Process for making bleached high yield paper pulp

Details Process for making bleached high yield paper pulp Process for making bleached high yield paper pulp

D - Textiles, Paper

21

C

D21C 1/06 (2006.01) D21B 1/02 (2006.01) D21C 1/08 (2006.01) D21C 9/10 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2066316

L'invention concerne la fabrication de pâte à papier à haut rendement à partir de copeaux de bois. Le procédé consiste à traiter successivement les copeaux, avant défibrage, par une solution contenant au moins un agent réducteur, puis par une solution alcaline de peroxyde d'hydrogène. Application à la fabrication de pâtes à papier ayant un degré élevé de blancheur et de bonnes caractéristiques mécaniques.

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