发明名称 |
Oxygen delignification of pulp in two stages |
摘要 |
Methods for oxygen delignification of chemical pulps are disclosed including contacting the chemical pulp with oxygen first in an upstream reactor vessel and then in a downstream reactor vessel. The upstream reactor vessel is maintained at pressures of greater than about 3 bar, and the downstream reactor vessel is maintained at temperatures of between about 90 and 120° C. and corresponding predetermined pressures. Heating of the partially delignified chemical pulp between the upstream and downstream reactors is accomplished by contacting the partially delignified chemical pulp with low pressure steam. |
申请公布号 |
AU2312797(A) |
申请公布日期 |
1997.10.17 |
申请号 |
AU19970023127 |
申请日期 |
1997.03.07 |
申请人 |
SUNDS DEFIBRATOR INDUSTRIES AB |
发明人 |
MONICA BOKSTROM;KJELL FORSLUND;RUNE LARSSON;MATTS SUNDIN |
分类号 |
D21C9/10;D21C9/147 |
主分类号 |
D21C9/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|