Process for recovering L-amino acid from fermentation liquors
AssigneeAjimomoto Co., Inc.
InventorsShigenori Mori, Kinzo Iitani, Masaki Yamamoto, Masashi Miyazawa, Toyokazu Kaneko, Tetsuya Kaneko, Ken-ich Yarita
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Abstract
A process for recovering a high-purity L-amino acid from a fermentation liquor obtained by fermentation or an enzymic method, which comprises removing the impurities contained in said fermentation liquor by passing said fermentation liquor through an ultrafilter membrane and then through an ion-exchange or adsorbent resin; concentrating or cooling the effluent thus obtained to result in crystallization of said L-amino acid, and isolating said crystalline L-amino acid from said fermentation liquor.
Claims11
A process for recovering a high purity L-glutamine from a fermentation liquor obtained by fermentation or an enzymic method, which comprises removing the impurities contained in said fermentation liquor by passing said fermentation liquor through an ultrafilter membrane and then through an adsorbent resin selected from the group consisting of weakly basic anion-exchange resins and amphoteric ion-exchange resins;
- concentrating or cooling the effluent thus obtained to result in crystallization of said L-glutamine, and isolating said crystalline L-glutamine from said fermentation liquor.
Dependencies are inferred from the claim text.