发明名称 |
PROCESS FOR PRODUCING METALLIC LEAD STARTING FROM DESULFURIZED PASTEL |
摘要 |
The present invention relates to an electrolytic process for producing metallic lead starting from desulfurized lead pastel comprising the following operative phases: a) leaching the desulfurized pastel by putting it in contact with a solution comprising ammonium chloride, with the formation of a leach liquor and evolution of gaseous CO2; b) separating a first solid residue and a first clarified leach liquor from the leach liquor coming from phase a); c) leaching the solid residue separated in phase b) by putting it in contact with a solution comprising ammonium chloride and hydrogen peroxide; d) separating a second solid residue and a second clarified leach liquor from the leach liquor coming from phase c); e) joining the first clarified leach liquor coming from phase b) with the second clarified leach liquor coming from phase d) and forming a single solution; f) subjecting the solution leaving phase e) to electrolysis in a flow cell, with a current density ranging from 50 to 10,000 A/m2, said electrolysis resulting in the formation of a lead sponge. The present invention also relates to the relative desulfurization process of the pastel. |
申请公布号 |
WO2009068988(A3) |
申请公布日期 |
2009.11.12 |
申请号 |
WO2008IB03307 |
申请日期 |
2008.11.27 |
申请人 |
ENGITEC TECHNOLOGIES S.P.A.;OLPER, MARCO;MACCAGNI, MASSIMO;COSSALI, SILVANO |
发明人 |
OLPER, MARCO;MACCAGNI, MASSIMO;COSSALI, SILVANO |
分类号 |
C22B7/00;C22B13/00;C25C1/18 |
主分类号 |
C22B7/00 |
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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