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

Comparison of Extractability of Oxalic Acid from Dilute Aqueous Solutions Using Dioctylamine and Trioctylphosphine Oxide

Hasret, Erdem, Kirbaslar, Sah Ismail, Uslu, Hasan
J. Chem. Eng. Data 2019, 64, 3, 1275-1280
ABSTRACT
In this investigation, the reactive extraction of oxalic acid from its dilute solutions using trioctylphosphine oxide (TOPO) or dioctylamine (DOA) mixed with several solvents was studied to examine the most proper extractant mixture. The organic phase combinations were prepared by merging either TOPO or DOA with n-octane, 1-butanol, 1-decanol, methyl isobutyl ketone (MIBK), diisobutyl ketone (DIBK), diethyl sebacate (DES) respectively. The distribution coefficient, loading factor, and the extraction yield data were calculated for the interpretation of the results. It is found that in comparison with the physical extraction experiments performed with pure solvents, oxalic acid extraction from aqueous solutions can be improved significantly by introducing TOPO or DOA to the extractant composition. According to the results the maximum oxalic acid extraction is obtained with an extraction efficiency of 98.74 % and a distribution coefficient of 78.125 if 1.652 mol.kg-1 DOA dissolved in MIBK used as the extractant mixture. It can be inferred from using DOA instead of TOPO is given better results for the oxalic acid extraction, however an aggregate formation was observed with this extractant leading to the problems in the back extraction step of oxalic acid.
Compounds
# Formula Name
1 C4H10O butan-1-ol
2 C10H22O decan-1-ol
3 C6H12O 4-methylpentan-2-one
4 C9H18O 2,6-dimethyl-4-heptanone
5 C14H26O4 diethyl decanedioate
6 C8H18 octane
7 C2H2O4 ethanedioic acid
8 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
  • 7
  • 1
  • 8
  • Molality, mol/kg - 7 ; Liquid mixture 1
  • Molality, mol/kg - 7; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1
  • POMD
  • 7
  • 2
  • 8
  • Molality, mol/kg - 7 ; Liquid mixture 1
  • Molality, mol/kg - 7; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1
  • POMD
  • 7
  • 5
  • 8
  • Molality, mol/kg - 7 ; Liquid mixture 1
  • Molality, mol/kg - 7; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1
  • POMD
  • 7
  • 3
  • 8
  • Molality, mol/kg - 7 ; Liquid mixture 1
  • Molality, mol/kg - 7; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1
  • POMD
  • 7
  • 6
  • 8
  • Molality, mol/kg - 7 ; Liquid mixture 1
  • Molality, mol/kg - 7; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1
  • POMD
  • 7
  • 4
  • 8
  • Molality, mol/kg - 7 ; Liquid mixture 1
  • Molality, mol/kg - 7; Liquid mixture 2
  • Temperature, K; Liquid mixture 1
  • Pressure, kPa; Liquid mixture 1
  • Liquid mixture 1
  • Liquid mixture 2
  • titration
  • 1