| 发明名称 |
PROCESS FOR REMOVING HEAVY METALS FROM SOILS |
| 摘要 |
<p>Heavy metals are 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. Heavy metals are also efficiently removed from paint chips by washing with an aqueous acid. The heavy metals are recovered from the leachant be cementation.</p> |
| 申请公布号 |
EP0619764(B1) |
申请公布日期 |
1997.10.29 |
| 申请号 |
EP19920919788 |
申请日期 |
1992.09.15 |
| 申请人 |
COGNIS, INCORPORATED |
发明人 |
FRISTAD, WILLIAM, E.;VIRNIG, MICHAEL, J.;CASSEL, JONATHAN, M.;ELLIOTT, DANA, K. |
| 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;(IPC1-7):B09B3/00;C22B3/00 |
主分类号 |
B03B5/00 |
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