Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Single-component and mixture solubilities of ethyl p-hydroxybenzoate and ethyl p-aminobenzoate in supercritical CO2

Li, W.[Wenqing], Jin, J.[Junsu], Tian, G.[Guohua], Zhang, Z.[Zhiying]
Fluid Phase Equilib. 2008, 264, 1-2, 93-98
ABSTRACT
The solubility of ethyl p-hydroxybenzoate, ethyl p-aminobenzoate in supercritical carbon dioxide was determined at (308, 318, 328 K) in the pressure range from 8 to 21MPa in the case of pure ethyl p-hydroxybenzoate and pure ethyl p-aminobenzoate and for equalmolar mixtures of ethyl p-hydroxybenzoate and ethyl p-aminobenzoate. Experimental results show that in the binary systems the solubility of ethyl p-hydroxybenzoate was around one order of magnitude lower than that of ethyl p-aminobenzoate. In the ternary system the solubility of ethyl p-hydroxybenzoate was enhanced more significantly. This selectivity enhancement is larger at lower temperature and higher pressure. The binary and ternary solubility data were correlated using the Chrastil model with satisfactory agreement.
Compounds
# Formula Name
1 CO2 carbon dioxide
2 C9H10O3 ethyl 4-hydroxybenzoate
3 C9H11NO2 ethyl 4-aminobenzoate
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
  • 2
  • 1
  • Mole fraction - 2 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 2
  • Chromatography
  • 15
  • POMD
  • 3
  • 1
  • Mole fraction - 3 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 3
  • Chromatography
  • 15
  • POMD
  • 3
  • 2
  • 1
  • Mole fraction - 3 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 3
  • Crystal - 2
  • Chromatography
  • 15
  • POMD
  • 3
  • 2
  • 1
  • Mole fraction - 2 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 3
  • Crystal - 2
  • Chromatography
  • 15