Equilibrium studies on reactive extraction of lactic acid with an amine extractant

Ruey Shin Juang*, Ren Hour Huang

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

106 Scopus citations


Equilibrium studies on the extraction of lactic acid from aqueous solutions with tri-n-octylamine (TOA) in xylene were made in the temperature range 293-323 K. The formulation of the extracted species in the organic phase and the corresponding equilibrium constants were numerically determined at different temperatures. Also, the apparent thermodynamic functions were calculated. Finally, the effect of a water-insoluble organic acid, di(2-ethylhexyl) phosphoric acid (D2EHPA), on this extraction was investigated. Synergistic and antagonistic effects were observed in the presence of D2EHPA, mainly depending on the concentration ratio of D2EHPA to TOA.

Original languageEnglish
Pages (from-to)47-53
Number of pages7
JournalChemical Engineering Journal
Issue number1
StatePublished - 15 01 1997
Externally publishedYes


  • Di(2-ethylhexyl) phosphoric acid
  • Equilibrium
  • Lactic acid
  • Reactive extraction
  • Synergistic effect
  • Tri-n-octylamine


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