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公开(公告)号：US20220341051A1
公开(公告)日：2022-10-27
申请号：US17618325
申请日：2020-06-12
Applicant: Aqua Metals Inc.
Inventor： Samaresh Mohanta , Joshua Hufford
Abstract: Lead is recovered from lead paste of a lead acid battery in a continuous and electrochemical lead recovery process. In especially preferred aspects, lead paste is processed to remove residual sulfates, and the so treated lead paste is subjected to a thermal treatment step that removes residual moisture and reduces lead dioxide to lead oxide. Advantageously, such pretreatment will avoid lead dioxide accumulation and electrolyte dilution.
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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：US20180127888A1
公开(公告)日：2018-05-10
申请号：US15573410
申请日：2016-05-13
Applicant: Aqua Metals Inc.
Inventor： Stephen R. Clarke , Michael John King , Brian Dougherty , Michael David Hurwitz
IPC: C25C1/18 , C25C5/02 , H01M4/16 , H01M4/68 , H01M4/73 , H01M4/84 , H01M10/06 , B82Y40/00 , B21J1/06 , B21K23/00
CPC classification number: C25C1/18 , B21J1/06 , B21K23/00 , B82Y40/00 , C25C5/02 , H01M4/14 , H01M4/16 , H01M4/68 , H01M4/73 , H01M4/84 , H01M10/06 , Y02W30/84
Abstract: The inventive subject matter is directed to continuous electrochemical production of highly pure micro- or nanostructured lead that at least partially encloses the electroprocessing solvent and molecular hydrogen and optional guest compounds to form a mixed matrix. Such compositions are particularly suitable for cold forming of various structures and/or for alloy and composite material production.
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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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Patent Agency Ranking
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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7.发明公开公开(公告)号：US20230313400A1
公开(公告)日：2023-10-05
申请号：US18330246
申请日：2023-06-06
Applicant: Aqua Metals Inc.
Inventor： Samaresh Mohanta , Joshua Hufford
Abstract: Lead is recovered from lead paste of a lead acid battery in a continuous and electrochemical lead recovery process. In especially preferred aspects, lead paste is processed to remove residual sulfates, and the so treated lead paste is subjected to a thermal treatment step that removes residual moisture and reduces lead dioxide to lead oxide. Advantageously, such pretreatment will avoid lead dioxide accumulation and electrolyte dilution.
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公开(公告)号：US11708640B2
公开(公告)日：2023-07-25
申请号：US17618325
申请日：2020-06-12
Applicant: Aqua Metals Inc.
Inventor： Samaresh Mohanta , Joshua Hufford
Abstract: Lead is recovered from lead paste of a lead acid battery in a continuous and electrochemical lead recovery process. In especially preferred aspects, lead paste is processed to remove residual sulfates, and the so treated lead paste is subjected to a thermal treatment step that removes residual moisture and reduces lead dioxide to lead oxide. Advantageously, such pretreatment will avoid lead dioxide accumulation and electrolyte dilution.
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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：US10689769B2
公开(公告)日：2020-06-23
申请号：US15573410
申请日：2016-05-13
Applicant: Aqua Metals Inc.
Inventor： Stephen R. Clarke , Michael John King , Brian Dougherty , Michael David Hurwitz
IPC: H01M4/16 , H01M4/68 , C25C1/18 , H01M10/06 , C25C5/02 , H01M4/14 , B21J1/06 , B82Y40/00 , H01M4/73 , H01M4/84 , B21K23/00
Abstract: The inventive subject matter is directed to continuous electrochemical production of highly pure micro- or nanostructured lead that at least partially encloses the electroprocessing solvent and molecular hydrogen and optional guest compounds to form a mixed matrix. Such compositions are particularly suitable for cold forming of various structures and/or for alloy and composite material production.
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