Chlorine dioxide generation and pulp bleaching

Details Chlorine dioxide generation and pulp bleaching Chlorine dioxide generation and pulp bleaching

D - Textiles, Paper

21

C

9/17, 8/80

D21C 3/00 (2006.01) D21C 9/00 (2006.01) D21C 11/00 (2006.01)

Patent

CA 1053860

ABSTRACT OF THE DISCLOSURE A pulp mill procedure is described in which chlorine dioxide is formed in admixture with chlorine in a chlorine dioxide generation zone, the chlorine dioxide and chlorine are separated to provide an aqueous solution of chlorine dioxide wherein no more than 10% of the total available chlorine content is provided by chlorine, the aqueous solution of chlorine dioxide is used in a bleach plant to bleach pulp, the chlorine separated from the chlorine dioxide is used to form hydrogen chloride by reaction with hydrogen and hydrogen chloride is used in the chlorine dioxide generation.

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