Thermodynamics Research Center / ThermoML | Thermochimica Acta

Liquid-Liquid Equilibrium of Aqueous Two-Phase Systems Composed of Hydrophilic Alcohols (Ethanol/2-Propanol/1-Propanol) and MgSO4 /ZnSO4 at (303.15 and 313.15) K and Correlation

Guo, W.[Wenlu], Ma, J.[Jingjing], Wang, Y.[Yun], Han, J.[Juan], Li, Y.[Yanfang], Song, S.[Shan]
Thermochim. Acta 2012, 546, 8-15
ABSTRACT
Binodal data for ethanol, 2-propanol and 1-propanol + magnesium sulfate/zinc sulfate + water systems were experimentally determined at (303.15 and 313.15) K, respectively. An empirical equation was used to correlate binodal data. The liquid-liquid equilibrium data for part of the investigated systems were obtained via the MATLAB. In order to evaluate the dependability of the calculation method and the tie-line data, the liquid-liquid equilibrium data were correlated by the Othmer-Tobias and Bancroft equations. The salting-out abilities of the investigated salts and the phaseforming abilities of the investigated hydrophilic alcohols were discussed by the effective excluded volume (EEV) of salt. The salting-out abilities of the investigated salts follow the order ZnSO4 greater than MgSO4, which can be indicated by the location of the binodal curves plotted in molality and the salting-out coefficient. In addition, the phase-forming abilities of the investigated hydrophilic alcohols follow the order: 1-propanol greater than2-propanol greater than ethanol.
Compounds
# Formula Name
1 C2H6O ethanol
2 H2O water
3 O4SZn zinc sulfate
4 C3H8O propan-2-ol
5 C3H8O propan-1-ol
6 MgO4S magnesium sulfate
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
  • 2
  • 3
  • 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
  • 1
  • 2
  • 3
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 4
  • 2
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 103
  • POMD
  • 4
  • 2
  • 3
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 5
  • 2
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 92
  • POMD
  • 5
  • 2
  • 3
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 1
  • 6
  • 2
  • Mass fraction - 6 ; Liquid
  • Temperature, K; Liquid
  • Mass fraction - 1; Liquid
  • Pressure, kPa; Liquid
  • Liquid
  • Crystal - 6
  • Titration method
  • 81
  • POMD
  • 4
  • 6
  • 2
  • Mass fraction - 6 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 84
  • POMD
  • 4
  • 6
  • 2
  • Mass fraction - 6 ; Liquid mixture 2
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 2
  • Liquid mixture 1
  • Phase equilibration
  • Phase equilibration
  • Phase equilibration
  • 3
  • POMD
  • 5
  • 6
  • 2
  • Mass fraction - 6 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 94