Silver recovery process

Details Silver recovery process Silver recovery process

1991-06-28

1993-02-23

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Free metal or alloy reductant contains magnesium

210638, 210757, C22B 346

Patent

active

051886626

ABSTRACT:
A process for treating a photographic developer solution containing silver ion comprises contacting the solution with a silver recovery element (10), which comprises a substrate (12) having thereon a hydrophilic colloid layer (16) containing physical development nickel. The contacting is carried out for a time sufficient to reduce the silver concentration in the developer solution to a desired level. The process is useful for treating a seasoned or unseasoned photographic developer solution containing silver ions.

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patent: 4280925 (1981-07-01), Kiefer
patent: 4325732 (1982-04-01), Woog
patent: 4882056 (1989-11-01), Degen et al.
patent: 4988448 (1991-01-01), Woog

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