GB1500748A - Method and apparatus for electrolytic recovery of silver from photographic fixing baths - Google Patents
Method and apparatus for electrolytic recovery of silver from photographic fixing bathsInfo
- Publication number
- GB1500748A GB1500748A GB4354275A GB4354275A GB1500748A GB 1500748 A GB1500748 A GB 1500748A GB 4354275 A GB4354275 A GB 4354275A GB 4354275 A GB4354275 A GB 4354275A GB 1500748 A GB1500748 A GB 1500748A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silver
- voltage
- cell
- electrolytic
- recovery
- 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
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
- C25C7/06—Operating or servicing
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
1500748 Electrolytic recovery of silver GALAFIT SNC DI ARRIGONI & C 23 Oct 1975 [12 Dec 1974] 43542/75 Heading C7B Silver is electrolytically recovered from a photographic fixing bath by simultaneously supplying voltage from a variable voltage generator to an electrolytic silver recovery cell 6 and an auxiliary electrolytic test cell 14, both cells containing the liquid of the bath, increasing the voltage to a value at which silver deposited on the cathode 18 of the test cell is sulphurized, terminating the voltage supply to the test cell, and continuing electrolytic recovery of silver in the cell 6 with the voltage initially at the value. The test cell may be a glass vessel 14, in which are immersed steel electrodes 16, 18, disposed on one side of a cabinet (10), Fig. 1 (not shown), on the front face of which are arranged a 3-section and 3-position switch 30, scale (24) and control knob (26) for regulating the setting of a device 3 of a voltage changer 15 connected to electrical supply leads 34 mounted inside the cabinet with a transformer 4, rectifier diode 7 and geared motor 13 for automatically operating the changer 15 via a drive shaft; a button 28 may be provided for (un)coupling the motor shaft to the regulating device 3. The recovery cell 6 may comprise two parallel steel plate cathodes 56, 58 between which is disposed at least one parallel graphite plate anode 60, and a stirring belt (52), Fig. 3 (not shown) with projections (54), moving around rollers (48, 50) driven by electric motor 40 between the cathode and the or each anode.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT4290674A IT1024081B (en) | 1974-12-12 | 1974-12-12 | ELECTROLYTIC PROCEDURE FOR THE RECOVERY OF SILVER IN PHOTOGRAPHIC FIXING TANKS AND MEANS FOR PERFORMING THIS PROCEDURE |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1500748A true GB1500748A (en) | 1978-02-08 |
Family
ID=11254567
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4354275A Expired GB1500748A (en) | 1974-12-12 | 1975-10-23 | Method and apparatus for electrolytic recovery of silver from photographic fixing baths |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2550462B2 (en) |
FR (1) | FR2275570A1 (en) |
GB (1) | GB1500748A (en) |
IT (1) | IT1024081B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5362369A (en) * | 1990-03-03 | 1994-11-08 | Heraeus Elektrochemie Gmbh | Fully automatic current control for metal depletion cells |
US6187167B1 (en) | 1998-07-13 | 2001-02-13 | Eastman Kodak Company | Recovery of metal from solution |
US6207037B1 (en) | 1998-07-13 | 2001-03-27 | Eastman Kodak Company | Recovery of metal from solution |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH626409A5 (en) * | 1977-02-28 | 1981-11-13 | Ciba Geigy Ag | |
JPS56501885A (en) * | 1980-01-17 | 1981-12-24 | ||
US4362608A (en) * | 1980-03-31 | 1982-12-07 | Silver Systems, Ltd. | Silver recovery method |
EP0757120A1 (en) * | 1995-08-04 | 1997-02-05 | Agfa-Gevaert N.V. | Apparatus and method for de-silvering a silver-containing solution |
-
1974
- 1974-12-12 IT IT4290674A patent/IT1024081B/en active
-
1975
- 1975-10-21 FR FR7532109A patent/FR2275570A1/en active Granted
- 1975-10-23 GB GB4354275A patent/GB1500748A/en not_active Expired
- 1975-11-10 DE DE19752550462 patent/DE2550462B2/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5362369A (en) * | 1990-03-03 | 1994-11-08 | Heraeus Elektrochemie Gmbh | Fully automatic current control for metal depletion cells |
US6187167B1 (en) | 1998-07-13 | 2001-02-13 | Eastman Kodak Company | Recovery of metal from solution |
US6207037B1 (en) | 1998-07-13 | 2001-03-27 | Eastman Kodak Company | Recovery of metal from solution |
Also Published As
Publication number | Publication date |
---|---|
DE2550462B2 (en) | 1977-06-02 |
FR2275570B1 (en) | 1979-07-27 |
FR2275570A1 (en) | 1976-01-16 |
DE2550462A1 (en) | 1976-07-08 |
IT1024081B (en) | 1978-06-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |