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公开(公告)号：US20250115487A1
公开(公告)日：2025-04-10
申请号：US18729269
申请日：2023-01-13
Applicant: DOWA ECO-SYSTEM CO., LTD.
Inventor： Chihiro NISHIKAWA , Shota TAHATA , Ryoei WATANABE , Changzhi LIU , Shohei YOSHIDA
Abstract: Provided is a method of recovering valuable materials that is a method of recovering lithium carbonate from a lithium-ion secondary battery, where the lithium carbonate has a boron content of less than 1 ppm and a calcium content of 100 ppm or less. The method includes a heat treatment step, a crushing and classification step, a slurry formation step, a wet magnetic separation step, an acid leaching step, a neutralization step, a neutralized cake solid-liquid separation step, a calcium carbonate crystallization step, a calcium carbonate solid-liquid separation step, and a calcium adsorption and removal step.
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公开(公告)号：US11482737B2
公开(公告)日：2022-10-25
申请号：US16733525
申请日：2020-01-03
Applicant: DOWA ECO-SYSTEM CO., LTD.
Inventor： Chihiro Nishikawa , Yoshihiro Honma , Norio Nakajima
IPC: H01M10/54 , H01M10/0525 , H01M4/66 , H01M4/587 , H01M50/116 , B03C1/10 , B02C23/10 , B02C23/20 , B03C1/28 , H01M4/02
Abstract: There is provided a means capable of recovering a valuable material such as cobalt and nickel, with a low grade of a metal derived from a negative electrode current collector, a low grade of fluorine, and a low grade of a material derived from a negative electrode active material. A method for recovering a valuable material from a lithium ion secondary battery, is characterized in that it includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a classification step of classifying a crushed object obtained through the crushing step into a coarse particle product and a fine particle product; and a wet magnetic separation step of performing wet magnetic separation on the fine particle product obtained through the classification step.
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3.发明申请Method for Recovering Valuable Material from Lithium-Ion Secondary Battery, and Recovered Material Containing Valuable Material 有权从锂离子二次电池中回收有价值材料的方法以及含贵重材料的回收材料公开(公告)号：US20130287621A1
公开(公告)日：2013-10-31
申请号：US13927428
申请日：2013-06-26
Applicant: DOWA ECO-SYSTEM Co., Ltd.
Inventor： Koji FUJITA , Satoshi KAWAKAMI , Yoshihiro HONMA , Ryoei WATANABE
CPC classification number: C22C19/07 , C22B7/007 , C22B23/005 , C22B23/04 , C22B23/0407 , H01M10/0525 , H01M10/54 , Y02P10/234 , Y02T10/7011 , Y02W30/84
Abstract: A method for recovering a valuable material from a lithium-ion secondary battery, the method contains: roasting a lithium-ion secondary battery containing a valuable material in a metal battery case thereof to obtain a roasted material; stirring the roasted material with liquid to separate contents containing the valuable material from the inside of the metal battery case; and sorting the contents separated by the separation and the metal battery case to obtain a recovered material containing the valuable material.
Abstract translation: 一种从锂离子二次电池中回收有价值的材料的方法，该方法包括：在其金属电池壳体中焙烧含有贵重材料的锂离子二次电池以获得焙烧材料; 用液体搅拌焙烧的物料，将含有贵重物质的内容物从金属电池盒的内部分离; 并分离由分离物和金属电池壳体分离的内容物，以获得含有有价物质的回收材料。
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公开(公告)号：US12107244B2
公开(公告)日：2024-10-01
申请号：US16733537
申请日：2020-01-03
Applicant: DOWA ECO-SYSTEM CO., LTD.
Inventor： Chihiro Nishikawa , Yoshihiro Honma , Norio Nakajima
CPC classification number: H01M10/54 , B02C19/186 , B02C23/10 , B02C23/14 , B02C23/16 , B03C1/30 , H01M10/0525 , B03C2201/20
Abstract: A method for recovering a valuable material from a lithium ion secondary battery includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a first stage of classification step of classifying a crushed object obtained through the crushing step based on a classification point of 1.2 to 2.4 mm, and a second stage of classification step of classifying an intermediate product and a fine particle product obtained on a fine side in the first stage of classification step based on a classification point of 0.3 mm or less; and a dry magnetic separation step of repeating one time or more a step of performing dry magnetic separation on an intermediate product obtained on a coarse side in the second stage of classification step and performing dry magnetic separation again.
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公开(公告)号：US20230318063A1
公开(公告)日：2023-10-05
申请号：US18024825
申请日：2021-09-03
Applicant: DOWA ECO-SYSTEM CO., LTD.
Inventor： Yoji SUGANUMA , Hiroki NAGAHARA , Minoru YOSHIHARA , Chihiro NISHIKAWA , Ryoei WATANABE , Yoshihiro HONMA , Masataka YAMASHITA
CPC classification number: H01M10/54 , C22B21/0092 , C22B7/005 , C22B15/0013 , B09B3/40
Abstract: A method for recovering a valuable substance is provided. The method includes: a thermal treatment step of thermally treating a target containing a valuable substance while supporting a target storing unit, in which the target is stored, by a supporting unit that can support the target storing unit, wherein the thermally treating includes heating a gas present in a region, in which the supporting unit is positioned, by a flame for thermally treating the target such that the target storing unit is not contacted by the flame; and a valuable substance recovering step of recovering the valuable substance from a thermally treated product of the target obtained in the thermal treatment step.
