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

Phase Diagram Data for Ethanol/Propan-1-ol/Propan-2-ol-2,3-Dihydroxybutanedioate Aqueous Two-Phase Systems at 298.15 K and Data Correlation

Wang, Y.[Yun], Mao, Y.[Yanli], Han, J.[Juan], Liu, Y.[Yan]
J. Chem. Eng. Data 2011, 56, 3, 622-626
ABSTRACT
Binodal data for the ethanol/propan-1-ol/propan-2-ol-dipotassium 2,3-dihydroxybutanedioate aqueous two-phase system (ATPS), the propan-2-ol-disodium 2,3-dihydroxybutanedioate/diammonium 2,3-dihydroxybutanedioate ATPS, and the ethanol-potassium sodium 2,3-dihydroxybutanedioate ATPS were determined at 298.15 K. An empirical equation was used to correlate binodal data, and it showed satisfactory accuracy in binodal data fitting for all of the determined systems. The phase-separation abilities of the investigated salts and the water-miscible alcohols were compared by the plotting of binodal curves in mass fraction. The phase-separation abilities of the investigated alcohols are in the order propan-1-ol greater than propan-2-ol greater than ethanol, and those of salts are in the order disodium 2,3-dihydroxybutanedioate greater than potassium sodium 2,3-dihydroxybutanedioate greater than dipotassium 2,3-dihydroxybutanedioate greater than diammonium 2,3-dihydroxybutanedioate. However, the two-phase area of the investigated alcohol-dipotassium 2,3-dihydroxybutanedioate ATPS is higher than that of the alcohol-disodium 2,3-dihydroxybutanedioate/potassium sodium 2,3-dihydroxybutanedioate/diammonium 2,3-dihydroxybutanedioate ATPS. The salting-out abilities of the common cations (K+, Na+, and NH4+) were discussed by comparing their effective excluded volume (EEV) in the propan-2-ol-water component solvent and the binodal curves plotted in molality. They are in the order Na+ K+ greater than NH4+.
Compounds
# Formula Name
1 C4H4K2O6 dipotassium L-tartrate
2 C4H4Na2O6 disodium L-tartrate
3 C4H12N2O6 ammonium (2R,3R)-2,3-dihydroxysuccinate
4 C4H4KNaO6 potassium sodium (2R,3R)-2,3-dihydroxybutanedioate (1:1:1)
5 C2H6O ethanol
6 C3H8O propan-1-ol
7 C3H8O propan-2-ol
8 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
  • 5
  • 1
  • 8
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 31
  • POMD
  • 6
  • 1
  • 8
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 6; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 30
  • POMD
  • 7
  • 1
  • 8
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 31
  • POMD
  • 7
  • 3
  • 8
  • Mass fraction - 3 ; Liquid mixture 1
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 31
  • POMD
  • 5
  • 4
  • 8
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 5; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 15
  • POMD
  • 7
  • 2
  • 8
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 7; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 28