Enzymatic treatment of paper making pulps

Details Enzymatic treatment of paper making pulps Enzymatic treatment of paper making pulps

D - Textiles, Paper

21

C

D21C 5/00 (2006.01)

Patent

CA 2521638

The invention relates to processes for treating a pulp, and for making a paper material such as paper, cardboard, linerboard, corrugated paperboard, tissue, towels, corrugated containers, boxes etc., these processes comprising an alkaline treatment of a pulp, a treatment with a pectin lyase and/or a pectate lyase, and, if desired, a draining of the pulp. Pectate lyase in combination with pectinesterase may be substituted for pectin lyase. The invention also relates to the use of xylanase, pectin lyase, pectate lyase, and/or the combination of pectate lyase with pectinesterase for anionic trash reduction and/or reduction of cationic demand of a paper pulp.

L'invention concerne des procédés destinés au traitement d'une pâte et à la fabrication d'une matière à base de papier, tel que du papier, du carton, du carton doublure, du carton ondulé, du papier mouchoir, des serviettes, des boîtes en carton ondulé, des cartons, etc., consistant à soumettre une pâte à un traitement alcalin, à un traitement à base de pectine lyase et/ou de pectate lyase, puis, éventuellement, à égoutter la pâte. La pectate lyase combinée à de la pectine estérase peut remplacer la pectine lyase. L'invention concerne également l'utilisation de xylanase, de pectine lyase, de pectate lyase, et/ou d'une combinaison de pectate lyse et de pectine estérase pour réduire la quantité de déchets anioniques et/ou réduire la demande cationique d'une pâte à papier.

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