Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

Liquid Liquid Equilibrium Data for {Heptane + Aromatic + 1-(2-Hydroxyethyl)-3-methylimidazolium Bis(trifluoromethylsulfonyl)imide ([hemim][NTf2])} Ternary Systems

Ebrahimi, M., Ahmadi, A. N., Safekordi, A. A., Fateminasab, F., Mehdizadeh, A.
J. Chem. Eng. Data 2014, 59, 2, 197-204
ABSTRACT
1-(2-Hydroxyethyl)-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquid ([hemim][NTf2]) was synthesized as a new functionalized ionic liquid to study the effect of addition of the hydroxyl group to the imidazolium cation on aliphatic/aromatic separations. For this purpose, liquid liquid equilibrium (LLE) data for {heptane + toluene or benzene + 1-(2-hydroxyethyl)-3-methylimidazolium bis (trifluoromethylsulfonyl)imide ([hemim][NTf2])} systems were measured at 313.2 K and atmospheric pressure. The measured LLE data were correlated using three basically distinct thermodynamic models; that is, nonrandom two-liquid (NRTL), Othmer Tobias, and Hand correlations. Results show that there is good agreement between correlated and experimental data. Our experimental results indicate that the addition of the hydroxyl group to imidazolium cation significantly enhances the performance of the ionic liquid in terms of selectivity.
Compounds
# Formula Name
1 C8H11F6N3O5S2 1-(2-hydroxyethyl)-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide
2 C7H8 toluene
3 C6H6 benzene
4 C7H16 heptane
Datasets
The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type Compound-# Property Variable Constraint Phase Method #Points
  • POMD
  • 2
  • 4
  • 1
  • Mole fraction - 4 ; Liquid mixture 2
  • Mole fraction - 4 ; Liquid mixture 1
  • Mole fraction - 2 ; Liquid mixture 1
  • Mole fraction - 2; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 9
  • POMD
  • 3
  • 4
  • 1
  • Mole fraction - 4 ; Liquid mixture 2
  • Mole fraction - 4 ; Liquid mixture 1
  • Mole fraction - 3 ; Liquid mixture 1
  • Mole fraction - 3; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 9