Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Liquid phase equilibria of the system (water + phosphoric acid + 1-octanol) at T = (298.2, 308.2, and 318.2) K

Gilani, H. G., Gilani, A. G., Shekarsaraee, S., Uslu, H.
Fluid Phase Equilib. 2012, 316, 109-116
ABSTRACT
Experimental solubility and tie-line data for the ternary system of (water + phosphoric acid + 1-octanol) were measured at T = (298.2, 308.2, and 318.2) K and atmospheric pressure. Data for the binodal curves were determined by cloud-point titration method. The concentration of each phase was determined by acidimetric titration, the Karl Fischer technique, and refractive index measurements. A type-1 LLE phase diagram was obtained for this ternary system. The experimental tie-line data were correlated using the UNIQUAC and NRTL models. The reliability of the experimental data was determined through the Othmer-Tobias and Hand plots. Distribution coefficients and separation factors were evaluated over the immiscibility regions. The effect of temperature on the biphasic region of the ternary system and separation factor was found to be small at the temperatures studied. The Katritzky LSER model was applied to correlate distribution coefficients and separation factors in this ternary system.
Compounds
# Formula Name
1 H2O water
2 H3O4P phosphoric acid
3 C8H18O octan-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
  • 3
  • 2
  • 1
  • Mass fraction - 2 ; 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
  • 72
  • POMD
  • 3
  • 2
  • 1
  • Mass fraction - 2 ; Liquid mixture 1
  • Mass fraction - 1 ; Liquid mixture 2
  • Mass fraction - 2 ; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Mass fraction - 1; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 2
  • Liquid mixture 1
  • Liquid mixture 2
  • Titration method
  • Titration method
  • Titration method
  • 18