Abstract
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 language | English |
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Pages (from-to) | 47-53 |
Number of pages | 7 |
Journal | Chemical Engineering Journal |
Volume | 65 |
Issue number | 1 |
DOIs | |
State | Published - 15 01 1997 |
Externally published | Yes |
Keywords
- Di(2-ethylhexyl) phosphoric acid
- Equilibrium
- Lactic acid
- Reactive extraction
- Synergistic effect
- Tri-n-octylamine