Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Liquid-liquid equilibria of aqueous systems containing alcohol and ammonium sulfate

Feng, Z.[Ziyan], Li, J. Q.[Joshua Qingsong], Sun, X.[Xiaotong], Sun, L.[Lanyi], Chen, J.[Jinqing]
Fluid Phase Equilib. 2012, 317, 1-8
ABSTRACT
Binodal data and liquid-liquid equilibrium (LLE) data for alcohol + ammonium sulfate + water systems were measured using the cloud-point method and saturation density method at different temperatures. The effect of temperature on the phase-forming ability of isopropanol and n-butanol was also discussed, based on the phase diagrams. Furthermore, an empirical nonlinear expression was used to reproduce the experimental binodal data. The liquid-liquid equilibrium compositions of the aqueous systems were correlated and predicted using Othmer-Tobias and Bancroft equations at different temperatures. The results obtained from the correlation were consistent with root mean square deviations that were always below 1.7% as mass fractions between the experimental and calculated compositions of both equilibrium phases.
Compounds
# Formula Name
1 C3H8O propan-2-ol
2 C4H10O butan-1-ol
3 H8N2O4S ammonium 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
  • 1
  • 4
  • 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
  • 81
  • POMD
  • 1
  • 4
  • 3
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 3; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • Titration method
  • Titration method
  • Titration method
  • Titration method
  • Titration method
  • 13
  • POMD
  • 2
  • 4
  • 3
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Density calibration data
  • 45
  • POMD
  • 2
  • 4
  • 3
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 3 ; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Mass fraction - 4; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Density calibration data
  • Density calibration data
  • Density calibration data
  • Density calibration data
  • Density calibration data
  • 18