Modification of the commercial carrier in supported liquid membrane system to enhance lactic acid flux and to separate l,d-lactic acid enantiomers

Qian Yang, Tai-Shung Chung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Enhancement of lactic acid transmembrane flux through a supported liquid membrane system by using a modified carrier is first time demonstrated in this work. The results show that with the replacement of the chloride ion with a carbonate one in the commercial quaternary ammonium salt (Aliquat™ 336), the lactic acid fluxes are always higher at the correspondingly same volume ratio of extractants in kerosene. In addition, enhanced enantiomer separation of l,d-lactic acid mixtures is also achieved by adding β-cyclodextrin into the feed in the supported liquid membrane system. The separation factor is as high as 2.3 in both ideal and racemic mixture tests with an impressively high transmembrane flux.

Original languageEnglish (US)
Pages (from-to)127-131
Number of pages5
JournalJournal of Membrane Science
Volume294
Issue number1-2
DOIs
StatePublished - May 15 2007

Keywords

  • Aliquat™ 336
  • Enantioseparation
  • Modification
  • Supported liquid membrane
  • d,l-Lactic acid
  • β-Cyclodextrin

ASJC Scopus subject areas

  • Filtration and Separation
  • Polymers and Plastics

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