METHOD OF LOWERING MOLECULAR WEIGHT OF POLYSACCHARIDE

METHOD OF LOWERING MOLECULAR WEIGHT OF POLYSACCHARIDE

PROBLEM TO BE SOLVED: To obtain efficiently an oligomer with a mol.wt. of several hundred thousand by lowering a mol.wt. of a polysaccharide efficiently in a short period of time with a simple operation of a physical treatment instead of a chemical treatment preventing the polysaccharide from becomi...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: SHINPO YOSHIMASA, KIMIZU MITSUGI, SAKURAI KENSHI, MATSUKAWA SHINYA
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
DERIVATIVES THEREOF
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
POLYSACCHARIDES
THEIR PREPARATION OR CHEMICAL WORKING-UP
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To obtain efficiently an oligomer with a mol.wt. of several hundred thousand by lowering a mol.wt. of a polysaccharide efficiently in a short period of time with a simple operation of a physical treatment instead of a chemical treatment preventing the polysaccharide from becoming monosaccharides such as glucosamine especially when it is chitin or chitosan. SOLUTION: An operation of a molecular weight decrease is carried out by treating the polysaccharide for depolymerization under the condition of an extreme high pressure of 1,000-4,000 atm. for 10-30 min. In this operation a depolymerization temperature is kept at 0-200 deg.C and sodium perborate can be used as a peroxide agent.