发明名称 |
VERFAHREN ZUM BLEICHEN VON ZELLSTOFFEN. |
摘要 |
Bleaching of pulps of mechanical origin in which the pulp is treated with a metal-complexing or sequestering agent and is then washed with an efficiency higher than 95 % before being subjected to the action of hydrogen peroxide at a temperature above 100 DEG C and not exceeding 250 DEG C at the pressure of steam at the said temperature for 1 to 30 minutes, not conjointly with a mechanical beating action. |
申请公布号 |
AT84581(T) |
申请公布日期 |
1993.01.15 |
申请号 |
AT19880420102T |
申请日期 |
1988.03.29 |
申请人 |
ELF ATOCHEM S.A. |
发明人 |
DEVIC, MICHEL;KERVENNAL, JACQUES;SCHIRMANN, JEAN-PIERRE |
分类号 |
D21C9/16;D21C9/10 |
主分类号 |
D21C9/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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