Chemical treatments in bleaching stages which increase pulp...

Details Chemical treatments in bleaching stages which increase pulp... Chemical treatments in bleaching stages which increase pulp...

D - Textiles, Paper

21

C

8/79

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

Patent

CA 1137256

ABSTRACT OF THE DISCLOSURE A method for increasing the final brightness of pulp contamin- ated with iron or manganese in a chlorine bleaching process of the type comprising one or more allcaline stages which comprises treating the pulp with at least 0.1 lbs. per ton of a water-soluble chelating agent.

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