发明名称 |
PROCESS FOR THE TREATMENT OF RINSE WATER OF METAL PIECES HAVING UNDERGONE A PICKLING BY A STRONG ACID |
摘要 |
1. Treatment process for water that has been used for rinsing ferrous metal parts which have undergone pickling with strong acid, comprising the following stages : a) the said rinsing water is put in contact with a cationic resin ; b) the charged resin is eluted with a minimum 4N solution of the strong acid used for pickling ; characterised by the fact that the said concentrated acid, used in stage (b) is a used pickling solution and contains 40 to 150 grams of iron per litre, the ratio between the metallic ion concentration and the strong acid concentration, expressed in gram-equivalents, being one-third at the most. |
申请公布号 |
EP0019678(B1) |
申请公布日期 |
1984.07.04 |
申请号 |
EP19790400765 |
申请日期 |
1979.10.19 |
申请人 |
MINEMET RECHERCHE;PROSERPOL |
发明人 |
BOZEC, CHRISTIAN;LAURENT, JEAN-PAUL |
分类号 |
B01J39/04;B01J49/00;C23G1/36;C25D21/22 |
主分类号 |
B01J39/04 |
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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