METHOD FOR PRODUCING DIAMINE DICARBOXYLIC ACID SALT

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a diamine dicarboxylic acid salt by separating the salt from an aqueous solution of the diamine dicarboxylic acid salt containing amino acids. SOLUTION: The diamine dicarboxylic acid salt is crystallized from an organic solvent by concentrating an aqueous solution of the diamine dicarboxylic acid salt containing amino acids and adding the organic solvent to the solution to selectively dissolve the diamine dicarboxylic acid salt in the organic solvent. COPYRIGHT: (C)2004,JPO&NCIPI