Process for Preparing Lead by Electroreduction with Ammonium Sulfate and Ammonia
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United States of America Patent
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Aug 8, 2019
app pub date -
Jul 10, 2017
filing date -
Jul 10, 2017
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Abstract
A process for preparing lead by electroreduction with ammonium sulfate and ammonia is provided. In the process, an ammonium sulfate aqueous solution is used as an electrolyte, a lead compound is used as a raw material, titanium is used as an anode, stainless steel or lead is used as a cathode, and a direct-current electric field is applied in an electrolytic bath; the lead compound is reduced to metal lead after obtaining electrons at the cathode; and at the anode, ammonia is oxidized to nitrogen for escaping, and H+ ions are generated simultaneously; sulfate radical ions and chloride ions in the lead compound enter the solution and react with the ammonia water to form ammonium sulfate and ammonium chloride; and the lead monoxide and lead dioxide in the lead compound are reduced to a metal lead and OH− ions are released to combine with the H+ ions to form water.
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