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Metal ion recovery device and metal ion recovery method UPDATE 新技術説明会

外国特許コード F180009419
整理番号 Q13968US
掲載日 2018年4月25日
出願国 アメリカ合衆国
出願番号 201414910973
公報番号 20160201163
公報番号 9932653
出願日 平成26年8月7日(2014.8.7)
公報発行日 平成28年7月14日(2016.7.14)
公報発行日 平成30年4月3日(2018.4.3)
国際出願番号 JP2014070806
国際公開番号 WO2015020121
国際出願日 平成26年8月7日(2014.8.7)
国際公開日 平成27年2月12日(2015.2.12)
優先権データ
  • 特願2013-165034 (2013.8.8) JP
  • 2014WO-JP70806 (2014.8.7) WO
発明の名称 (英語) Metal ion recovery device and metal ion recovery method UPDATE 新技術説明会
発明の概要(英語) (US9932653)
Solution is a metal ion recovery device, in which a permselective membrane for selectively permeating Li is used, and on both main faces of the plate-like permselective membrane, a mesh-like negative electrode and a positive electrode are formed, respectively.
This structure is provided in a treatment tank, and in the treatment tank, the permselective membrane partitions between a stock solution containing a Li ion, and a recovery solution into which Li is recovered.
As the permselective membrane, lithium nitride (Li3N), Li10GeP2S12, (Lax, Liy)TiOz, Li1+x+yAlx(Ti, Ge)2-xSiyP3-yO12, and the like, which are super lithium ion conductors, can be used.
特許請求の範囲(英語) [claim1]
1. A metal ion recovery device for, from a stock solution as an aqueous solution containing a lithium (Li) in the form of Li ion, recovering Li ion into a recovery solution, comprising: a plate-shaped permselective membrane constituted by an ion conductor of Li,
a mesh-shaped positive electrode electrically connected and fixed to one main face of said permselective membrane, and
a mesh-shaped negative electrode electrically connected and fixed to another main face of said permselective membrane, said stock solution and said recovery solution being partitioned by said permselective membrane, said positive electrode and said negative electrode being fixed thereto.
[claim2]
2. The metal ion recovery device according to claim 1, wherein, between the one main face of said permselective membrane and said positive electrode, and between the another main face of said permselective membrane and said negative electrode, a porous and electrically conductive current collector made of a different material than both the positive electrode and the negative electrode is inserted, respectively.
[claim3]
3. The metal ion recovery device according to claim 2, wherein, said permselective membrane is composed of several parts made of sintered compacts in an in-plane direction,
said current collector is fixed to said one main face, and to said another main face of said permselective membrane, respectively,
said positive electrode is fixed to said current collector formed on said one main face, and
said negative electrode is fixed to said current collector formed on said another main face.
[claim4]
4. The metal ion recovery device according to claim 2, wherein said current collector is formed of a carbon felt.
[claim5]
5. The metal ion recovery device according to claim 1, wherein there is provided a configuration in which said recovery solution is circulated.
[claim6]
6. The metal ion recovery device according to claim 1, where said recovery solution is hydrochloric acid (HCl).
[claim7]
7. A metal ion recovery method for recovering Li ion contained in said stock solution into said recovery solution by using the metal ion recovery device according to claim 1.
[claim8]
8. The metal ion recovery method according to claim 7, wherein a voltage is applied across said positive electrode and said negative electrode.
[claim9]
9. A metal ion recovery method for recovering Li ion contained in said stock solution into said recovery solution by using the metal ion recovery device according to claim 1, and then adding sodium carbonate (Na2CO3) to said recovery solution.
[claim10]
10. The metal ion recovery device according to claim 1, wherein, Li ionic conductivity of said permselective membrane is higher than or equal to 10-4 S.cm-1.
[claim11]
11. The metal ion recovery device according to claim 10, where said permselective membrane is formed of any one of Li3N, Li10GeP2S12, (Lax, Liy)TiOz (where x=2/3-a, y=3a-2b, z=3-b, 0<a<=1/6, 0<=b<=0.06, and y>0), and Li1+x+yAlx(Ti, Ge)2-xSiyP3-yO12 (where 0<=x<=0.6, and 0<=y<=0.6).
  • 発明者/出願人(英語)
  • HOSHINO TSUYOSHI
  • NATIONAL INSTITUTES FOR QUANTUM AND RADIOLOGICAL SCIENCE AND TECHNOLOGY
国際特許分類(IPC)

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