发明名称 |
Ozone bleaching process utilizing a fluidizing mixer and super-atmospheric pressure |
摘要 |
Method and apparatus for ozone bleaching a medium consistency cellulosic fiber suspension include feeding the fiber suspension and an ozone in carrier gas stream under pressure into a fluidizing mixer; intimately and uniformly mixing the fiber suspension with the ozone to achieve a bleaching reaction; passing the mixture into a first reaction vessel to permit the bleaching reaction to proceed and to consume a major part of the ozone; adding a second bleaching chemical to the mixture; separating the excess ozone and carrier gas from the mixture in a second considerably larger vessel and removing the fiber suspension from the second vessel after the effective second bleaching reaction.
|
申请公布号 |
US5607545(A) |
申请公布日期 |
1997.03.04 |
申请号 |
US19920935334 |
申请日期 |
1992.08.27 |
申请人 |
A. AHLSTROM CORPORATION |
发明人 |
HENRICSON, KAJ;GREENWOOD, BRIAN |
分类号 |
D21C9/10;D21C9/153;(IPC1-7):D21C9/14;D21C9/16 |
主分类号 |
D21C9/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|