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Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent

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  • Title:
    Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent
  • Author: Ni, Yonghao ; Li, Zhiqing
  • Description: A 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.
  • Creation Date: 2006
  • Language: English
  • Source: USPTO Issued Patents
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