Brightness improvement of ozone bleached pulps

D - Textiles – Paper – 21 – C

Patent

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D21C 9/10 (2006.01) D21C 9/16 (2006.01)

Patent

CA 1154205

ABSTRACT OF THE DISCLOSURE Use of hydrosulfite in the alkaline extraction stage of oxygen-ozone bleached kraft paper pulp results in improved brightness and reverted brightness of the pulp.

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