发明授权
- 专利标题： Method of brown stock washing
- 专利标题（中）： 棕色洗涤方法
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申请号： US117449申请日： 1987-11-04
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公开(公告)号： US4810328A公开(公告)日： 1989-03-07
- 发明人: Richard E. Freis , James E. Maloney , Thomas R. Oakes
- 申请人： Richard E. Freis , James E. Maloney , Thomas R. Oakes
- 申请人地址： OH Painesville
- 专利权人： Diamond Shamrock Chemicals Company
- 当前专利权人： Diamond Shamrock Chemicals Company
- 当前专利权人地址： OH Painesville
- 主分类号： D21C9/02
- IPC分类号： D21C9/02
摘要：
An improved method of brown stock washing is disclosed. A nonionic surfactant in combination with a polyelectrolyte dispersant, and preferably a solvent, are utilized in the washing step in the pulping of virgin cellulosic fiber. The methods of the invention provide for the enhanced removal and recovery of cooking chemicals and organics from the pulp.
公开/授权文献
- USD432096S Semiconductor module 公开/授权日：2000-10-17
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