Deinking of waste paper by treatment with starch degrading...

Details Deinking of waste paper by treatment with starch degrading... Deinking of waste paper by treatment with starch degrading...

D - Textiles, Paper

21

C

D21C 5/02 (2006.01) C12S 3/08 (2006.01) D21C 9/08 (2006.01) D21C 9/10 (2006.01)

Patent

CA 2177254

In the production of pulp and paper from starch-coated paper, the deinking effect can be improved by including a treatment a starch-degrading enzyme e.g. amylase or a debranching enzyme. The process comprises enzyme treatment before, during or after disintegration of the paper to produce pulp, followed by separation of ink particles.

Dans la production de la pâte à papier et du papier à partir de papier amidonné, l'effet de désencrage peut être amélioré au moyen d'un traitement supplémentaire utilisant une enzyme de décomposition de l'amidon telle que l'amylase ou une enzyme débranchante. Le procédé consiste à effectuer le traitement enzymatique avant, pendant ou après la désintégration du papier pour produire la pâte, et à séparer les particules de l'encre.

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