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

Measurement and Correlation of Phase Diagram Data for Several Hydrophilic Alcohol + Citrate Aqueous Two-Phase Systems at 298.15 K

Wang, Y.[Yun], Hu, S.[Shiping], Han, J.[Juan], Yan, Y.[Yongsheng]
J. Chem. Eng. Data 2010, 55, 11, 4574-4579
ABSTRACT
Binodal data for the ethanol + (NH4)3C6H5O7 + water system and the 2-propanol + (NH4)3C6H5O7/Na3C6H5O7/K3C6H5O7 + water systems were experimentally determined at 298.15 K. Three empirical equations were used to correlate binodal data. On the basis of the equation with the highest accuracy and lever rule, the liquid-liquid equilibrium data were calculated by MATLAB. The reliability of the calculation method and the corresponding tie-line data was proved by the Othmer-Tobias equation and Bancroft equation. The determined binodal data were also correlated by two theoretical equations on the basis of excluded volume theory. The calculated effective excluded volume (EEV) of salt and the binodal curves plotted in molality both indicate that the salting-out abilities of the investigated salts are in the order Na3C6H5O7 K3C6H5O7 greater than (NH4)3C6H5O7, and the phase-separation abilities of the investigated alcohols are in the order 2-propanol greater than ethanol.
Compounds
# Formula Name
1 C2H6O ethanol
2 C3H8O propan-2-ol
3 C6H5Na3O7 trisodium citrate
4 C6H5K3O7 potassium citrate
5 C6H17N3O7 ammonium 2-hydroxypropane-1,2,3-tricarboxylate
6 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
  • 1
  • 5
  • 6
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 23
  • POMD
  • 1
  • 5
  • 6
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 1 ; 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
  • 4
  • POMD
  • 2
  • 5
  • 6
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 30
  • POMD
  • 2
  • 5
  • 6
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 4
  • POMD
  • 2
  • 3
  • 6
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 30
  • POMD
  • 2
  • 3
  • 6
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 5
  • POMD
  • 2
  • 4
  • 6
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 26
  • POMD
  • 2
  • 4
  • 6
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 4