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Process for recovering silver from photographic solutions
- https://www.freepatentsonline.com/6277290.html#:~:text=%20%20%205900041%20%20%20Value%20metal,%20%20Woog%20%207%20more%20rows%20
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How to Recover Silver from Waste Photographic Solutions
- https://www.911metallurgist.com/silver-recovery-waste-photographic/
- Although several variables may affect the potential quantity of silver recoverable from waste photographic solutions, a gallon of fixing bath from X-ray processors will contain about 1.2 troy ounces of silver; most other film fixing baths will contain from 0.4 to 0.6 troy ounce, and pape…
Recovering Silver from Photographic Materials
- https://www.911metallurgist.com/blog/recovering-silver-from-photographic-materials
- Photographic silver recovery procedure Fill a five-gallon plastic bucket with bleach. Dip the film into the bleach and move it around. When the film is transparent, all the silver has been removed. When the bleach has taken all the silver it can hold, it will no longer make the film transparent. Time for a new batch of bleach.
Method for the recovery of silver from waste …
- https://www.osti.gov/doepatents/biblio/5364206
- Abstract. The method of the present invention is directed to the recovery of silver from spent photographic fixer solutions and for providing an effluent essentially silver-free that is suitable for discharge into commercial sewage systems. The present method involves the steps of introducing the spent photographic fixer solution into an alkaline hypochlorite solution.
US5288728A - Process for recovering silver from …
- https://patents.google.com/patent/US5288728A/en
- Silver is recovered from a mixture of seasoned photoprocessing solutions by contacting the solutions with a mercapto-s-triazine or water-soluble salt thereof, the mercapto-s-triazine having the formula ##STR1## wherein: R is hydrogen, --NH 4 , --OH, alkyl having 1 to 8 carbon atoms, alkoxy having 1 to 8 carbon atoms, phenyl, cyclohexyl, oxazinyl, phenoxy, --NR' 2 or SR"; wherein …
US5238543A - Recovery of silver from photographic film …
- https://patents.google.com/patent/US5238543A/en
- A process which incorporates the recovery of silver from photographic film into the recovery of silver from photographic development waste solution is …
Removal of Silver from Photographic Solutions
- https://www.sciencedirect.com/science/article/pii/S0166111608712585
- SUMMARY 01: METHODS 0 ' RLCOVERY 1 Most large processors use electrolytic techniques to recover silver. Such systems will be affected by pH and fixer formulation. F o r example, for bleach-fix spent solutions the optimum pH is 7.2, while for non-bleach-fix solutions, the optimum pH is on the acid side (4.5 t o 6.9).
Silver recovery from silver-rich photographic processing …
- https://www.researchgate.net/publication/270667579_Silver_recovery_from_silver-rich_photographic_processing_solutions_by_copper
- photographic effluent. Electrolysis and metallic replacement are the most common technologies available to photographic processors for recovering …
Process for recovering silver from photographic solutions
- https://www.freepatentsonline.com/6277290.html
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Recovery of silver from used photographic solutions
- https://www.freepatentsonline.com/3901777.html
- a method for recovering silver from waste silver solutions, especially spent photographic processing liquids, said method utilizing: an electrically operated silver recovery machine of the type which includes an electrical supply for passing electric current between two electrodes, one of which is a self-draining cathode assembly, and through …
Method of recovering silver from photographic processing solutions …
- https://www.freepatentsonline.com/5244777.html
- A method of recovering silver from used photographic fixer solutions comprising the steps of: providing a used photographic fixer solution comprising silver and a silver halide solvent, wherein said solvent is solely an alkali metal sulphite; removing said silver from said fixer solution in solid form; and.
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