Method for controlling enzymatic decomposition of peroxide...

D - Textiles – Paper – 21 – C

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D21C 5/00 (2006.01) C01B 15/037 (2006.01) D21C 9/10 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2743510

A method is described controlling enzymatic decomposition of peroxide comprising contacting a composition containing a peroxide decomposing enzyme with an aldehyde functional polymer added in an amount effective to control the enzyme. There also is a method described for bleaching cellulose pulp, such as recycled paper pulp or other pulps, with an aldehyde functional polymer introduced in an amount effective to control peroxide decomposing enzymes present in the pulp being bleached. Paper products containing the aldehyde functional polymer used to control peroxide decomposing enzymes in a bleaching treatment of cellulose pulp are also provided.

La présente invention concerne un procédé pour contrôler la décomposition enzymatique de peroxyde comprenant la mise en contact dune composition contenant une enzyme décomposant le peroxyde avec un polymère à aldéhyde fonctionnel ajouté en une quantité efficace pour contrôler lenzyme. La présente invention concerne en outre un procédé pour blanchir une pâte de cellulose, telle quune pâte de papier recyclé ou dautres pâtes, avec un polymère à aldéhyde fonctionnel introduit en une quantité efficace pour contrôler des enzymes décomposant le peroxyde présentes dans la pâte à blanchir. La présente invention concerne en outre des produits de papier contenant le polymère à aldéhyde fonctionnel utilisés pour contrôler les enzymes décomposant le peroxyde dans un traitement de blanchiment de pâte de cellulose.

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