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

Liquid Liquid Equilibria of the Aqueous Two-Phase Systems Composed of the N-Ethylpyridinium Tetrafluoroborate Ionic Liquid and Ammonium Sulfate/Anhydrous Sodium Carbonate/Sodium Dihydrogen Phosphate and Water at 298.15 K

Li, Y.[Yuliang], Shu, X.[Xiao], Zhang, X.[Xuewen], Guan, W.[Weisheng]
J. Chem. Eng. Data 2014, 59, 2, 176-182
ABSTRACT
In this work, the phase diagrams and the liquid liquid equilibrium (LLE) data at 298.15 K of the aqueous [EPy]BF4 + ammonium sulfate + H2O, [EPy]BF4 + sodium dihydrogen phosphate + H2O, and [EPy]BF4 + sodium carbonate + H2O two-phase systems were experimentally determined. The Merchuk equation was used to correlate the binodal data of the investigated systems. The tie-line data were correlated according to the Othmer Tobias and Bancroft equations, the Setschenow equation, and a two-parameter equation. The results indicate that all of these equations can be successfully used to correlate the experimental data of the investigated systems at 298.15 K. Both the calculated effective excluded volume (EEV) and the binodal curves, which were plotted using the mass fractions, indicate the phase-separation abilities of the investigated salts, which follow the following order: Na2CO3 greater than (NH4)2SO4 greater than NaH2PO4.
Compounds
# Formula Name
1 C7H10BF4N 1-ethylpyridinium tetrafluoroborate
2 H2NaO4P sodium dihydrogen phosphate
3 H8N2O4S ammonium sulfate
4 H2O water
5 CNa2O3 sodium carbonate
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
  • 1
  • 4
  • 3
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 3; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 55
  • POMD
  • 1
  • 4
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 1; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • OTHER
  • OTHER
  • OTHER
  • 3
  • POMD
  • 1
  • 5
  • 4
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 59
  • POMD
  • 1
  • 5
  • 4
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 3
  • POMD
  • 1
  • 2
  • 4
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 22
  • POMD
  • 1
  • 2
  • 4
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 3