Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

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