发明名称 |
Förfarande för behandling av processvatten |
摘要 |
A method treats process water containing metal ions, in connection with bleaching of lignocellulosic pulp. The method is characterized by the steps of a) adjusting the Mg2+ content of the process water to form a flocculating base for metals and an organic substance; b) supplying a carbonate source to the process water to precipiate calcium as calcium carbonate; c) increasing the pH of the process water by adding white liquor to precipipate metals such as metal hydroxides; d) adding a flocculating agent to the process water; and e) separating the precipitated, flocculated metal compounds from the process water by flotation. |
申请公布号 |
SE9803384(D0) |
申请公布日期 |
1998.10.02 |
申请号 |
SE19980003384 |
申请日期 |
1998.10.02 |
申请人 |
KEMIRA KEMI AB |
发明人 |
CHRISTOS *RAMPOTAS;VIVEKA *SVENSSON;JONNY *HANSSON;MARGARETA *NILSSON |
分类号 |
D21C9/10;C02F1/24;C02F1/52;C02F1/54;C02F9/04;C02F101/20;C02F103/28;D21C11/00;(IPC1-7):D21C/ |
主分类号 |
D21C9/10 |
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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