Method of recovering silver using anion-exchange resin

Details Method of recovering silver using anion-exchange resin Method of recovering silver using anion-exchange resin

C - Chemistry, Metallurgy

22

B

C22B 3/42 (2006.01) C22B 11/00 (2006.01)

Patent

CA 2660226

The present invention provides a method of recovering silver safely and efficiently from a chloride or bromide bath containing various metals. Specifically, a method of recovering silver from a hydrochloric acid solution containing alkali and/or alkali earth metal chloride, silver, copper and iron ions, comprising the steps of: (1) bringing the solution into contact with a strong-base anion-exchange resin to adsorb silver, copper, and iron on the anion-exchange resin; (2) then washing the anion-exchange resin with water to remove the adsorbed copper and iron; and (3) then bringing the ion- exchange resin into contact with a hydrochloric acid solution to elute the adsorbed silver, is provided.

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