发明名称 |
Method of bleaching with formamidine sulfinic acid using a reducing agent to eliminate residual peroxide |
摘要 |
A process for final bleaching cellulose-containing pulp which has been subjected to previous bleaching with a peroxide compound. The process involves the sequential steps of exposing the pulp to an amount of a reducing agent in order to eliminate residual peroxide compound from the pulp and then final bleaching the pulp by exposing the pulp to an amount of formamidine sulfinic acid.
|
申请公布号 |
US6428653(B1) |
申请公布日期 |
2002.08.06 |
申请号 |
US20000728979 |
申请日期 |
2000.12.04 |
申请人 |
WEST FRASER TIMBER CO. LTD. |
发明人 |
DENTON RICHARD C.;AKERLUND GORGEN |
分类号 |
D21C9/10;D21C9/16;(IPC1-7):D21C9/16 |
主分类号 |
D21C9/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|