发明名称 |
Elektrolyyttinen menetelmä erittäin puhtaan platinan erottamiseksi kon taminoituneesta platinasta |
摘要 |
The electrolytic process for obtaining platinum of high purity from a concentrated hydrochloric acid solution of contaminated platinum containing base and noble metal impurities includes electrolyzing the hydrochloric acid solution containing the contaminated platinum in an electrolysis cell subdivided by a cation exchanger membrane under potentiostatic or voltage-controlled conditions with a voltage of 2.5 V to 8 V applied across the anode and cathode under a current density of 0.3 to 12.5 A/dm2 so as to form a refined platinum-containing solution and a platinum alloy metal deposit. The concentrated hydrochloric acid solutions used in the process can have a contaminated platinum content of 50 to 700 g/l and total metal impurities of </=5000 ppm. In contrast to the known prior art processes, the process according to the invention operates with minimal requirements in terms of safety technology and equipment, causes a minimal environmental burden and is far less time-consuming and more economical.
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申请公布号 |
FI100607(B) |
申请公布日期 |
1998.01.15 |
申请号 |
FI19930005661 |
申请日期 |
1993.12.16 |
申请人 |
SCHOTT GLASWERKE, |
发明人 |
HERRMANN,SIGRID;LANDAU,UWE |
分类号 |
C01G55/00;C25B1/00;C25C1/00;C25C1/20;(IPC1-7):C25C1/20 |
主分类号 |
C01G55/00 |
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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