Deinking and bleaching secondary fiber

D - Textiles – Paper – 21 – C

Patent

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9/1

D21C 5/02 (2006.01) B03D 1/00 (2006.01) D21B 1/08 (2006.01) D21C 9/02 (2006.01) D21C 9/12 (2006.01) D21C 9/147 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2023904

The brightness and bleachability of recycled secondary fiber is enhanced by subjecting the pulped fiber to washing in aqueous surfactant before and/or after treatment with oxygen-containing gas dispersed in an aqueous alkaline medium.

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