GB587608A - Improvements in and relating to the electro-deposition of silver - Google Patents
Improvements in and relating to the electro-deposition of silverInfo
- Publication number
- GB587608A GB587608A GB23571/44A GB2357144A GB587608A GB 587608 A GB587608 A GB 587608A GB 23571/44 A GB23571/44 A GB 23571/44A GB 2357144 A GB2357144 A GB 2357144A GB 587608 A GB587608 A GB 587608A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silver
- oxygen
- electrolyte
- potassium
- per cent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/46—Electroplating: Baths therefor from solutions of silver
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D21/00—Processes for servicing or operating cells for electrolytic coating
- C25D21/16—Regeneration of process solutions
- C25D21/18—Regeneration of process solutions of electrolytes
Abstract
Spent electrolyte from a silver plating bath containing free cyanide is regenerated by introduction of metallic silver in the presence of oxygen or a gas containing oxygen. The bath may consist of silver cyanide, potassium or sodium cyanide, potassium or sodium carbonate and potassium or sodium hydroxide to bring the pH value between 13.2 and 14. In the apparatus shown electrolyte is withdrawn from the plating tank 12 (see Group XXXVI) and driven by a pump 24 to a spray head 25 at the top of a tower 11 open to the air and having a perforated base supporting silver shot 26, the electrolyte returning to the tank 12 by overflow chamber 28 and pipe 29. In a modification the tower 11 is closed at the top and supplied with oxygen from a cylinder. In a further modification two <PICT:0587608/III/1> or more towers each closed and supplied with oxygen are provided; these communicate at the base with common overflow chamber containing a float actuating the switch of a pump for returning the electrolyte to the plating tank.ALSO:An alloy for use as an anode in electrolysis contains 14.5 per cent. silicon, 0.8 per cent. carbon, 0.35 per cent. manganese and balance iron.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US587608XA | 1943-11-27 | 1943-11-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB587608A true GB587608A (en) | 1947-04-30 |
Family
ID=22018768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23571/44A Expired GB587608A (en) | 1943-11-27 | 1944-11-27 | Improvements in and relating to the electro-deposition of silver |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB587608A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1040873B (en) * | 1955-07-15 | 1958-10-09 | Vacuumschmelze Ag | Manufacture of multiple metals |
-
1944
- 1944-11-27 GB GB23571/44A patent/GB587608A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1040873B (en) * | 1955-07-15 | 1958-10-09 | Vacuumschmelze Ag | Manufacture of multiple metals |
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