Pulp bleaching reactor and method

Details Pulp bleaching reactor and method Pulp bleaching reactor and method

D - Textiles, Paper

21

C

D21C 9/153 (2006.01) B01F 15/00 (2006.01) D21C 9/10 (2006.01)

Patent

CA 2069436

An apparatus and method for delignifying and bleaching a lignocellulosic pulp without the use of elemental chlorine. The bleaching reactor is a horizontal vessel having a central rotatable shaft which preferably contains paddles, cut and folded screw flights or a ribbon flight, to disperse and advance the pulp particles in a plug flow manner while contacting and mixing the pulp particles with a gaseous bleaching agent such as ozone for substantially uniform bleaching thereof.

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