NOVELTY - Process for recovering lead oxide from component of lead-acid battery involves contacting a component of lead-acid battery with a mixture comprising nitric acid solution to reduce at least a portion of residual lead compounds and alloys comprising the component, where lead in the portion of residual lead compounds and alloys is reduced from an insoluble tetravalent state to a soluble divalent state to form a slurry with lead-rich filtrate, filtering and contacting the lead-rich filtrate with sulfuric acid, to obtain lead sulfate paste and nitric acid.    USE - Process for recovering lead oxide from component of lead-acid battery (claimed).    ADVANTAGE - The method enables manufacture of high-purity (more than 99.99%) lead metal recovered from the used lead acid batteries, and high-purity (more than 99.99%) lead monoxide, high-purity (more than 99.99%) lead dioxide and high-purity (more than 99.99%) red lead from paste obtained from used lead acid batteries.    DETAILED DESCRIPTION - Process for recovering lead oxide from component of lead-acid battery involves contacting a component of lead-acid battery with a mixture comprising nitric acid solution to reduce at least a portion of residual lead compounds and alloys comprising the component, where lead in the portion of residual lead compounds and alloys is reduced from an insoluble tetravalent state to a soluble divalent state to form a slurry with a lead-rich filtrate, filtering the slurry to separate (102) plastics and separators comprising the component from the lead-rich filtrate, and contacting the lead-rich filtrate with sulfuric acid, to obtain lead sulfate paste and nitric acid. An INDEPENDENT CLAIM is included for plant for recovering lead oxide from component of lead-acid battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view explaining the production process of lead oxide from spent lead-acid batteries.    Dismantling of batteries (101)    Recovery of spent acid (101A)    Separation process (102)    Cleaning of separators (103)    Cleaning of plastics (104)