Process for producing amino acids

  • US RE45,723 E1
  • Filed: 07/11/2014
  • Issued: 10/06/2015
  • Est. Priority Date: 04/12/2005
  • Status: Active Grant
First Claim
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1. A process for producing an amino acid, which comprises:

  • culturing a microorganism having an ability to produce the amino acid in a medium,adding crystals of the amino acid having an average particle size of 1 to 120 7 to 50 μ

    m to a the medium at some time after the amino acid concentration in the medium reaches the saturation solubility and before crystals of the amino acid deposit in the medium so that the concentration of the crystals of the amino acid becomes 0.5 g/l or more,culturing a the microorganism having the ability to produce the amino acid in the medium,allowing the crystals of the amino acid to form grow to crystals of the amino acid having an average particle size of 30 μ

    m or more and accumulate in the medium, andrecovering the crystals of the amino acid from the culture by separating the microorganism producing the amino acid and the accumulated crystals of the amino acid based on the difference in particle size or specific gravity between them.

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