Process for the chlorine-free bleaching and delignification...

Details Process for the chlorine-free bleaching and delignification... Process for the chlorine-free bleaching and delignification...

D - Textiles, Paper

21

C

9/22

D21C 1/08 (2006.01) D21C 9/10 (2006.01) D21C 9/147 (2006.01) D21C 9/153 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2036173

The present invention provides a process for the chlorine- free bleaching and delignification of cellulose pre-bleached with oxygen and peroxide or oxygen and or ozone, wherein the pre-bleached cellulose is treated twice with peroxide activated by cyanamide and/or a cyanamide salt.

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