Hydrogen peroxide reinforced oxygen delignification

Details Hydrogen peroxide reinforced oxygen delignification Hydrogen peroxide reinforced oxygen delignification

D - Textiles, Paper

21

C

8/78.1, 9/16.5

D21C 9/147 (2006.01) D21C 3/02 (2006.01) D21C 9/10 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2014563

HYDROGEN PEROXIDE REINFORCED OXYGEN DELIGNIFICATION A process is provided for a two-stage oxygen delignification of chemical pulp in which 0.01% to 1% hydrogen peroxide is incorporated into the first and, optionally the second stage. The invention is parti- cularly suitable when the pulp is subsequently bleached with at least one chlorine dioxide stage and at least one hydrogen peroxide stage.

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