GB1202576A - Silver recovery process - Google Patents
Silver recovery processInfo
- Publication number
- GB1202576A GB1202576A GB4162567A GB4162567A GB1202576A GB 1202576 A GB1202576 A GB 1202576A GB 4162567 A GB4162567 A GB 4162567A GB 4162567 A GB4162567 A GB 4162567A GB 1202576 A GB1202576 A GB 1202576A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sludge
- solution
- recovered
- halide
- silver
- 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
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C11/00—Auxiliary processes in photography
- G03C11/24—Removing emulsion from waste photographic material; Recovery of photosensitive or other substances
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Activated Sludge Processes (AREA)
Abstract
1,202,576. Silver recovery process. SUMITOMO KIKAI KOGYO K.K., and FUJI SHASHIN FILM K.K. 12 Sept., 1967, No. 41625/67. Heading C1A. Silver halide is recovered from a solution which also contains organic matter, e.g. a washing solution produced in the manufacture of photographic materials, by subjecting the solution to treatment with an active sludge (defined as river sludge containing soil bacteria which have been cultured for a time using N- and P-containing nutrients) to oxidize the organic matter, and absorbing the silver halide on the active sludge, whence it is recovered after precipitation of the halide plus sludge. The initial solution, which may contain silver bromide, chloride, chlorobromide or iodobromide, is poured into a chamber containing active sludge, and air is passed for 3 to 5 hours, both to stir the mixture and to provide an oxygen content of more than 2 p.p.m. 70-80% of the halide is adsorbed on the sludge and the remainder of the Ag is recovered from the gelatine-free solution by means of a coagulant such as Al 2 (SO 4 ) 3 . A flow process is described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4162567A GB1202576A (en) | 1967-09-12 | 1967-09-12 | Silver recovery process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4162567A GB1202576A (en) | 1967-09-12 | 1967-09-12 | Silver recovery process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1202576A true GB1202576A (en) | 1970-08-19 |
Family
ID=10420561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4162567A Expired GB1202576A (en) | 1967-09-12 | 1967-09-12 | Silver recovery process |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1202576A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2157669A (en) * | 1984-04-17 | 1985-10-30 | Linde Ag | Exploiting metal deposits of low concentrations |
-
1967
- 1967-09-12 GB GB4162567A patent/GB1202576A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2157669A (en) * | 1984-04-17 | 1985-10-30 | Linde Ag | Exploiting metal deposits of low concentrations |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |