FR2328222A1 - Silver recovery from used or waste photographic material - by bleaching and absorption in fixing soln., avoids incineration - Google Patents
Silver recovery from used or waste photographic material - by bleaching and absorption in fixing soln., avoids incinerationInfo
- Publication number
- FR2328222A1 FR2328222A1 FR7631046A FR7631046A FR2328222A1 FR 2328222 A1 FR2328222 A1 FR 2328222A1 FR 7631046 A FR7631046 A FR 7631046A FR 7631046 A FR7631046 A FR 7631046A FR 2328222 A1 FR2328222 A1 FR 2328222A1
- Authority
- FR
- France
- Prior art keywords
- bleaching
- fixing
- bin
- incineration
- avoids
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/046—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electrolytic Production Of Metals (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Photographic Developing Apparatuses (AREA)
Abstract
Ag. recovery involves bleaching to convert the Ag into soluble Ag salts, which still adhere to the material, and then absorbing these salts from the material with a commercial fixing soln. The material pref. is cut or torn into small pieces first and washed after both the bleaching and fixing stages while the fixing soln. is passed through a machine in which the Ag is recovered electrolytically. The use of special incinerators is avoided and it is also possible to recover the plastics of the film base. The costs can be reduced by the use of relatively crude chemicals. The 4 stages are carried out at 4 different stations on a track on which the supply bin(s) run. The solns. are pumped into the bin and circulated, whilst the washing water is sprayed into the top of the bin. The solns. and water are drained off, assisted by an air blast.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4277475 | 1975-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2328222A1 true FR2328222A1 (en) | 1977-05-13 |
Family
ID=10425919
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7631046A Withdrawn FR2328222A1 (en) | 1975-10-17 | 1976-10-15 | Silver recovery from used or waste photographic material - by bleaching and absorption in fixing soln., avoids incineration |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5282234A (en) |
AU (1) | AU1867476A (en) |
DE (1) | DE2646378A1 (en) |
FR (1) | FR2328222A1 (en) |
IT (1) | IT1070916B (en) |
SE (1) | SE7611471L (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2478337A1 (en) * | 1980-03-14 | 1981-09-18 | Photographic Silver Recovery | Recovery of silver from photographic films - by treating chopped film in large scale plant with fixing soln. to dissolve the silver, which is reclaimed by electrolysis |
EP0366334A1 (en) * | 1988-10-24 | 1990-05-02 | E.I. Du Pont De Nemours & Company Incorporated | Improvements in or relating to the recovery of silver |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4299676A (en) * | 1980-01-31 | 1981-11-10 | Photographic Silver Recovery Limited | Recovery of silver from photographic film |
JPS59145738A (en) * | 1983-02-10 | 1984-08-21 | Konishiroku Photo Ind Co Ltd | Recovering method of scrap film |
JP6789757B2 (en) * | 2016-10-25 | 2020-11-25 | 大口電子株式会社 | Precious metal recovery method and recovery device |
-
1976
- 1976-10-14 DE DE19762646378 patent/DE2646378A1/en active Pending
- 1976-10-14 AU AU18674/76A patent/AU1867476A/en not_active Expired
- 1976-10-15 FR FR7631046A patent/FR2328222A1/en not_active Withdrawn
- 1976-10-15 SE SE7611471A patent/SE7611471L/en unknown
- 1976-10-15 IT IT2838576A patent/IT1070916B/en active
- 1976-10-18 JP JP12541176A patent/JPS5282234A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2478337A1 (en) * | 1980-03-14 | 1981-09-18 | Photographic Silver Recovery | Recovery of silver from photographic films - by treating chopped film in large scale plant with fixing soln. to dissolve the silver, which is reclaimed by electrolysis |
EP0366334A1 (en) * | 1988-10-24 | 1990-05-02 | E.I. Du Pont De Nemours & Company Incorporated | Improvements in or relating to the recovery of silver |
Also Published As
Publication number | Publication date |
---|---|
JPS5282234A (en) | 1977-07-09 |
SE7611471L (en) | 1977-04-18 |
IT1070916B (en) | 1985-04-02 |
DE2646378A1 (en) | 1977-04-21 |
AU1867476A (en) | 1978-04-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |