Hydrometallurgical process for recovering in pure metal form all

Details Hydrometallurgical process for recovering in pure metal form all Hydrometallurgical process for recovering in pure metal form all

1988-10-17

1990-05-22

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204115, 204117, 75120, 429 49, 423 95, 423559, C25C 118

Patent

active

049275100

ABSTRACT:
A process for recovering in pure metal form substantially all lead from battery sludge is disclosed. The battery sludge is desulfurized, leached with acid, and separated by filtration. Lead is recovered from the filtrate by electrowinning. The residue from the leaching and filtration is treated with concentrated sulfuric acid to cause the simultaneous occurring of the following reactions:

REFERENCES:
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patent: 4107007 (1978-08-01), Gaumann et al.
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patent: 4229271 (1980-10-01), Prengaman et al.
patent: 4269810 (1981-05-01), Kolakowski
patent: 4460442 (1984-07-01), Ducati
U.S. Pat. No. 1,148,062-Method of Utilizing Battery Waste-Clarence E. Tucker (Claims of patent only).
U.S. Bureau of Mines, Report of Investigations, No. 8857, 1984; A. Y. Lee et al.; Electrolytic Method for Recovery of Lead from Scrap Batteries, Scale-Up Study Using 20-Liter Multi-Electrode Cell.

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