PRODUCTION OF LEVEL-OFF DP CELLULOSE

PRODUCTION OF LEVEL-OFF DP CELLULOSE

Level-off DP cellulose which can be disaggregated in aqueous suspension on exposure to mechanical forces to give microcrystalline cellulose is prepared by partial hydrolysis of cellulose in such a way that the cellulose is partially hydrolysed in a pressure reactor with water under a gas pressure of...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: YURUGEN ZAIFUERUTO, MANFUREETO YOOZEFU BERUKUFUERUTO
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:Level-off DP cellulose which can be disaggregated in aqueous suspension on exposure to mechanical forces to give microcrystalline cellulose is prepared by partial hydrolysis of cellulose in such a way that the cellulose is partially hydrolysed in a pressure reactor with water under a gas pressure of 0.1 to 60 bar of oxygen and/or carbon dioxide, measured at 20 DEG C, at a temperature of 100 to 200 DEG C until the levelling-off DP is reached. The partial hydrolysis is preferably carried out under a gas pressure of 0.5 to 30 bar, measured at 20 DEG C, and in a temperature range of 140 to 180 DEG C.