发明名称 |
Method for extracting osmium and ruthenium from noble metal concentrates |
摘要 |
A method for extracting osmium and ruthenium from noble metal concentrates, by:a) treatment of a noble metal concentrate containing osmium and ruthenium with nitric acid at a maximum temperature of about T=+30° C.,b) heating of the resultant suspension/solution to a minimum temperature of about T=+85° C.;c) capturing the resultant osmium tetroxide in an absorption solution;d) treatment of the suspension/solution having a temperature of about T=+20° C. to 30° C. with hydroxide at a maximum reaction temperature of about T=+65° C.; ande) treatment of the alkaline suspension/solution from step d) with a substance for the oxidizing leaching of the ruthenium.
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申请公布号 |
US6475449(B2) |
申请公布日期 |
2002.11.05 |
申请号 |
US20010754515 |
申请日期 |
2001.01.04 |
申请人 |
W.C. HERAEUS GMBH & CO. KG |
发明人 |
GREHL MATTHIAS;MEYER HORST;SCHAEFER DIETER |
分类号 |
C01G55/00;C22B3/06;C22B3/44;C22B11/00;C22B61/00;(IPC1-7):C22B11/00 |
主分类号 |
C01G55/00 |
代理机构 |
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地址 |
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