ドナン透析を用いたＬ‐メチオニンの選択的回収

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書誌事項

タイトル別名
  • Selective Recovery of L-methionine Using Ion Exchange Membranes.
  • 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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抄録

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.

収録刊行物

  • 膜

    膜 18 (4), 237-247, 1993

    日本膜学会

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