发明授权
- 专利标题: Method of recovering metals from industrial by-products
- 专利标题(中): 从工业副产品中回收金属的方法
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申请号: US587387申请日: 1984-03-08
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公开(公告)号: US4572822A公开(公告)日: 1986-02-25
- 发明人: Hideki Abe , Hiroshi Tanaka
- 申请人: Hideki Abe , Hiroshi Tanaka
- 申请人地址: JPX Tokyo
- 专利权人: Dowa Mining Co., Ltd.
- 当前专利权人: Dowa Mining Co., Ltd.
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX57-22482 19820215
- 主分类号: C22B11/00
- IPC分类号: C22B11/00 ; C01G3/12 ; C01G9/08 ; C01G11/02 ; C01G28/00 ; C01G49/06 ; C01G49/08 ; C22B7/00 ; C22B7/02 ; C22B13/00 ; C22B15/00
摘要:
There is disclosed a novel method of recovering valuable metals from an industrial by-product containing copper and arsenic and at least one metal selected from among lead, zinc, iron, silver and cadmium, said method comprising leaching the by-product with sulfuric acid in an SO.sub.2 gas atmosphere at a temperature of 70.degree. C. or higher in the presence of a solid sulfide to thereby precipitate copper selectively as copper sulfide while dissolving other metal or metals in the leach solution and then separating the copper containing precipitate from the leach solution, said leach solution containing substantially no copper.
公开/授权文献
- US3963830A Thermolysis of water in contact with zeolite masses 公开/授权日:1976-06-15