Concentration of amino acids by a liquid emulsion membrane with a cationic extractant

Seong Ahn Hong, Hyung Joon Choi, Suk Woo Nam

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The concentration of l-phenylalanine in a liquid emulsion membrane system was studied using a cation complexing agent, di-2-ethylhexyl phosphoric acid (D2EHPA), as a carrier. The membrane formulation, the pH in the internal phase of the acid concentration in the external phase were optimized with respect to concentration performance and membrane stability. It was found that a liquid emulsion membrane obtained by demulsification of the emulsion by an electrostatic coalescer could be reused. Based on the laboratory tests, a continuous multistage process for the concentration of amino acids was proposed (with the development of a commercial process in mind) and its technical feasibility was discussed.

Original languageEnglish
Pages (from-to)225-235
Number of pages11
JournalJournal of Membrane Science
Issue number2-3
Publication statusPublished - 1992 Jun 17


  • amino acid concentration
  • cationic extractant
  • demulsification
  • liquid emulsion membrane
  • membrane stability

ASJC Scopus subject areas

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation


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