| 发明名称 |
FOERFARANDE FOER BLEKNING AV MASSA. |
| 摘要 |
The invention relates to a process for bleaching pulp within the density range 8-18% as a single-phase bleach with Na2S2O4 or as a two-phase bleach first with H2O2 and then with Na2S2O4. The bleaching reagents are added in connection with the deaeration or thereafter. The pH of the pulp is at least 7. |
| 申请公布号 |
FI850374(L) |
申请公布日期 |
1986.07.30 |
| 申请号 |
FI19850000374 |
申请日期 |
1985.01.29 |
| 申请人 |
A. AHLSTROEM OSAKEYHTIOE |
发明人 |
AHOKAS, PIRJO;HENRICSSON, KAJ |
| 分类号 |
D21C9/10 |
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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