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

Influence of the Salting-Out Ability and Temperature on the Liquid Liquid Equilibria of Aqueous Two-Phase Systems Based on Ionic Liquid Organic Salts Water

Li, Y.[Yuliang], Lu, X.[Xiaojia], He, W.[Wenting], Huang, R.[Rong], Zhao, Y.[Yingjie], Wang, Z.[Zhiqiang]
J. Chem. Eng. Data 2016, 61, 1, 475-486
ABSTRACT
In the present work, (liquid + liquid) equilibrium (LLE) data have been determined experimentally for aqueous two-phase systems formed by the ionic liquids n-butylpyridinium trifluoromethanesulfonate [Bpy]OTF and the organic salts of ammonium citrate ((NH4)3C6H5O7) and sodium succinate (Na2C4H4O4) at T = (298.15, 318.15, and 328.15) K. Binodal curves were fitted to two empirical equations with different parameters. The quality of the experimental LLE data was established by applying the Othmer Tobias and Bancroft correlations. The tie-line data of the systems at three different temperatures has also been described by the Setschenow-type equation. The phase diagrams for the two-phase systems show good agreement with the experimental data. Furthermore, the temperature dependence of the binodal curves has also been discussed. The results show the salting-out ability of Na2C4H4O4 exceed (NH4)3C6H5O7, which can be related to the Gibbs energy.
Compounds
# Formula Name
1 C10H14F3NO3S 1-butylpyridinium trifluoromethanesulfonate
2 C6H17N3O7 ammonium 2-hydroxypropane-1,2,3-tricarboxylate
3 C4H4Na2O4 disodium succinate
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 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
  • 374
  • POMD
  • 2
  • 4
  • 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 1 ; 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
  • UV spectrometer
  • UV spectrometer
  • UV spectrometer
  • 15
  • 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
  • 336
  • POMD
  • 3
  • 4
  • 1
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • UV spectrometer
  • UV spectrometer
  • UV spectrometer
  • 15