Process for the recovery of silver values from...

Details Process for the recovery of silver values from... Process for the recovery of silver values from...

C - Chemistry, Metallurgy

22

B

53/225

C22B 11/04 (1980.01)

Patent

CA 1150931

A B S T R A C T A process for the recovery of silver values from silver-containing material which also contains iron and arsenic includes leaching the material under oxidizing conditions at elevated temperature and pressure in aqueous nitric acid solution to dissolve a substantial amount of silver together with sub- stantial amounts of arsenic, iron and other metals if present. The resultant leach solution is separated from undissolved leach residue and treated with a solution containing chloride ions to selectively precipitate substantially all dissolved silver as silver chloride without significant co-precipitation of other dissolved metals. The silver chloride precipitate is then separated from the remaining solution.

353083

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