发明授权
- 专利标题: Method for co-pulping waste cellulosic material and wood chips
- 专利标题(中): 共制造废纤维素材料和木屑的方法
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申请号: US924360申请日: 1997-09-05
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公开(公告)号: US6017415A公开(公告)日: 2000-01-25
- 发明人: Richard B. Phillips , Linda A. Beltz , Craig Forehand , Wayne Christopherson , James A. McCann , Thomas E. Amidon , Jean J. Renard , Roger H. Purrington
- 申请人: Richard B. Phillips , Linda A. Beltz , Craig Forehand , Wayne Christopherson , James A. McCann , Thomas E. Amidon , Jean J. Renard , Roger H. Purrington
- 申请人地址: NY Purchase
- 专利权人: International Paper Company
- 当前专利权人: International Paper Company
- 当前专利权人地址: NY Purchase
- 主分类号: D21C3/00
- IPC分类号: D21C3/00 ; D21C5/02 ; D21B1/08
摘要:
A method wherein waste cellulosic material is used as an alternative fiber source during chemical pulping to replace a fraction of the wood chips. The waste cellulosic material is fed to the digester along with wood chips. The waste cellulosic material need not be repulped or slurried prior to digestion. The wood chips may be any species of hardwood or softwood. Normal chemical pulping charges, temperatures and cooking times applied in the case of 100% wood chip pulping may be used for the co-pulping of waste cellulosic material and wood chips. Thereafter, the pulp is processed as usual for chemical pulping, including the steps of blowing the digester, washing and thickening the brown stock, and bleaching the brown stock under the normal conditions used for the component co-pulped with the waste cellulosic material. Further screening or cleaning steps may be required to remove debris from waste cellulosic material.
公开/授权文献
- US5253345A Point of sale register system 公开/授权日:1993-10-12
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