Process for bleaching and delignifying chemical paper pulp

Details Process for bleaching and delignifying chemical paper pulp Process for bleaching and delignifying chemical paper pulp

D - Textiles, Paper

21

C

D21C 9/16 (2006.01) D21C 3/02 (2006.01) D21C 9/10 (2006.01) D21C 9/147 (2006.01) D21C 9/153 (2006.01)

Patent

CA 2110698

Process for bleaching and delignifying chemical paper pulp in three stages: a first stage in which the pulp is subjected to gaseous oxygen, followed by two stages in which gaseous ozone and peroxymonosulphuric acid or one of its salts are used in any order.

2110698 9221814 PCTABS00160 Procédé pour le blanchiment et la délignification d'une pâte à papier chimique consistant à soumettre la pâte à un traitement en trois étapes comprenant une première étape au moyen d'oxygène gazeux suivie par deux étapes avec, respectivement et dans un ordre indifférent, de l'ozone gazeux et de l'acide peroxymonosulfurique ou l'un de ses sels.

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