + 2,2,4-trimethylpentane + methyl tert-butyl ether or toluene, were investigated at 298.15 K and atmospheric pressure. The experimental liquid–liquid equilibrium data were correlated using a modified UNIQUAC activity coefficient model with ternary and quaternary parameters, in addition to the binary ones. The calculated results were further compared with those obtained with an extended UNIQUAC model from Nagata [Fluid Phase Equilib. 54, 191–206 (1990)].


Ternary and quaternary liquid–liquid equilibria Oxygenate fuel additive Modified extended UNIQUAC models 


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© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of ChemistryJinan UniversityGuangzhouPeople’s Republic of China

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