发明名称 |
FOERFARANDE OCH REAKTOR FOER DELIGNIFIERING AV CELLULOSA MED SYRE. |
摘要 |
Method and apparatus for delignifying chemical pulp by means of oxygen, in which an aqueous slurry of chemical pulp is formed, then mixed with a caustic agent, followed by contact with a delignifying fluid. Water is drained off the slurry without reduction of pressure and while maintaining temperature following which the resulting slurry is maintained under these temperature and pressure conditions for a discrete period of time. The thus-obtained treated slurry is then washed. |
申请公布号 |
FI80484(B) |
申请公布日期 |
1990.02.28 |
申请号 |
FI19850002324 |
申请日期 |
1985.06.11 |
申请人 |
WAAGNER-BIRO AKTIENGESELLSCHAFT;STEYRERMUEHL PAPIERFABRIKS- UND VERLAGSGESELLSCHAFT |
发明人 |
LOQUENZ, HEINZ;MEINDL, NORBERT;MEISSL, SIEGFRIED;SCHWARZL, KARL;SCHWEIGER, HELMUT;HRUSCHKA, ANTON |
分类号 |
D21C9/147;(IPC1-7):D21C9/147;D21C9/153 |
主分类号 |
D21C9/147 |
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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