Systems and methods for purifying and recycling lead from spent lead-acid batteries

The present disclosure relates to systems and methods by which lead from spent lead-acid batteries may be extracted, purified, and used in the production of new lead-acid batteries. Such a system may include a first phase separation device (76) configured to receive the first mixture from the basic lead stream digestion device (192), isolate a liquid component (196) from one or more insoluble components (78) of the first mixture, and output the liquid component (196). The system also includes a lead salt precipitation device (200) configured to receive and mix the liquid component and a carboxylate source (201) to form a second mixture including a lead salt precipitate and output the second mixture. The system further includes a second phase separation device (92) configured to receive the second mixture from the lead salt precipitation device (200), isolate the liquid component (96) from the lead salt precipitate (94) of the second mixture, and output the lead salt precipitate, which may later be converted into leady oxide particles (100).