Process for enzymatic bleaching of celluloses

Details Process for enzymatic bleaching of celluloses Process for enzymatic bleaching of celluloses

C - Chemistry, Metallurgy

12

S

C12S 3/08 (2006.01) D21C 5/00 (2006.01) D21C 9/10 (2006.01) D21C 9/147 (2006.01) D21C 9/153 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2078345

ABSTRACT The present invention concerns a process for the enzy- matical bleaching of celluloses wherein a) a redox potential in the range between 200 and 500 mV is adjusted while metered addition of oxidants and reductives and addition of salts and complexing agents to an aqueous solution containing cellulose takes place simultaneously, b) a bleaching reaction is started by addition of lig- nolytical enzymes and c) the reaction is maintained for a period of 15 mi- nutes up to 12 hours during which time it is con- stantly stirred.

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