发明名称 |
REMOVAL OF SILVER |
摘要 |
<p>Effluent streams from photographic processes contain both silver and thiosulphate ions, and because of the formation of complex anions it is difficult to remove the silver. The silver may be removed using a cell (12) with a cathode (24) exposed to the effluent liquid, and an anode (25) separated from the liquid by a barrier (22) permeable at least to anions. Some silver sulphide is formed electrochemically at the cathode (24); at the anode (25) water is electrolysed and becomes acidic, so the complex anions migrating through the barrier (22) generate silver sulphide chemically. The resulting silver sulphide precipitate is separated from the liquid by a filter (14). <IMAGE></p> |
申请公布号 |
JPH07310195(A) |
申请公布日期 |
1995.11.28 |
申请号 |
JP19950109521 |
申请日期 |
1995.05.08 |
申请人 |
UK ATOMIC ENERGY AUTHORITY |
发明人 |
MAIKERU RAFUAERU HIYUU HIRU;MAAKU DEIBUITSUDO NEBUIRU;ANDORIYUU DEREKU TAANAA |
分类号 |
G03C5/00;B01D61/48;B01J47/08;C02F1/42;C02F1/46;C02F1/461;C02F1/469;C02F1/62;C22B3/20;C22B11/00;C25C1/20;(IPC1-7):C25C1/20 |
主分类号 |
G03C5/00 |
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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