The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 11, 2019
Filed:
Dec. 02, 2015
Applicant:
Aqua Metals Inc., Alameda, CA (US);
Inventors:
Robert Lewis Clarke, Orinda, CA (US);
Samaresh Mohanta, San Diego, CA (US);
Assignee:
Aqua Metals Inc., Alameda, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25C 1/18 (2006.01); C22B 3/12 (2006.01); C25C 7/08 (2006.01); C22B 3/04 (2006.01); C22B 3/08 (2006.01); C22B 3/16 (2006.01); C22B 3/00 (2006.01); C25C 7/00 (2006.01); C25C 7/02 (2006.01);
U.S. Cl.
CPC ...
C25C 1/18 (2013.01); C22B 3/045 (2013.01); C22B 3/08 (2013.01); C22B 3/12 (2013.01); C22B 3/16 (2013.01); C22B 13/045 (2013.01); C25C 7/007 (2013.01); C25C 7/02 (2013.01); C25C 7/08 (2013.01); Y02P 10/234 (2015.11); Y02W 30/84 (2015.05);
Abstract
Lead is recycled from lead paste of lead acid batteries in a process that employs alkaline desulfurization followed by formation of plumbite that is then electrolytically converted to pure lead. Remaining insoluble lead dioxide is removed from the lead plumbite solution and reduced to produce lead oxide that can be fed back to the recovery system. Sulfate is recovered as sodium sulfate, while the so produced lead oxide can be added to lead paste for recovery.