METHOD FOR PRODUCING PYRROLIDONECARBOXYLIC ACID OR SALT THEREOF

Provided is a method for producing pyrrolidonecarboxylic acid or a salt thereof with high chemical and optical purity efficiently in a short time under normal pressure in an industrially simple manner by thermal cyclization of glutamic acid in a solution containing pyrrolidonecarboxylic acid. L'...

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Bibliographische Detailangaben
Hauptverfasser:	ITO, MIKA, YUMIOKA, RYOSUKE, OGAWA, CHIKA, NOGUCHI, YASUNOBU, TAKAHASHI, SATOJI
Format:	Patent
Sprache:	eng ; fre ; jpn
Schlagworte:	ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES CANDLES CHEMISTRY DETERGENT COMPOSITIONS DETERGENTS FATTY ACIDS THEREFROM HETEROCYCLIC COMPOUNDS HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC CHEMISTRY PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES RECOVERY OF GLYCEROL RESIN SOAPS SOAP OR SOAP-MAKING SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS USE OF SINGLE SUBSTANCES AS DETERGENTS
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Beschreibung
Zusammenfassung:	Provided is a method for producing pyrrolidonecarboxylic acid or a salt thereof with high chemical and optical purity efficiently in a short time under normal pressure in an industrially simple manner by thermal cyclization of glutamic acid in a solution containing pyrrolidonecarboxylic acid. L'invention porte sur un procédé de production d'acide pyrrolidonecarboxylique ou d'un sel de ce dernier, présentant une pureté chimique et optique élevée, d'une manière efficace en un bref laps de temps à la pression normale d'une manière simple du point de vue industriel, par cyclisation thermique d'acide glutamique dans une solution contenant de l'acide pyrrolidonecarboxylique.