Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Binary and ternary solubility of amino- and nitro-benzoic acids in supercritical carbon dioxide

Li, Y.[Ying], Tang, Z.[Zhao], Jin, J.[Junsu], Zhang, Z.[Zeting]
Fluid Phase Equilib. 2013, 344, 71-78
ABSTRACT
In this paper, the solubility of 3-aminobenzoic acid (3-ABA) in supercritical carbon dioxide (SCCO2) was measured in a flow-type apparatus at temperatures of 308, 318, and 328 K within the pressure range of 10.0 21.0 MPa. Moreover, the solubility of the mixture of 3-ABA and 3-nitrobenzoic acid (3-NBA) with mass ratio of 1:1 was also investigated under the same condition. Its solubility reduction factor (SE), separation efficiency (HE) and mixture separation factor ( ) were also studied. Furthermore, a modified Bartle model was proposed for correlating the solubility of the solid chemicals in SCCO2 with solvent density and experimental temperature. The accuracy of the modified and the traditional Bartle model was compared by data from experiment and literature, in which 1106 solubility data points of two solutes in experiments and 49 solutes in literature were considered. The calculation results showed that the modified Bartle model can give a better prediction on the solubility of different solid solutes in SCCO2 than the traditional one.
Compounds
# Formula Name
1 C7H7NO2 3-aminobenzoic acid
2 C7H5NO4 3-nitrobenzoic acid
3 CO2 carbon dioxide
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
  • 3
  • Mole fraction - 1 ; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal - 1
  • UV Spectrophotometry
  • 15
  • POMD
  • 1
  • 2
  • 3
  • Mole fraction - 2 ; Fluid (supercritical or subcritical phases)
  • Temperature, K; Fluid (supercritical or subcritical phases)
  • Pressure, kPa; Fluid (supercritical or subcritical phases)
  • Mole fraction - 1; Fluid (supercritical or subcritical phases)
  • Fluid (supercritical or subcritical phases)
  • Crystal
  • UV Spectrophotometry
  • 15