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

Thermodynamic Equilibrium of Aqueous Two-Phase Systems Composed of [C4mim]BF4 + MgCl2/Na2WO4 + H2O at Different Temperatures

Wang, T.[Tingting], Zhang, D.[Dan], Cai, Y.[Yunfeng], Han, J.[Juan], Liu, Q.[Qian], Wang, Y.[Yun]
J. Chem. Eng. Data 2016, 61, 5, 1821-1828
ABSTRACT
Binodal data for the 1-butyl-3-methylimidazolium tetrafluoroborate ([C4mim]BF4) + salt (MgCl2/Na2WO4) + H2O systems were experimentally determined at T = (288.15, 298.15, and 308.15) K, respectively. The binodal data were successfully correlated by an empirical equation with four parameters. The liquid liquid equilibrium data were given and satisfactorily correlated by the Othmer Tobias and Bancroft equations, as well as a two-parameter equation. Additionally, the Chen-NRTL model, the Pitzer-Debye Huckel equation, and the Flory Huggins equation were used to determine and correlate the liquid liquid equilibrium data for the studied systems, and good agreement was obtained with these thermodynamic models. The influences of the two salts and temperature on the phase equilibrium were investigated. The phase-separation ability of MgCl2 is stronger than that of Na2WO4. As the temperature of the systems decreases, the two-phase region shows an expansion trend.
Compounds
# Formula Name
1 C8H15BF4N2 1-butyl-3-methylimidazolium tetrafluoroborate
2 Cl2Mg magnesium chloride
3 Na2O4W sodium tungstate
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
  • 117
  • POMD
  • 4
  • 2
  • 1
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2 ; 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
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 12
  • 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
  • 116
  • POMD
  • 4
  • 3
  • 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 3; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 12