Process for recovering lead oxides from exhausted batteries
AssigneesToxco, Inc., Kinsbursky Brothers Inc
InventorsSteven A. Kinsbursky, W. Novis Smith, Richard Schutte
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Abstract
A process for recovering lead oxides from the spent paste of exhausted lead acid batteries. The process provides heating the spent paste with an alkali hydroxide solution at elevated temperatures prior to calcinations. Calcination is at various temperatures so that either lead mono-oxide, lead dioxide or red lead is obtained as the principal product. There is also provided the use of the lead oxide to prepare the paste for positive and negative electrodes or other lead compounds.
Claims8
A process for separating and producing lead oxides in a substantially pure state from spent paste obtained from exhausted lead acid batteries, which comprises the steps of:
- A) treating spent paste obtained from exhausted lead acid batteries with an alkali hydroxide solution,
- B) heating the mixture obtained from step “A” at a temperature between 40-100° C.,
- C) filtering the mixture from step “B” and washing the filter cake formed with water, and then
- D) heating the filter cake from step “C” at a temperature in increments between 350-500° C. and red lead is obtained.
Dependencies are inferred from the claim text.