发明授权
- 专利标题： Process for removing heavy metals from paint chips
- 专利标题（中）： 从油漆屑中去除重金属的工艺
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申请号： US930638申请日： 1992-08-17
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公开(公告)号： US5494649A公开(公告)日： 1996-02-27
- 发明人: William E. Fristad , Michael J. Virnig , Jonathan M. Cassel , Dana K. Elliot
- 申请人： William E. Fristad , Michael J. Virnig , Jonathan M. Cassel , Dana K. Elliot
- 申请人地址： CA Santa Rosa
- 专利权人： Cognis, Inc.
- 当前专利权人： Cognis, Inc.
- 当前专利权人地址： CA Santa Rosa
- 主分类号： B03B5/00
- IPC分类号： B03B5/00 ; B09B3/00 ; B09C1/02 ; B09C1/10 ; C01G13/00 ; C01G21/00 ; C22B1/00 ; C22B3/04 ; C22B3/06 ; C22B3/16 ; C22B3/46 ; C22B7/00 ; C22B13/00 ; C22B15/00 ; C22B25/06 ; C22B43/00 ; C22B25/00
摘要：
Heavy metals are removed from paint chips by leaching with an aqueous acid. Heavy metals are also efficiently removed from contaminated soil by a process which comprises leaching or washing the soil with a mild leachant solution comprised of an aqueous solution of an acid and a salt. The heavy metals are recovered from the leachant by cementation.
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