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    METHOD FOR SEPARATING LITHIUM
    4.
    发明申请
    METHOD FOR SEPARATING LITHIUM 有权

    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

    IPC: C22B26/12 ,  C22B3/06 ,  C22B3/22 ,  C22B3/44 ,  H01M10/54

    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.

    METHOD FOR RECOVERING VALUABLE MATERIAL FROM LITHIUM ION SECONDARY BATTERY
    5.
    发明申请
    METHOD FOR RECOVERING VALUABLE MATERIAL FROM LITHIUM ION SECONDARY BATTERY 有权

    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.

    Soil cleaning method
    6.
    发明授权
    Soil cleaning method 有权
    土壤清洗方法

    公开(公告)号：US09421589B2

    公开(公告)日：2016-08-23

    申请号：US13810044

    申请日：2010-07-15

    Applicant: Shunsuke Yoshi ,  Masaru Tomoguchi

    Inventor： Shunsuke Yoshi ,  Masaru Tomoguchi

    IPC: B03C1/005 ,  B09C1/00 ,  B03C1/01 ,  B03C1/30 ,  B07B15/00 ,  B09C1/02

    CPC classification number: B09C1/00 ,  B03C1/005 ,  B03C1/01 ,  B03C1/30 ,  B03C2201/20 ,  B07B15/00 ,  B09C1/02

    Abstract: The present invention provides a soil cleaning method. The soil cleaning method is characterized in that after a pre-treatment step of mixing a dehydrating agent in soil to reduce a water content of the soil to 10 mass % or less is performed, a magnetic separation step of feeding the soil whose water content is reduced to 10 mass % or less in the pre-treatment step, to a dry magnetic separator to separate and remove a contaminant in coarse soil as magnetically attracted matter is performed. By bringing the soil into a dry state to separate the soil into magnetically attracted matter and magnetically unattracted matter and collecting the heavily contaminated magnetically attracted matter, it is possible to facilitate separating fine soil from contaminated soil, which makes it possible to easily reduce the content of the contaminant in the coarse soil.

    Abstract translation: 本发明提供一种土壤清洁方法。 土壤清洗方法的特征在于，在将土壤中的脱水剂混合以将土壤的含水量降低至10质量％以下的预处理步骤之后，进行含水量为 在预处理步骤中减少到10质量％以下的干燥磁选机，以分离和除去粗大土壤中的污染物，因为进行磁性吸附物质。 通过使土壤处于干燥状态，将土壤分解成磁吸引物质和无磁性物质，并收集严重污染的磁吸引物质，可以方便地将细土与污染土壤分离，从而可以容易地减少含量 的粗糙土壤中的污染物。

    METHOD OF SEPARATING VALUABLE MATERIALS
    8.
    发明公开
    METHOD OF SEPARATING VALUABLE MATERIALS 审中-公开

    公开(公告)号：US20240243381A1

    公开(公告)日：2024-07-18

    申请号：US18561768

    申请日：2022-03-01

    Applicant: DOWA ECO-SYSTEM CO., LTD.

    Inventor： Masataka YAMASHITA ,  Yoshihiro HONMA ,  Chihiro NISHIKAWA ,  Jiahao LIU ,  Shota TAHATA ,  Changzhi LIU

    IPC: H01M10/54 ,  C22B1/02 ,  C22B7/00

    CPC classification number: H01M10/54 ,  C22B1/02 ,  C22B7/005

    Abstract: A method of separating valuable materials. The method includes a heat treatment step of performing a heat treatment on a lithium-ion secondary battery including valuable materials, a crushing step of crushing a heat-treated product obtained in the heat treatment step, and a classification step including a first classification step of classifying a crushed product obtained in the crushing step into a coarse-particle product and an intermediate product at a classification cut-point of 0.6 mm or greater and 2.4 mm or less, and a second classification step of classifying the intermediate product into a medium-particle product and a fine-particle product at a classification cut-point of 40 μm or greater and 300 μm or less.

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