METHOD FOR THE PRODUCTION OF LOW-VISCOUS WATER-SOLUBLE CELLULOSE ETHERS

METHOD FOR THE PRODUCTION OF LOW-VISCOUS WATER-SOLUBLE CELLULOSE ETHERS

Disclosed is a method for producing low-viscuous water-soluble cellulose ethers by oxidative degradation of higher viscuous cellulose ethers with hydrogen peroxide. The higher viscuous cellulose ether is intensely mixed with an aqueous solution of hydrogen peroxide at temperatures of 65-125 .degree....

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: SCHLESIGER, HARTWIG
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
DERIVATIVES THEREOF
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
POLYSACCHARIDES
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:Disclosed is a method for producing low-viscuous water-soluble cellulose ethers by oxidative degradation of higher viscuous cellulose ethers with hydrogen peroxide. The higher viscuous cellulose ether is intensely mixed with an aqueous solution of hydrogen peroxide at temperatures of 65-125 .degree.C. The mixing ratio is chosen in such a way that the quantity of hydrogen peroxide is 0.1-10 wt. % in relation to the dry cellulose ether, that the solids content of the mixture is not lower than 25 wt. % in relation to the whole quantity of the mixture and that the mixture is then kept in motion at temperatures of 65-125 .degree.C until at least approximately 90 % of the hydrogen peroxide is used.