Process for the low chlorine bleaching and delignification...

Details Process for the low chlorine bleaching and delignification... Process for the low chlorine bleaching and delignification...

D - Textiles, Paper

21

C

D21C 9/16 (2006.01) D21C 9/10 (2006.01)

Patent

CA 2052758

Abstract Process for the low chlorine bleaching and delignif- ication of cellulose The present invention provides a process for the low chlorine bleaching and delignification of cellulose, wherein a cellulose which has been pre-bleached with an at least two-step bleaching sequence is mixed separately in an extractive end bleach with an aqueous solution of cyanamide and an alkaline solution of hydrogen peroxide. In this way, cellulose can be produced with a high degree of whiteness in a chlorine-free end bleach.

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