Selective Recovery of L-methionine Using Ion Exchange Membranes.

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  • Kojima Toshinori
    Department of Industrial Chemistry, Faculty of Engeneering, Seikei University
  • Yagi Shigekazu
    Department of Industrial Chemistry, Faculty of Engeneering, Seikei University
  • Motojima Kazue
    Department of Industrial Chemistry, Faculty of Engeneering, Seikei University
  • Nishijima Kazuhiro
    Department of Industrial Chemistry, Faculty of Engeneering, Seikei University
  • Matsukata Masahiko
    Department of Industrial Chemistry, Faculty of Engeneering, Seikei University

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Other Title
  • ドナン透析を用いたＬ‐メチオニンの選択的回収
  • ドナン トウセキ オ モチイタ L メチオニン ノ センタクテキ カイシュウ

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Abstract

Permeation rates of L-methionine and acethyl-DL-methionine were measured through ion exchange membranes into sodium chloride solution, assuming that the former was produced from the latter using a immobilized enzyme reactor. Both were permeated through an anion exchange membrane. L-methionine was selectively recovered from a L-methionine and acethyl-DL-methionine mixture by Donnan dialysis using a cation exchange membrane under the various pH conditions, however its rate was smaller than that through anion exchange membrane.<BR>At low pH, the permeation of hydrogen ion was dominant while that of L-methionine was suppressed. The flux of L-methionine attained to a maximum at pH 2 and decreased with increasing pH. Its mechanism was discussed based on ion exchange equilibrium at the interface and mass transfer in the boundary layer and membrane.

Journal

  • MEMBRANE

    MEMBRANE 18 (4), 237-247, 1993

    THE MEMBRANE SOCIETY OF JAPAN

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