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

Reactive Extraction of Gallic Acid Using Tributyl Phosphate in Different Classes of Diluents

Joshi, N.[Nishant], Keshav, A.[Amit], Poonia, Anil. K.
J. Chem. Eng. Data 2019, 64, 6, 2826-2835
ABSTRACT
Phenolic acids like gallic acid are very important for the pharmaceutical industries as they possess medicinal properties like anti-oxidant, anti-carcinogenic and anti-mutagenic properties. The separation of gallic acid from fermentation broth and dilute aqueous streams is a challenging task. Therefore in the present study reactive extraction of gallic acid from an aqueous solution by using tributyl phosphate in octanol, ethyl acetate, n-hexane and toluene as diluents, respectively has been carried out at constant temperature (303 1 K). The results were compared with extraction using pure diluents in order to compute the intensification of extraction obtained. Initial acid concentration (0.01-0.06 mol*kg-1), extractant concentration (0.379-1.516 mol*kg-1), and type of diluent were used as investigation variables. Highest distribution coefficient (KD =24) was obtained using 1.516 mol*kg-1 TBP (in hexane), with 96 % removal from aqueous media. It was observed that the combination of TBP with n hexane offers highest distribution coefficient when compared with others. The equilibrium complexation constant, KE, was observed to be in the ranges of 3.18-8.8 for n hexane, 0.914.54 for toluene, 5.75-12.60 for ethyl acetate, 3.57-6.17 for octanol .
Compounds
# Formula Name
1 C7H6O5 3,4,5-trihydroxybenzoic acid
2 C8H18O octan-1-ol
3 C4H8O2 ethyl acetate
4 C6H14 hexane
5 C7H8 toluene
6 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
  • 1
  • 2
  • 6
  • Molality, mol/kg - 1 ; Liquid mixture 1
  • Molality, mol/kg - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • UV spectroscopy
  • 6
  • POMD
  • 1
  • 3
  • 6
  • Molality, mol/kg - 1 ; Liquid mixture 1
  • Molality, mol/kg - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • UV spectroscopy
  • 6
  • POMD
  • 1
  • 4
  • 6
  • Molality, mol/kg - 1 ; Liquid mixture 1
  • Molality, mol/kg - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • UV spectroscopy
  • 6
  • POMD
  • 1
  • 5
  • 6
  • Molality, mol/kg - 1 ; Liquid mixture 1
  • Molality, mol/kg - 1; Liquid mixture 2
  • Pressure, kPa; Liquid mixture 1
  • Temperature, K; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • UV spectroscopy
  • 6