Oxygen delignification and enzyme treatment

Details Oxygen delignification and enzyme treatment Oxygen delignification and enzyme treatment

D - Textiles, Paper

21

C

260/133, 195/60

D21C 9/147 (2006.01) C12N 9/24 (2006.01) C12S 3/08 (2006.01) D21C 5/00 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1339504

Process for bleaching lignocellulosic material comprising an oxygen bleaching treatment and an enzymatic treatment with a substantially cellulase-free xylanase, which process is compatible with, and can be incorporated into, conventional bleaching sequences. The process provides a delignified and bleached pulp using lower amounts of chlorine-containing compounds, and the opportunity of eliminating the use of elemental chlorine, thereby reducing the polluting effluent from a pulp mill employing the process. Also, a greater extent of delignification can be achieved while retaining acceptable pulp strength properties.

613965

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