Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Aqueous two-phase systems of polyoxyethylene lauryl ether and potassium gluconate/potassium oxalate/potassium citrate at different temperature-experimental results and modeling of (liquid + liquid) equilibrium data

Lu, Y.[Yang], Hao, T.[Tongfan], Zhou, Y.[Yan], Han, J.[Juan], Tan, Z.[Zhenjiang], Yan, Y.[Yongsheng]
J. Chem. Thermodyn. 2014, 71, 137-147
ABSTRACT
The binodal data for the systems containing the POELE10 and KC6H11O7/K2C2O4/K3C6H5O7 were determined at the T = (288.15, 298.15, 308.15) K. The three experiential equations were used to fit the binodal data and they achieved the satisfactory fitting effect. The effect of salt type on the phase-seperation ability of salt was studied. It was found that the phase-seperation ability of the salt with the higher valence anion is stronger than that with lower valence anion, namely, the order of the phase-seperation ability for the investigated salts is potassium citrate greater than potassium oxalate greater than potassium gluconate, which is also validated by the effective excluded volume (EEV). The (liquid + liquid) equilibrium data for the studied systems were determined and correlated by using the Pitzer Debye Huckel equation and Chen-NRTL model along with the Flory Huggins equation, and good agreement was obtained with using these thermodynamic models.
Compounds
# Formula Name
1 C32H66O11 decaethylene glycol monododecyl ether
2 C6H11KO7 potassium D-gluconate
3 C2K2O4 potassium oxalate
4 C6H5K3O7 potassium citrate
5 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
  • 5
  • 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
  • 97
  • POMD
  • 2
  • 5
  • 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 2 ; 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
  • Flame photometry
  • Flame photometry
  • Flame photometry
  • 16
  • POMD
  • 3
  • 5
  • 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
  • 95
  • POMD
  • 3
  • 5
  • 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 1
  • Liquid mixture 2
  • Liquid mixture 1
  • flame photometry
  • flame photometry
  • flame photometry
  • 16
  • POMD
  • 4
  • 5
  • 1
  • Mass fraction - 4 ; 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
  • 107
  • POMD
  • 4
  • 5
  • 1
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • flame photometry
  • flame photometry
  • flame photometry
  • 16