Equilibrium studies of the extraction and re-extraction of lactic acid

J. L. Maisuria, Md Monwar Hossain

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9 Citations (Scopus)


Equilibrium studies on the extraction of lactic acid in various organic phases and its re-extraction into aqueous solutions have been carried out. This includes a variety of experimental situations: using only solvents, single carriers with solvent, mixed carriers with solvent and with mixed solvents. The organic phase consists of a carrier (or a mixture of carrier) dissolved in a solvent (or a mixture of solvents). The extraction and re-extraction processes have been characterized by using distribution coefficient for the respective processes. The values of the distribution coefficient have been obtained by varying the operating conditions (i) for extraction: feed solution pH, types of carrier and its concentrations, solvent and its concentration in the organic phase; and (ii) for re-extraction: the type, pH, and concentration of recovery solution. It was found that 20 wt % of trioctylamine (an ionic carrier) dissolved in tributyl phosphate (an active solvent) was found to be the best extracting phase. For re-extraction, an aqueous solution of sodium carbonate gave the best recovery from the organic phase.

Original languageEnglish
Pages (from-to)665-670
Number of pages6
JournalJournal of Chemical and Engineering Data
Issue number3
Publication statusPublished - May 2007
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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