公开(公告)号：US11072864B2

公开(公告)日：2021-07-27

申请号：US16435245

申请日：2019-06-07

Applicant: Aqua Metals Inc.

Inventor： Robert Lewis Clarke ,  Samaresh Mohanta

IPC: C25C1/18 ,  C22B3/12 ,  C22B3/16 ,  C25C7/00 ,  C25C7/02 ,  C25C7/08 ,  C22B3/04 ,  C22B3/08 ,  C22B3/00

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.

公开(公告)号：US10793957B2

公开(公告)日：2020-10-06

申请号：US15573393

申请日：2016-05-13

Applicant: Aqua Metals Inc.

Inventor： Stephen R. Clarke ,  Robert Lewis Clarke ,  Brian Dougherty

IPC: C25C1/18 ,  C25C7/02 ,  C25C7/04 ,  H01M10/06 ,  H01M10/54 ,  C25C7/00

Abstract: A closed loop electrochemical process of recovery of high-purity lead uses continuous formation of adherent lead on a cathode from an electrolyte that is used to dissolve desulfated lead paste. Preferred cathodes include aluminum containing cathodes that are operated in methane sulfonic acid to produce a micro- or nanoporous mixed matrix metallic composition and lead dioxide formation at the anode is avoided using appropriate anode configurations or operating conditions

公开(公告)号：US20190301031A1

公开(公告)日：2019-10-03

申请号：US16435245

申请日：2019-06-07

Applicant: Aqua Metals Inc.

Inventor： Robert Lewis Clarke ,  Samaresh Mohanta

IPC: C25C1/18 ,  C22B3/12 ,  C22B3/16 ,  C22B3/00 ,  C22B3/08 ,  C22B3/04 ,  C25C7/08 ,  C25C7/00 ,  C25C7/02

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.

公开(公告)号：US20190267681A1

公开(公告)日：2019-08-29

申请号：US16407914

申请日：2019-05-09

Applicant: Aqua Metals Inc.

Inventor： Brian Dougherty ,  Michael John King ,  Robert Lewis Clarke ,  Stephen R. Clarke ,  Michael David Hurwitz

IPC: H01M10/54 ,  C25C7/00 ,  C25C5/02 ,  C25C1/18 ,  C25C7/08 ,  H01M10/06 ,  H01M4/14

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.

公开(公告)号：US10340561B2

公开(公告)日：2019-07-02

申请号：US15527749

申请日：2015-05-13

Applicant: Aqua Metals Inc.

Inventor： Brian Dougherty ,  Michael John King ,  Robert Lewis Clarke ,  Stephen R. Clarke ,  Michael David Hurwitz

IPC: C25C1/18 ,  C25C5/02 ,  C25C7/00 ,  C25C7/08 ,  H01M4/14 ,  H01M10/06 ,  H01M10/54

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.

公开(公告)号：US20180069276A1

公开(公告)日：2018-03-08

申请号：US15810808

申请日：2017-11-13

Applicant: Aqua Metals Inc.

Inventor： Stephen R. Clarke ,  Robert Lewis Clarke ,  Michael David Hurwitz ,  Michael John King ,  Selwyn Mould

IPC: H01M10/54 ,  C25C7/00 ,  C25C7/08 ,  H01M10/06 ,  H01M4/14 ,  C25C1/18 ,  C25C5/02

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, and spent electroprocessing solvent can be recycled to the recovery process.

公开(公告)号：US20160294024A1

公开(公告)日：2016-10-06

申请号：US15037318

申请日：2014-11-18

Applicant: AQUA METALS INC.

Inventor： Stephen R. Clarke ,  Robert Lewis Clarke ,  Michael David Hurwitz ,  Michael John King ,  Selwyn Mould

IPC: H01M10/54 ,  H01M10/06 ,  H01M4/14 ,  C25C1/18 ,  C25C7/00

CPC classification number: H01M10/54 ,  C25C1/18 ,  C25C5/02 ,  C25C7/00 ,  C25C7/005 ,  C25C7/007 ,  C25C7/08 ,  H01M4/14 ,  H01M10/06 ,  Y02P10/212 ,  Y02W30/84

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 and spent electroprocessing solvent can be recycled to the recovery process.

Abstract translation: 来自铅酸蓄电池废料的铅在两个单独的生产流中被回收，作为干净的电网引线和高纯度铅而不进行冶炼。 在优选的方面，铅回收在使用水性电处理溶剂的连续方法中进行，并且电精炼和废电加工溶剂可以再循环到回收过程中。