| 摘要 |
TITLE PD-2360 PROCESS FOR RECOVERY OF SILVER FROM SPENT, WASTE, ACIDIC PROCESSING FLUIDS 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 |
