Multistage brightening of high yield and ultra high- yield...

Details Multistage brightening of high yield and ultra high- yield... Multistage brightening of high yield and ultra high- yield...

D - Textiles, Paper

21

C

8/82

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

Patent

CA 1249402

ABSTRACT OF THE DISCLOSURE A multistage process for bleaching high yield and ultra high-yield pulps is described whereby the pulp is treated sequentially with a peroxygen compound, a reducing compound and a final peroxygen compound to achieve higher brightness levels.

470961

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