Process for bleaching a chemical pulp

Details Process for bleaching a chemical pulp Process for bleaching a chemical pulp

D - Textiles, Paper

21

C

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

Patent

CA 2175817

Process for bleaching a chemical pulp through a sequence of processing steps comprising, in this order, a step for decontaminating the pulp by removing its transition metals, an alcaline hydrogen peroxide processing step and a processing step using a non peroxygenated acid.

Procédé pour le blanchiment d'une pâte à papier chimique au moyen d'une séquence d'étapes de traitement consistant à effectuer dans l'ordre, une étape de décontamination de la pâte en ses métaux de transition, une étape au peroxyde d'hydrogène alcalin et une étape avec un acide non peroxygéné.

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