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

Liquid-Liquid Equilibria of Ionic Liquid 1-Butyl-3-Methylimidazolium Tetrafluoroborate + Sodium and Ammonium Citrate Aqueous Two-Phase Systems at (298.15, 308.15, and 323.15) K

Han, J.[Juan], Pan, R.[Ru], Xie, X.[Xueqiao], Wang, Y.[Yun], Yan, Y.[Yongsheng], Yin, G.[Guowu], Guan, W.[Weixing]
J. Chem. Eng. Data 2010, 55, 9, 3749-3754
ABSTRACT
Binodal curves of the aqueous 1-butyl-3-methylimidazolium tetrafluoroborate ([Bmim]BF4) + sodium citrate (Na3C6H5O7) and [Bmim]BF4 + ammonium tartrate ((NH4)3C6H5O7) systems have been determined experimentally at T = (298.15, 308.15, and 323.15) K. The Merchuk equation was used to correlate the binodal data. The effective excluded volume (EEV) values obtained from the binodal model for these two systems were determined. The binodal curves and EEV both indicate that the salting-out abilities of the two salts follow the order: Na3C6H5O7 greater than (NH4)3C6H5O7. It was demonstrated that the two-phase area was expanded with a decrease in temperature, while the slope of the tie lines slightly decreases with an increase in temperature. The liquid-liquid equilibrium (LLE) data were obtained by density determination and binodal curves correlation of these systems. The Othmer-Tobias and Bancroft and two-parameter equations were used for the correlation of the tie-line data. Good agreement was obtained with the experimental tie-line data with both models.
Compounds
# Formula Name
1 C8H15BF4N2 1-butyl-3-methylimidazolium tetrafluoroborate
2 C6H5Na3O7 trisodium citrate
3 C6H17N3O7 ammonium 2-hydroxypropane-1,2,3-tricarboxylate
4 H2O water
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
  • Mass density, kg/m3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Vibrating tube method
  • 24
  • POMD
  • 2
  • 4
  • 1
  • Mass density, kg/m3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Vibrating tube method
  • 21
  • POMD
  • 2
  • 4
  • 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 74
  • POMD
  • 2
  • 4
  • 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • Titration method
  • Titration method
  • 12
  • POMD
  • 3
  • 4
  • 1
  • Mass density, kg/m3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 3; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Vibrating tube method
  • 20
  • POMD
  • 3
  • 4
  • 1
  • Mass density, kg/m3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 3; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Vibrating tube method
  • 20
  • POMD
  • 3
  • 4
  • 1
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 72
  • POMD
  • 3
  • 4
  • 1
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • Titration method
  • Titration method
  • 12