Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Alkylsulfate-based ionic liquids in the liquid-liquid extraction of aromatic hydrocarbons

Garcia, S.[Silvia], Larriba, M.[Marcos], Garcia, J.[Julian], Torrecilla, J. S.[Jose S.], Rodriguez, F.[Francisco]
J. Chem. Thermodyn. 2012, 45, 1, 68-74
ABSTRACT
The (liquid + liquid) equilibrium data (LLE) for the extraction of toluene from heptane with different ionic liquids (ILs) based on the alkylsulfate anion (R-SO4) was determined at T = 313.2 K and atmospheric pressure. The effect of more complex R-SO4 anions on capacity of extraction and selectivity in the liquid liquid extraction of toluene from heptane was studied. The ternary systems were formed by {heptane + toluene + 1,3-dimethylimidazolium methylsulfate ([mmim][CH3SO4]), 1-ethyl-3-methylimidazolium hydrogensulfate ([emim][HSO4]), 1-ethyl-3-methylimidazolium methylsulfate ([emim][CH3SO4]), or 1-ethyl-3-methylimidazolium ethylsulfate ([emim][C2H5SO4])}. The degree of quality of the experimental LLE data was ascertained by applying the Othmer-Tobias correlation. The phase diagrams for the ternary systems were plotted, and the tie lines correlated with the NRTL model compare satisfactorily with the experimental data.
Compounds
# Formula Name
1 C7H16 heptane
2 C7H8 toluene
3 C6H12N2O4S 1,3-dimethylimidazolium methylsulfate
4 C6H12N2O4S 1-ethyl-3-methylimidazolium hydrogen sulfate
5 C7H14N2O4S 1-ethyl-3-methylimidazolium methylsulfate
6 C8H16N2O4S 1-ethyl-3-methylimidazolium ethyl sulfate
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
  • 1
  • 3
  • Mole fraction - 1 ; Liquid mixture 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Mole fraction - 2 ; Liquid mixture 2
  • Mole fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Proton NMR spectroscopy
  • Proton NMR spectroscopy
  • Proton NMR spectroscopy
  • 12
  • POMD
  • 2
  • 1
  • 4
  • Mole fraction - 2 ; Liquid mixture 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Mole fraction - 2 ; Liquid mixture 2
  • Mole fraction - 1; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • OTHER
  • OTHER
  • 11
  • POMD
  • 2
  • 1
  • 5
  • Mole fraction - 2 ; Liquid mixture 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Mole fraction - 2 ; Liquid mixture 2
  • Mole fraction - 1; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • OTHER
  • OTHER
  • 12
  • POMD
  • 2
  • 1
  • 6
  • Mole fraction - 2 ; Liquid mixture 1
  • Mole fraction - 1 ; Liquid mixture 2
  • Mole fraction - 2 ; Liquid mixture 2
  • Mole fraction - 1; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • OTHER
  • OTHER
  • 12