Process for the oxygen delignification of pulp

Details Process for the oxygen delignification of pulp Process for the oxygen delignification of pulp

D - Textiles, Paper

21

C

92/60.1, 9/16.5

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

Patent

CA 1176408

RFN 7089 PROCESS AND APPARATUS FOR THE OXYGEN DELIGNIFICATION OF PULP Abstract of the Disclosure A medium consistency oxygen delignification process and apparatus are provided utilizing one or more substantially horizontal agitated tubular reac- tion zones. The process produces rapid delignifica- tion rates at low alkali charges, minimizes oxygen requirements, and yields pulps having high viscosi- ties. The use of rotary screws or paddles in the reaction zone or zones provides the agitation required to enable good mixing of oxygen with the medium consistency pulp and alkaline chemicals as well as controlling the pulp retention time in each reaction zone.

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