Title:
METHOD FOR PRODUCING DIAMINE DICARBOXYLIC ACID SALT
Document Type and Number:
Japanese Patent JP2004203837
Kind Code:
A
Abstract:
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.
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.
Inventors:
MIMIZUKA TAKASHI
YAMADA MASANARI
YAMADA MASANARI
Application Number:
JP2002377239A
Publication Date:
July 22, 2004
Filing Date:
December 26, 2002
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
C07C209/86; C07C51/43; C07C55/10; C07C55/14; C07C55/20; C07C55/21; C07C63/24; C07C63/26; C07C211/09; C07C211/12; C07C211/27; (IPC1-7): C07C209/86; C07C51/43; C07C55/10; C07C55/14; C07C55/20; C07C55/21; C07C63/24; C07C63/26; C07C211/09; C07C211/12; C07C211/27