Method of bleaching chemical paper pulp

Details Method of bleaching chemical paper pulp Method of bleaching chemical paper pulp

D - Textiles, Paper

21

C

D21C 9/16 (2006.01) C12S 3/08 (2006.01) D21C 9/10 (2006.01)

Patent

CA 2176246

Method of bleaching chemical paper pulp having undergone extensive cooking, involving a sequence of processing steps carried out without chlorine reagents. The pulp is subjected to decontamination from its transition metals and then to a step using alkaline hydrogen peroxide.

Procédé pour le blanchiment d'une pâte à papier chimique, ayant subi une cuisson extensive, au moyen d'une séquence d'étapes de traitement exemptes de réactifs chlorés consistant à effectuer, dans l'ordre, une étape de décontamination de la pâte en ses métaux de transition et une étape au peroxyde d'hydrogène alcalin.

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