Method for recovering silver from waste photographic film and paper
Patent
·
OSTI ID:6828047
In a process for recovering silver from the emulsion of photographic materials, of the type wherein silver in the emulsion is oxidized and thereafter dissolved to form a solution from which the silver is recovered by a reduction process, the improvement is described wherein the step of oxidizing the silver comprises: treating the photographic materials with an acid solution of from about 10% to about 26% ferric chloride at a pH of up to about 2.
- Assignee:
- Argentum International Inc., Pomona, NY
- Patent Number(s):
- US 4759914
- OSTI ID:
- 6828047
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
400201 -- Chemical & Physicochemical Properties
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
DISPERSIONS
ELEMENTS
EMULSIONS
EXTRACTION
HALIDES
HALOGEN COMPOUNDS
INDUSTRIAL PLANTS
INDUSTRY
IRON CHLORIDES
IRON COMPOUNDS
MANAGEMENT
MATERIALS RECOVERY
METALS
OXIDATION
PAPER INDUSTRY
PH VALUE
PHOTOGRAPHIC EMULSIONS
PROCESSING
RECOVERY
REDUCTIVE EXTRACTION
SEPARATION PROCESSES
SILVER
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE PROCESSING PLANTS
WOOD PRODUCTS INDUSTRY
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
400201 -- Chemical & Physicochemical Properties
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
DISPERSIONS
ELEMENTS
EMULSIONS
EXTRACTION
HALIDES
HALOGEN COMPOUNDS
INDUSTRIAL PLANTS
INDUSTRY
IRON CHLORIDES
IRON COMPOUNDS
MANAGEMENT
MATERIALS RECOVERY
METALS
OXIDATION
PAPER INDUSTRY
PH VALUE
PHOTOGRAPHIC EMULSIONS
PROCESSING
RECOVERY
REDUCTIVE EXTRACTION
SEPARATION PROCESSES
SILVER
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE PROCESSING PLANTS
WOOD PRODUCTS INDUSTRY