| abstract |
To provide an industrial purification method of PDC obtained by fermentative production. n A method of purifying 2-pyrone-4,6-dicarboxylic acid which comprises including a salt of monovalent to tetravalent cations in a fermentation liquid containing microbially-produced 2-pyrone-4,6-dicarboxylic acid; and a method of purifying 2-pyrone-4,6-dicarboxylic acid which method comprises extracting 2-pyrone-4,6-dicarboxylic acid from a fermentation liquid containing microbially-produced 2-pyrone-4,6-dicarboxylic acid without forming 2-pyrone-4,6-dicarboxylate. |