| 发明名称 |
Bleaching recycled pulp with a reductive-oxidative sequence |
| 摘要 |
The invention relates to a method of bleaching waste paper pulp. The pulp is first treated to a reductive chemical followed by acidification and washing or dewatering. The pulp is then subjected to ozone and then to hydrogen peroxide. The reductive chemical used is either formamidine sulphinic acid or sodium hydrosulfite.
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| 申请公布号 |
US5464501(A) |
申请公布日期 |
1995.11.07 |
| 申请号 |
US19930173674 |
申请日期 |
1993.12.23 |
| 申请人 |
SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION L'AIR LIQUIDE, DES PROCEDES GEORGES CLAUDE |
发明人 |
KOGAN, JACK;MUGUET, MICHEL |
| 分类号 |
D21C5/02;D21C9/10;D21C9/153;D21C9/16;(IPC1-7):D21C5/02 |
主分类号 |
D21C5/02 |
| 代理机构 |
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