发明名称 |
PROCESS FOR THE RECOVERY OF PRECIOUS METAL VALUES FROM AQUEOUS AMMONIACAL THIOSULFATE LEACH SOLUTIONS |
摘要 |
<p>The process of recovering precious metal from ores containing precious metals, such as gold and silver, from an aqueous ammoniacal thiosulfate leach solution to provide a significant practical and economical process for the recovery of gold or silver. After leaching of the ore with an aqueous ammoniacal thiosulfate solution, the leach solution is contacted with a precious metal extraction reagent to extract the precious metal values from the leach solution, after which the precious metal values are stripped from the extraction reagent to form a concentrated solution of the precious metal values from which the precious metals may be recovered by conventional methods such as electrolysis. The extraction reagents are those having guanidyl functionality or a quaternary amine functionality mixed with a weak organic acid such as a phenol. In the process, novel thiosulfate complexes of the precious metals are formed with the guanidyl or the quaternary amine extractants.</p> |
申请公布号 |
WO9749474(A1) |
申请公布日期 |
1997.12.31 |
申请号 |
WO1997US08654 |
申请日期 |
1997.05.28 |
申请人 |
HENKEL CORPORATION |
发明人 |
VIRNIG, MICHAEL, J.;SIEROKOSKI, J., MICHAEL |
分类号 |
C01G5/00;C01G7/00;C07C279/16;C07G99/00;C22B3/28;C22B11/08;(IPC1-7):B01D11/04;C22B3/16;C07F1/12;C07G17/00;C07C277/00;C22B3/30;C22B11/00;C01B17/64 |
主分类号 |
C01G5/00 |
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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