PRODUCTION OF WATER-SOLUBLE CHITOSAN

PRODUCTION OF WATER-SOLUBLE CHITOSAN

PURPOSE:To obtain a water-soluble chitosan of a molecular weight of 1500-30000 by reacting chitosan with peracetic acid. CONSTITUTION:Chitosan is reacted with an aqueous peracetic acid solution while blowing oxygen or air into the reaction system. The starting chitosan is split into low-molecular we...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HAMAMOTO YOSHITO, INOUE TADAMORO
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
DERIVATIVES THEREOF
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
POLYSACCHARIDES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:PURPOSE:To obtain a water-soluble chitosan of a molecular weight of 1500-30000 by reacting chitosan with peracetic acid. CONSTITUTION:Chitosan is reacted with an aqueous peracetic acid solution while blowing oxygen or air into the reaction system. The starting chitosan is split into low-molecular weight chitosan of a molecular weight of 1500-30000 by setting the weight ratio of the peracetic acid to the chitosan at 3-15 and controlling it by adding water to the reactional system in mid course of the reaction. Thus, it becomes possible to obtain a water-soluble chitosan in high yield while the amount of the peracetic acid used can be reduced as well as to react chitosan directly with peracetic acid.