发明申请
- 专利标题: METHOD FOR MANUFACTURING PAPERMAKING PULP
- 专利标题(中): 制造造纸纸浆的方法
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申请号: US13125466申请日: 2009-10-23
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公开(公告)号: US20120118518A1公开(公告)日: 2012-05-17
- 发明人: Christophe Calais , Jean-Christophe Hostachy
- 申请人: Christophe Calais , Jean-Christophe Hostachy
- 优先权: FR0805907 20081024
- 国际申请: PCT/IB2009/007208 WO 20091023
- 主分类号: D21C1/00
- IPC分类号: D21C1/00
摘要:
The invention relates to a method for manufacturing papermaking pulp, including: a step of refining wood, including an ozone treatment, so as to obtain a mechanical pulp; a deacidification step including placing the mechanical pulp in contact with a deacidification composition including at least one alkaline agent for more than one hour; and a bleaching step including placing the deacidified pulp in contact with a bleaching composition; wherein the pH varies by less than 0.2 point during the last 30 minutes of the deacidification step, and the pH is 6. to 10 at the end of the deacidification step.