Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Measurement and correlation of aqueous biphasic systems composed of alcohol (1-propanol/ 2-propanol/tert-butanol) + (NH4)2SO4 + H2O at 298 K and a textile dye partition.

Sanglard, Matheus Gomes, Farias, Fabiane Oliveira, Sosa, Filipe Hobi Bordon, Santos, Tamisa P. M. dos, Igarashi-Mafra, Luciana, Mafra, Marcos R.
Fluid Phase Equilib. 2018, 466, 7-13
ABSTRACT
Aqueous biphasic systems (ABS) are a promising method for separation and purification of several biomolecules. The use of organic compounds as phase former in ABS have been studied with the main finality to obtain systems with lower viscosity compared to conventional systems (composed of a polymer and a salt or two different salts). In this work, the effect of three different alcohols (1-propanol, 2-propanol, and tert-butanol) in ABS composed of alcohol + ammonium sulfate + water was evaluated. The phases diagrams were obtained, and the alcohol nature presented direct influence at the biphasic region. The experimental data were also correlated using an NRTL and UNIQUAC model, and the NRTL model presented a low mean deviation (RMSD less than 0.33 %). The partition of a textile dye, Remazol Brilliant Blue R, was evaluated and presented partition coefficients (K) higher than 26.4 and extraction efficiency up to 97.2 %, indicating a potential application of these systems.
Compounds
# Formula Name
1 H8N2O4S ammonium sulfate
2 C3H8O propan-1-ol
3 C3H8O propan-2-ol
4 C4H10O 2-methylpropan-2-ol
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
  • 1
  • 2
  • 5
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 88
  • POMD
  • 1
  • 2
  • 5
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 2 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 2; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Gravimetric
  • Gravimetric
  • Gravimetric
  • 6
  • POMD
  • 1
  • 3
  • 5
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 37
  • POMD
  • 1
  • 3
  • 5
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 3 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 3; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Gravimetric
  • Gravimetric
  • Gravimetric
  • 6
  • POMD
  • 1
  • 4
  • 5
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 78
  • POMD
  • 1
  • 4
  • 5
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 4; Liquid mixture 1
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Gravimetric
  • Gravimetric
  • Gravimetric
  • 6