Desulfation of battery mud

Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group iva metal

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423434, C01G 2114

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active

042737460

ABSTRACT:
In connection with the recycling of lead-acid batteries, lead-acid battery mud containing lead sulfate is desulfated by adding to the battery mud, which is maintained at a temperature less than 140.degree. F., an aqueous solution containing an ammonium reagent such as ammonium carbonate or ammonium bicarbonate. The ammonium reagent reacts with the lead sulfate to form an aqueous solution of ammonium sulfate and a lead carbonate precipitate. The aqueous solution of ammonium sulfate is then separated from the battery mud containing the lead carbonate precipitate.

REFERENCES:
patent: 1898405 (1933-02-01), Svendsen
patent: 3883348 (1975-05-01), Acoveno et al.
patent: 3892563 (1975-07-01), LaPoint
patent: 4118219 (1978-10-01), Elmore et al.
Handbook of Chemistry and Physics, Forty-third Edition, published by The Chemical Rubber Publishing Co. (1961), p. 2011.

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