| 发明名称 |
ZELLSTOFFBEHANDLUNG MIT EINEM KOMPLEXBILDNER IN MINDESTENS ZWEI MISCHUNGSTUFEN OHNE ZWISCHENWÄSCHE |
| 摘要 |
A method of chlorine-free bleaching of pulp where metals are removed by means of a chelating agent. The chelating agent is admixed to the pulp in at least two subsequent mixing steps without intermediate washing. The stay-time between the mixing steps shall be less than 15 minutes, and the pulp is washed after the last mixing step. |
| 申请公布号 |
DE69611680(T2) |
申请公布日期 |
2001.05.10 |
| 申请号 |
DE1996611680T |
申请日期 |
1996.08.09 |
| 申请人 |
VALMET FIBERTECH AB, SUNDSVALL |
发明人 |
GERMGARD, ULF;LINDQUIST, JONAS |
| 分类号 |
D21C9/10;(IPC1-7):D21C9/10;D21C9/16 |
主分类号 |
D21C9/10 |
| 代理机构 |
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代理人 |
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| 主权项 |
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