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:
Feb. 01, 2022
Filed:
May. 09, 2019
Applicant:
Aqua Metals Inc., Alameda, CA (US);
Inventors:
Brian Dougherty, Emeryville, CA (US);
Michael John King, Oakland, CA (US);
Robert Lewis Clarke, Orinda, CA (US);
Stephen R. Clarke, Orinda, CA (US);
Michael David Hurwitz, Alameda, CA (US);
Assignee:
AQUA METALS INC., Alameda, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 10/54 (2006.01); C25C 1/18 (2006.01); C25C 5/02 (2006.01); C25C 7/00 (2006.01); C25C 7/08 (2006.01); H01M 4/14 (2006.01); H01M 10/06 (2006.01);
U.S. Cl.
CPC ...
H01M 10/54 (2013.01); C25C 1/18 (2013.01); C25C 5/02 (2013.01); C25C 7/00 (2013.01); C25C 7/005 (2013.01); C25C 7/007 (2013.01); C25C 7/08 (2013.01); H01M 4/14 (2013.01); H01M 10/06 (2013.01); Y02P 10/20 (2015.11); Y02W 30/84 (2015.05);
Abstract
Lead from lead acid battery scrap is recovered in two separate production streams as clean grid lead and as high-purity lead without smelting. In preferred aspects, lead recovery is performed in a continuous process that uses an aqueous electroprocessing solvent and electro-refining. Spent electroprocessing solvent and/or base utilized to treat lead paste from the lead acid battery scrap can be recycled to the recovery process.