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Title:
RECOVERY METHOD AND PREPARATION METHOD FOR PRUSSIAN POSITIVE ELECTRODE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2024/060510
Kind Code:
A1
Abstract:
The present text discloses a recovery method and a preparation method for a Prussian positive electrode material. The recovery method comprises first dissolving in non-oxidizing acid a Prussian positive electrode material disassembled from a battery to obtain a clear solution, then introducing an oxygen source into the clear solution to carry out an oxidation reaction, and carrying out solid-liquid separation to then obtain a transition metal oxyhydroxide and a solution containing H4[Fe(CN)6] and/or H4[Mn(CN)6]. The recovery method of the present application can effectively separate and extract transition metal elements in the Prussian material which are not coordinated with cyanide without producing cyanide ions and hydrocyanic acid during the process, and the recovered solution may be further processed into raw material for synthesizing the Prussian positive electrode material. The recovery method can treat the Prussian positive electrode material in waste sodium batteries on a large scale, and the treatment process is non-toxic, harmless, and straightforward. The recovery method exhibits favorable economic benefits.

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Inventors:
LI AIXIA (CN)
YU HAIJUN (CN)
XIE YINGHAO (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2023/077941
Publication Date:
March 28, 2024
Filing Date:
February 23, 2023
Export Citation:
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Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
International Classes:
H01M10/54; C01C3/12; H01M4/58
Foreign References:
CN115411394A2022-11-29
CN107591584A2018-01-16
CN109439907A2019-03-08
CN114188626A2022-03-15
CN115058598A2022-09-16
JP2017084681A2017-05-18
Attorney, Agent or Firm:
BEIJING YZH IP FIRM et al. (CN)
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