Preparation of cellulosic materials

Details Preparation of cellulosic materials Preparation of cellulosic materials

C - Chemistry, Metallurgy

11

D

C11D 7/42 (2006.01) C11D 3/386 (2006.01) D06L 3/02 (2006.01) D06L 3/11 (2006.01)

Patent

CA 2450709

The present invention provides methods and compositions for desizing, scouring and bleaching of cellulosic materials, which are carried out by contacting the cellulosic materials simultaneously or sequentially in a single-bath process with an enzyme system and a bleaching system comprising hydrogen peroxide or at least one peroxy compound which generates hydrogen peroxide when dissolved in water, or combinations thereof, and at least one bleach activator.

L'invention concerne des procédés et des compositions de désencollage, de dégommage et de blanchiment de matières cellulosiques. Ces procédés consistent à mettre en contact les matières cellulosiques, simultanément ou séquentiellement dans un processus en bain unique, avec un système enzymatique et un système de blanchiment. Le système de blanchiment comprend du peroxyde d'hydrogène ou au moins un composé peroxyde générant du peroxy d'hydrogène lorsqu'il est dissous dans l'eau, ou des combinaisons de celui-ci, et au moins un activateur de blanchiment.

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