Improved bleaching of high consistency lignocellulosic pulp

Details Improved bleaching of high consistency lignocellulosic pulp Improved bleaching of high consistency lignocellulosic pulp

D - Textiles, Paper

21

C

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

Patent

CA 2144433

The present invention pertains to a method having increased selectivity for bleaching lignocellulosic pulp having a high consistency from a first GE brightness to a second, higher GE brightness which comprises the steps of (a) flumng the high con- sistency pulp having the first GE brightness to a specific surface area of at least about 90m2/kg; and (b) contacting the fluffed pulp with a gaseous bleaching agent to form a bleached pulp having the second, higher GE brightness. The present inven- tion also pertains to a bleached lignocellulosic pulp prepared by the method of the present invention.

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