Hydrometallurgic process for recovering in the metal form...

Details Hydrometallurgic process for recovering in the metal form... Hydrometallurgic process for recovering in the metal form...

C - Chemistry, Metallurgy

25

C

53/340, 204/73

C25C 1/18 (2006.01) H01M 10/54 (2006.01)

Patent

CA 1310837

"HYDROMETALLURGIC PROCESS FOR RECOVERING IN THE METAL FORM THE LEAD CONTAINED IN THE PASTE OF THE EXHAUSTED BATTERIES" Abstract A completely hydrometallurgic process is disclosed for recovering in the pure metal form the lead contained in the paste of the old batteries, separated from the other components, and desulphurized according to the known processes. The paste is leached with an acid suitable to the electrowinning, the amount of hydrogen peroxide necessary to reduce all of the existing PbO2 being added. A high extraction yield is obtained, without foreign salts being added to the electrolyte, which is then submitted to an electrolysis step, to recover Pb as cathodes.

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