Peroxide bleaching of wood pulp

Details Peroxide bleaching of wood pulp Peroxide bleaching of wood pulp

D - Textiles, Paper

21

C

D21C 9/16 (2006.01)

Patent

CA 2441841

There is provided a new and useful process for peroxide bleaching of mechanical or high yield pulp, the process comprising adding to a pulp slurry at least one stabilizer for stabilizing low valency states of transition metal ions in the slurry; subsequently adding caustic soda to said slurry simultaneously with or subsequent to adding said at least one stabilizer; adding hydrogen peroxide to the slurry at a preselected point; and subjecting the slurry to preselected conditions to complete the bleaching process.

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