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Patent Agency Ranking
公开(公告)号：US20230083016A1
公开(公告)日：2023-03-16
申请号：US17797548
申请日：2021-01-29
Applicant: DOWA ECO-SYSTEM CO., LTD.
Inventor： Tatsuya YODOSE , Ryoei WATANABE , Hitoshi SASAKI , Chihiro NISHIKAWA , Yoshihiro HONMA
Abstract: Provided is a sorting method for valuable resources, including a thermal treatment step of thermally treating a target containing valuable resources, to melt aluminum and separate a melt, a pulverizing step of pulverizing a thermally treated product remaining after the melt is separated, to obtain a pulverized product, a magnetic sorting step of sorting the valuable resources from the pulverized product by a magnetic force, and a wind force sorting step of sorting one valuable resource from another valuable resource in the valuable resources by a wind force.
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公开(公告)号：US20220396852A1
公开(公告)日：2022-12-15
申请号：US17772041
申请日：2020-09-10
Applicant: DOWA ECO-SYSTEM CO., LTD.
Inventor： Chihiro NISHIKAWA , Yoshihiro HONMA , Ryoei WATANABE
Abstract: Provided is a method for separating lithium from a lithium solution containing lithium by 200 mg/L or more and fluorine by 20 mg/L or more, the method including: a first removal step of adding a first component, which solidifies the fluorine contained in the lithium solution, to the lithium solution and removing the fluorine solidified to obtain a F-removed liquid; and a second removal step of adding a second component, which solidifies the first component remaining in the F-removed liquid, to the F-removed liquid and removing the first component solidified to obtain a first component-removed liquid.
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公开(公告)号：US20210210806A1
公开(公告)日：2021-07-08
申请号：US16733525
申请日：2020-01-03
Applicant: DOWA ECO-SYSTEM CO., LTD.
Inventor： Chihiro NISHIKAWA , Yoshihiro HONMA , Norio NAKAJIMA
IPC: H01M10/54 , H01M10/0525 , H01M4/66 , H01M4/587 , H01M2/02 , B03C1/28 , B03C1/10 , B02C23/10 , B02C23/20
Abstract: There is provided a means capable of recovering a valuable material such as cobalt and nickel, with a low grade of a metal derived from a negative electrode current collector, a low grade of fluorine, and a low grade of a material derived from a negative electrode active material. A method for recovering a valuable material from a lithium ion secondary battery, is characterized in that it includes: a heat treatment step of performing heat treatment on a lithium ion secondary battery; a crushing step of crushing a heat-treated object obtained through the heat treatment step; a classification step of classifying a crushed object obtained through the crushing step into a coarse particle product and a fine particle product; and a wet magnetic separation step of performing wet magnetic separation on the fine particle product obtained through the classification step.
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公开(公告)号：US20250153229A1
公开(公告)日：2025-05-15
申请号：US18833619
申请日：2022-02-02
Applicant: DOWA ECO SYSTEM CO., LTD.
Inventor： Yoshinori MORITA , Ryoei WATANABE , Tatsuya YODOSE , Kengo MIURA
IPC: B09B3/35 , B03C7/06 , B09B101/15 , H10F19/00
Abstract: There is provided a method for processing a solar cell module, including: removing a frame member from a solar cell module to obtain a frame-removed material; crushing the frame-removed material to obtain a crushed material; and electrostatically separating the crushed material, wherein in the electrostatic separation, the crushed material is charged and separated in accordance with density and conductivity.
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10.发明授权Method for recovering valuable material from lithium-ion secondary battery, and recovered material containing valuable material 有权从锂离子二次电池中回收有价物质的方法以及含有价值材料的回收材料公开(公告)号：US09359659B2
公开(公告)日：2016-06-07
申请号：US13927428
申请日：2013-06-26
Applicant: DOWA ECO-SYSTEM Co., Ltd.
Inventor： Koji Fujita , Satoshi Kawakami , Yoshihiro Honma , Ryoei Watanabe
CPC classification number: C22C19/07 , C22B7/007 , C22B23/005 , C22B23/04 , C22B23/0407 , H01M10/0525 , H01M10/54 , Y02P10/234 , Y02T10/7011 , Y02W30/84
Abstract: A method for recovering a valuable material from a lithium-ion secondary battery, the method contains: roasting a lithium-ion secondary battery containing a valuable material in a metal battery case thereof to obtain a roasted material; stirring the roasted material with liquid to separate contents containing the valuable material from the inside of the metal battery case; and sorting the contents separated by the separation and the metal battery case to obtain a recovered material containing the valuable material.
Abstract translation: 一种从锂离子二次电池中回收有价值的材料的方法，该方法包括：在其金属电池壳体中焙烧含有贵重材料的锂离子二次电池以获得焙烧材料; 用液体搅拌焙烧的物料，将含有贵重物质的内容物从金属电池盒的内部分离; 并分离由分离物和金属电池壳体分离的内容物，以获得含有有价物质的回收材料。
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