发明名称 |
Electrolytic recovery of silver from photographic bleach-fix baths |
摘要 |
This invention relates to the recovering of metallic silver from photographical bleach-fix baths. An electric current is passed through a bleach-fix solution containing silver ions and ferric ions, which solution has been brought to a predetermined redox potential by the addition of a reducing agent. The cathode is of the type wherein reduced silver ions can deposit thereon as metallic silver. The redox potential of the electrolyte solution is continuously monitored and a reducing agent is added automatically when the redox potential rises above a predetermined level. When the redox potential drops below a predetermined level the addition of the reducing agent is automatically stopped.
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申请公布号 |
US4186067(A) |
申请公布日期 |
1980.01.29 |
申请号 |
US19780934302 |
申请日期 |
1978.08.17 |
申请人 |
CIBA-GEIGY AG |
发明人 |
BLAKE, COLIN C;PAYNE, IVAN C |
分类号 |
C25C1/20;C25C7/06;G03C5/395;(IPC1-7):C25C1/20;C25C7/00;C25C7/02 |
主分类号 |
C25C1/20 |
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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