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

Phase behavior at Different Temperatures of an Aqueous Two-Phase Ionic Liquid Containing ([BPy] NO3 + Ammonium Sulfate and Sodium Sulfate + Water)

Li, Y.[Yuliang], Huang, R.[Rong], Zhu, Q.[Qi], Yu, Y.[Yonghong], Hu, J.[Jing]
J. Chem. Eng. Data 2017, 62, 2, 796-803
ABSTRACT
Phase diagrams of aqueous two-phase systems composed of N-butylpyridinium nitrate + salt (ammonium sulfate and sodium sulfate) + water determined at (298.15, 308.15, 318.15 and 328.15) K. The binodal curves were associated with the Merchuk expression and another two empirical expressions. The influences of temperature and the type of cations were also studied, which demonstrated that lower temperature led to the expansion of the two-phase region, whereas the salting-out abilities of Na2SO4 exceeded that of (NH4)2SO4, which was proven by the Gibbs free energy of hydration of the ions.
Compounds
# Formula Name
1 C9H14N2O3 1-butylpyridinium nitrate
2 H8N2O4S ammonium sulfate
3 Na2O4S sodium sulfate
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
  • 4
  • 2
  • 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
  • 282
  • POMD
  • 4
  • 3
  • 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
  • 335