Title:
PREPARATION METHOD FOR ALUMINUM NITRIDE
Document Type and Number:
WIPO Patent Application WO/2023/029572
Kind Code:
A1
Abstract:
The present invention relates to the field of recycling of waste lithium batteries. Disclosed is a preparation method for aluminum nitride. The preparation method comprises the following steps: adding a sodium hydroxide solution to waste positive electrode powder for reaction, and performing solid-liquid separation to obtain a sodium aluminate solution and positive electrode powder; adding acid to the sodium aluminate solution for reaction, performing solid-liquid separation, and extracting a solid phase to obtain an aluminum hydroxide precipitate; performing water washing and sieving on a negative current collector, performing solid-liquid separation, extracting a solid phase, and adding nitric acid for reaction, and performing solid-liquid separation to obtain a graphite material and copper nitrate; mixing the aluminum hydroxide precipitate with the graphite material, granulating the mixture, and then adding copper nitrate for mixing, and performing a calcination reaction to obtain aluminum nitride and copper oxide. According to the present invention, nitrogen does not need to be additionally conveyed in the aluminum nitride synthesis process, and a self-sufficiency state is always kept in the reaction process, so that the reaction is more stable, and the purity of the generated aluminum nitride is high.
Inventors:
CAI HAIBING (CN)
LIU WEI (CN)
LIU YONGQI (CN)
LI CHANGDONG (CN)
GONG QINXUE (CN)
LIU WEI (CN)
LIU YONGQI (CN)
LI CHANGDONG (CN)
GONG QINXUE (CN)
Application Number:
PCT/CN2022/092488
Publication Date:
March 09, 2023
Filing Date:
May 12, 2022
Export Citation:
Assignee:
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP EV RECYCLING CO LTD (CN)
International Classes:
C01B21/072; C01G3/02; C22B1/02; C22B1/24; C22B7/00; C22B15/00; C22B21/00; C25B1/34; H01M10/54
Domestic Patent References:
| WO2017134779A1 | 2017-08-10 |
Foreign References:
| CN113753867A | 2021-12-07 | |||
| CN106082149A | 2016-11-09 | |||
| CN111129632A | 2020-05-08 | |||
| CN106882773A | 2017-06-23 | |||
| CN111020194A | 2020-04-17 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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