Bleach hydrolysis of pulp with substantially reduced use of...

Details Bleach hydrolysis of pulp with substantially reduced use of... Bleach hydrolysis of pulp with substantially reduced use of...

D - Textiles, Paper

21

C

8/78

D21C 9/12 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1080406

ABSTRACT OF THE DISCLOSURE The present invention provides in a multistage process for fully bleaching a pulp using a minimum of chlorine, the improvement in which the first stage comprises an alkaline peroxide bleach hydrolysis in which stage the pulp is bleached with a content of alkali of 0.5 to 3% by weight, calculated as a 100% substance and relative to absolutely dry pulp, and at a temperature of the bleaching liquor of at least 65°C.

245088

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