Invention Grant
- Patent Title: Systems and methods for aqueous recovery of lead from lead acid batteries with reduced electrolyte demand
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Application No.: US17618325Application Date: 2020-06-12
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Publication No.: US11708640B2Publication Date: 2023-07-25
- Inventor: Samaresh Mohanta , Joshua Hufford
- Applicant: Aqua Metals Inc.
- Applicant Address: US NV Reno
- Assignee: Aqua Metals Inc.
- Current Assignee: Aqua Metals Inc.
- Current Assignee Address: US NV McCarran
- Agency: Umberg Zipser LLP
- International Application: PCT/US2020/037539 2020.06.12
- International Announcement: WO2020/252343A 2020.12.17
- Date entered country: 2021-12-10
- Main IPC: C25C1/18
- IPC: C25C1/18 ; C01G21/06 ; C22B1/00 ; C22B1/11 ; C22B3/00 ; H01M10/54
Abstract:
Lead is recovered from lead paste of a lead acid battery in a continuous and electrochemical lead recovery process. In especially preferred aspects, lead paste is processed to remove residual sulfates, and the so treated lead paste is subjected to a thermal treatment step that removes residual moisture and reduces lead dioxide to lead oxide. Advantageously, such pretreatment will avoid lead dioxide accumulation and electrolyte dilution.
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