Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...
Patent
1994-06-27
1995-10-24
McCarthy, Neil
Liquid purification or separation
Processes
Making an insoluble substance or accreting suspended...
210712, 210713, 210724, 423 95, 423559, C02F 166
Patent
active
054607302
ABSTRACT:
Lead oxide is used for neutralizing the sulfuric acid wastewater received from washing charged (formed) electrodes during lead battery production. The neutralization product, including lead sulfate and excess lead oxide, is returned directly to production of the active mass paste. The mother liquor, after a possible use as cleaning water, is subjected to another neutralization with lead oxide, separate from the wastewater received from the electrode washing procedure in view of its possible content of impurities. The resulting lead sulfate is sent to a metal-processing facility for recycling. The neutral mother liquor, after the removal of lead residues by conventional precipitation methods and filtration, is discharged as treated water.
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D. Berndt, Maintenance-Free Batteries, A Handbook of Battery Technology, pp. 183-184, Research Studies Press Ltd., Taunton, Somerset, England, 1992.
Czerny Thomas
Jostes Rainer
McCarthy Neil
Varta Batterie Aktiengesellschaft
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