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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
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.
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公开(公告)号：US10566665B2
公开(公告)日：2020-02-18
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
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.
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公开(公告)号：US20170352927A1
公开(公告)日：2017-12-07
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
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. Spent electroprocessing solvent and/or base utilized to treat lead paste from the lead acid battery scrap can be recycled to the recovery process.
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公开(公告)号：US10665907B2
公开(公告)日：2020-05-26
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
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.
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公开(公告)号：US20180355494A1
公开(公告)日：2018-12-13
申请号：US15573393
申请日：2016-05-13
Applicant: Aqua Metals Inc.
Inventor： Stephen R. Clarke , Robert Lewis Clarke , Brian Dougherty
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
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Patent Agency Ranking
公开(公告)号：US09837689B2
公开(公告)日：2017-12-05
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
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.
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公开(公告)号：US11239507B2
公开(公告)日：2022-02-01
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
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.
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公开(公告)号：US10316420B2
公开(公告)日：2019-06-11
申请号：US14957026
申请日：2015-12-02
Applicant: Aqua Metals Inc.
Inventor： Robert Lewis Clarke , Samaresh Mohanta
IPC: C25C1/18 , C22B3/12 , C25C7/08 , C22B3/04 , C22B3/08 , C22B3/16 , C22B3/00 , 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.
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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
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.
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公开(公告)号：US20170159191A1
公开(公告)日：2017-06-08
申请号：US14957026
申请日：2015-12-02
Applicant: Aqua Metals Inc.
Inventor： Robert Lewis Clarke , Samaresh Mohanta
IPC: C25C1/18 , C25C7/00 , C25C7/08 , C22B3/04 , C22B3/12 , C22B3/08 , C22B3/16 , C25C7/02 , C22B3/00
CPC classification number: C25C1/18 , C22B3/045 , C22B3/08 , C22B3/12 , C22B3/16 , C22B13/045 , C25C7/007 , C25C7/02 , C25C7/08 , Y02P10/234 , Y02W30/84
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.
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