发明名称 |
Recovery of precious metals |
摘要 |
Recovery of precious metals such as gold and silver from aqueous cyanide solutions thereof, by contact with a reagent containing a guanidine functionality. The guanidine reagent extracts the precious metal from the aqueous solution which is subsequentily stripped from the guanidine reagent and recovered by conventional methods. Certain novel guanidine compounds suitable for extracting gold and silver are disclosed.
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申请公布号 |
US4992200(A) |
申请公布日期 |
1991.02.12 |
申请号 |
US19880262228 |
申请日期 |
1988.10.21 |
申请人 |
HENKEL CORPORATION |
发明人 |
LIN, WILSON L.;MATTISON, PHILLIP L.;VIRNIG, MICHAEL J. |
分类号 |
C01B31/16;C01G5/00;C01G7/00;C07C279/04;C22B11/08 |
主分类号 |
C01B31/16 |
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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