Thermodynamics Research Center / ThermoML | Thermochimica Acta

Liquid liquid equilibria of hydrophilic alcohol + sodiumhydroxide + water systems: Experimental and correlation

Han, J.[Juan], Wu, Y.[Yingchun], Xiang, Y.[Yangyang], Wang, Y.[Yun], Ma, J.[Jingjing], Hu, Y.[Yutao]
Thermochim. Acta 2013, 566, 261-7
ABSTRACT
Binodal data for ethanol, 2-propanol and 1-propanol + sodium hydroxide (NaOH) + water systems wereexperimentally determined at 283.15, 298.15 and 313.15 K, respectively. An empirical equation was usedto correlate the binodal data. On the basis of the empirical equation with binodal data and the leverrule, the tie-lines data for the investigated systems at 298.15 K were obtained via the MATLAB and thencorrelated by Othmer-Tobias and Bancroft equations. Temperature and salting-out effects on this typeof ATPS were investigated. It was found that an increase in temperature leads to an expansion of thetwo-phase area. The salting-out ability of NaF is stronger than that of NaOH. Additionally, the phase-forming abilities of the investigated hydrophilic alcohols were discussed by both the effective excludedvolume (EEV) of the investigated salt and the location of the binodal curves of the investigated systems.The phase-forming abilities of the investigated hydrophilic alcohols follow the order: 1-propanol greater than 2-propanol greater than ethanol.
Compounds
# Formula Name
1 C2H6O ethanol
2 FNa sodium fluoride
3 H2O water
4 HNaO sodium hydroxide
5 C3H8O propan-2-ol
6 C3H8O propan-1-ol
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 - 1 ; Liquid mixture 1
  • Mass fraction - 2; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • 13
  • POMD
  • 1
  • 4
  • 3
  • Mass fraction - 1 ; 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
  • 14
  • POMD
  • 1
  • 4
  • 3
  • Mass fraction - 4 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 3
  • POMD
  • 6
  • 4
  • 3
  • 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
  • 63
  • POMD
  • 6
  • 4
  • 3
  • Mass fraction - 6 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 6 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 3
  • POMD
  • 5
  • 4
  • 3
  • Mass fraction - 5 ; 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
  • 57
  • POMD
  • 5
  • 4
  • 3
  • Mass fraction - 5 ; Liquid mixture 2
  • Mass fraction - 4 ; Liquid mixture 1
  • Mass fraction - 5 ; Liquid mixture 1
  • Mass fraction - 4; Liquid mixture 2
  • Temperature, K; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 2
  • Liquid mixture 1
  • OTHER
  • OTHER
  • OTHER
  • 3