Silver recovery from spent photographic solutions

Details Silver recovery from spent photographic solutions Silver recovery from spent photographic solutions

C - Chemistry, Metallurgy

22

B

53/221

C22B 3/44 (2006.01) G03C 5/395 (2006.01)

Patent

CA 2000527

19 ABSTRACT OF THE DISCLOSURE A process is disclosed for recovering silver sulfide from a silver containing spent photographic fixer solution The process is particularly suited for treating the fixer solution in a manner which enables recycling of the solution and hence considerable reduction in cost in the fixer solution and reducing pollution to the environment. The process comprises introducing hydrosulfide into the silver containing spent fixer solution to precipitate silver sulfide. The precipitate is isolated from the fixer solution to remove thereby silver and hence enable recycle of the fixer solution.

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