发明名称 |
TREATMENT OF NICKEL-CONTAINING WASTE WATER ON PHOSPHATING |
摘要 |
Method for the treatment of a nickel-containing waste water, comprising a phosphate bath overflow and/or the rinsing water after phosphating, whereby the phosphating is carried out with an acidic aqueous phosphate solution, containing 3 to 50 g/l phosphate ions, calculated as PO4<-3>, 0.2 to 3 g/l zinc ions, 0.01 to 2.5 g/l nickel ions, optionally further metal ions and optionally accelerator. The phosphate bath overflow and/or post-phosphating rinsing water are run over a weakly acidic ion-exchanger, characterised in that the acid groups of the ion exchanger are neutralised with alkali metal ions to no more than 15 % and that on supplying the nickel-containing aqueous solution to the ion exchanger said solution has a pH value in the range 2.5 to 6.0. |
申请公布号 |
WO0240405(A2) |
申请公布日期 |
2002.05.23 |
申请号 |
WO2001EP12814 |
申请日期 |
2001.11.06 |
申请人 |
HENKEL KOMMANDITGESELLSCHAFT AUF AKTIEN;LEPA, KLAUS;KROEMER, JENS;DRONIOU, PATRICK;BROUWER, JAN-WILLEM;KUHM, PETER |
发明人 |
LEPA, KLAUS;KROEMER, JENS;DRONIOU, PATRICK;BROUWER, JAN-WILLEM;KUHM, PETER |
分类号 |
B01D61/02;B01D61/14;B01J39/04;B01J45/00;B01J49/00;C02F1/42;C23C22/22;C23C22/86 |
主分类号 |
B01D61/02 |
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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