公开(公告)号：US11028460B2

公开(公告)日：2021-06-08

申请号：US15573356

申请日：2016-05-13

Applicant: Aqua Metals Inc.

Inventor： Robert Lewis Clarke ,  Brian Dougherty ,  Richard Clarke ,  Samaresh Mohanta

IPC: C25C1/00 ,  C22B3/00 ,  C25C1/18 ,  H01M10/06 ,  H01M10/54 ,  C25B15/08 ,  C25B1/22

Abstract: Lead is recovered from lead paste of a lead acid battery in a continuous process. The lead paste is contacted with a base to generate a supernatant and a precipitate. The precipitate is separated from the supernatant, and is contacted with an alkane sulfonic acid to generate a mixture of lead ion solution and insoluble lead dioxide. The lead dioxide is reduced with a reducing agent to form lead oxide, and the lead oxide is combined with the lead ion solution to form a combined lead ion solution to so allow a continuous process without lead dioxide accumulation. Lead is recovered from the combined lead ion solution using electrolysis.

公开(公告)号：US20180127852A1

公开(公告)日：2018-05-10

申请号：US15573356

申请日：2016-05-13

Applicant: Aqua Metals Inc.

Inventor： Robert Lewis Clarke ,  Brian Dougherty ,  Richard Clarke ,  Samaresh Mohanta

IPC: C22B3/00 ,  C25B15/08 ,  C25C1/18 ,  C25B1/22 ,  H01M10/06 ,  H01M10/54

CPC classification number: C22B13/045 ,  C25B1/22 ,  C25B15/08 ,  C25C1/18 ,  H01M10/06 ,  H01M10/54 ,  Y02P10/212 ,  Y02W30/84

Abstract: Lead is recovered from lead paste of a lead acid battery in a continuous process. The lead paste is contacted with a base to generate a supernatant and a precipitate. The precipitate is separated from the supernatant, and is contacted with an alkane sulfonic acid to generate a mixture of lead ion solution and insoluble lead dioxide. The lead dioxide is reduced with a reducing agent to form lead oxide, and the lead oxide is combined with the lead ion solution to form a combined lead ion solution to so allow a continuous process without lead dioxide accumulation. Lead is recovered from the combined lead ion solution using electrolysis.