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

Liquid Extraction of Toluene from Heptane, Octane, or Nonane Using Mixed Ionic Solvents of 1-Ethyl-3-methylimidazolium Methylsulfate and 1-Hexyl-3-methylimidazolium Hexafluorophosphate

Alkhaldi, Khaled H. A. E., Al-Jimaz, Adel S., AlTuwaim, Mohammad S.
J. Chem. Eng. Data 2019, 64, 1, 169-175
ABSTRACT
Liquid-liquid extractions of toluene from paraffin compounds, using binary ionic solvent mixtures of 1-hexyl-3-methylimidazolium hexafluorophosphate [hmim][PF6] and 1-ethyl3-methylimidazolium methylsulfate [emim][CH3SO4], have been examined at 313.15 K and an atmospheric pressure of 101.3 kPa. Based on the experimental liquid-liquid equilibrium data for the pseudoternary systems consisting of heptane, octane or nonane + toluene + [hmim][PF6] + [emim][CH3SO4], the distribution ratios and selectivity values were calculated and compared to systems using pure ionic liquids or sulfolane. The results showed that the use of a binary mixture of [hmim][PF6] + [emim][CH3SO4] at a solvent mole fraction of 0.9 for [hmim][PF6] improves both the toluene distribution ratio and the selectivity, with respect to those of sulfolane and other pure ionic solvents. Consequently, these mixed ionic liquids could be considered an environmentally benign alternative solvent for the aromatic extraction process. The experimental data were correlated by the nonrandom two-liquid (NRTL) model.
Compounds
# Formula Name
1 C10H19F6N2P 1-hexyl-3-methylimidazolium hexafluorophosphate
2 C7H14N2O4S 1-ethyl-3-methylimidazolium methylsulfate
3 C7H16 heptane
4 C8H18 octane
5 C9H20 nonane
6 C7H8 toluene
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
  • 3
  • 6
  • 2
  • Mole fraction - 6 ; Liquid mixture 1
  • Mole fraction - 6 ; Liquid mixture 2
  • Mole fraction - 3 ; Liquid mixture 2
  • Mole fraction - 3; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Chromatography
  • Chromatography
  • Chromatography
  • 1
  • POMD
  • 3
  • 6
  • 1
  • Mole fraction - 6 ; Liquid mixture 2
  • Mole fraction - 6 ; Liquid mixture 1
  • Mole fraction - 3 ; Liquid mixture 1
  • Mole fraction - 3; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Chromatography
  • Chromatography
  • Chromatography
  • 1
  • POMD
  • 3
  • 1
  • 2
  • Mole fraction - 1 ; Liquid mixture 2
  • Mole fraction - 1 ; Liquid mixture 1
  • Mole fraction - 3 ; Liquid mixture 1
  • Mole fraction - 3; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Chromatography
  • Chromatography
  • Chromatography
  • 1
  • POMD
  • 4
  • 1
  • 2
  • Mole fraction - 1 ; Liquid mixture 2
  • Mole fraction - 1 ; Liquid mixture 1
  • Mole fraction - 4 ; Liquid mixture 1
  • Mole fraction - 4; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Chromatography
  • Chromatography
  • Chromatography
  • 1
  • POMD
  • 5
  • 1
  • 2
  • Mole fraction - 1 ; Liquid mixture 2
  • Mole fraction - 1 ; Liquid mixture 1
  • Mole fraction - 5 ; Liquid mixture 1
  • Mole fraction - 5; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Chromatography
  • Chromatography
  • Chromatography
  • 1