Process for reducing lead peroxide formation during lead electrowinning
AssigneeRSR Limited
InventorsRaymond D. Prengaman, Herschel B. McDonald
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Abstract
An electrolyte and a process for reducing lead peroxide formation when electrowinning lead from inorganic acid solutions are disclosed. In accordance with the invention, arsenic is added to an inorganic acid electrolyte containing lead, whereby oxygen is evolved at the anode while lead peroxide formation is reduced or eliminated during electrolysis.
Claims14
A process for reducing lead peroxide formation when electrowinning lead from an inorganic acid electrolyte, which comprises dissolving at least 250 ppm of arsenic ion in the electrolyte and thereafter electrowinning the lead while maintaining an arsenic ion concentration of at least 250 ppm.
In a process for electrowinning lead from an inorganic acid electrolyte containing the lead as dissolved salts employing an insoluble anode, the improvement which comprises dissolving and maintaining in the electrolyte sufficient arsenic ion to cause gassing at the anode during electrowinning.
An improved inorganic acid electrolyte for electrowinning lead, characterized in that the electrolyte contains arsenic ion in an amount sufficient to cause gassing at the anode during electrolysis.
Dependencies are inferred from the claim text.