Systems and methods for recovery of lead from lead acid batteries
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United States of America Patent
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Jun 8, 2021
Grant Date -
May 10, 2018
app pub date -
May 13, 2016
filing date -
May 13, 2015
priority date (Note) -
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Abstract
Lead is recovered from lead paste of a lead acid battery in a continuous process. The lead paste is contacted with a base to generate a supernatant and a precipitate. The precipitate is separated from the supernatant, and is contacted with an alkane sulfonic acid to generate a mixture of lead ion solution and insoluble lead dioxide. The lead dioxide is reduced with a reducing agent to form lead oxide, and the lead oxide is combined with the lead ion solution to form a combined lead ion solution to so allow a continuous process without lead dioxide accumulation. Lead is recovered from the combined lead ion solution using electrolysis.
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