Process for recovery of silver from spent, waste, acidic...

Details Process for recovery of silver from spent, waste, acidic... Process for recovery of silver from spent, waste, acidic...

G - Physics

03

C

53/221, 23/411

G03C 11/24 (2006.01) C02F 1/62 (2006.01) C22B 7/00 (2006.01) C22B 11/00 (2006.01) C22B 11/12 (2006.01) G03C 5/00 (2006.01)

Patent

CA 1303859

TITLE PD-2360 PROCESS FOR RECOVERY OF SILVER FROM SPENT, WASTE, ACIDIC PROCESSING FLUIDS ABSTRACT OF THE INVENTION Process for recovery of silver from spent, waste acidic silver halide photographic processing fluid, e.g., fixer solution, comprising passing the fluid through finely divided iron, e.g., steel wool, contained in a vessel in the presence of a metal salt of copper or cadmium, e.g., copper(II)sulfate, copper chloride dihydrate. cadmium sulfate, etc. The ratio of iron to metal salt is 25 to 1 to 4 to 1. An apparatus for recovery of silver is also described. 4510k

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