Title:
METHOD FOR RECOVERING WASTE LITHIUM COBALT OXIDE BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/098167
Kind Code:
A1
Abstract:
Disclosed in the present invention is a method for recovering a waste lithium cobalt oxide battery, the method comprising: feeding a lithium cobalt oxide battery black powder in a column-shaped container, adding a first acid to the column-shaped container for heat leaching until solids in the column-shaped container are not reduced any more so as to obtain a first leachate and leaching residues, wherein the first acid is a weak acid, and a filtering structure is arranged at the bottom of the column-shaped container; and adding a second acid to the column-shaped container containing the leaching residues for heat leaching until solids in the column-shaped container are not reduced any more so as to obtain a second leachate and graphite, wherein the second acid is a strong acid. According to the present invention, the leaching method of the battery black powder is changed, and the acid-resistant column-shaped container is selected to be used in cooperation with the first acid and the second acid to perform selective heat leaching for leaching, such that on the one hand, consumption of an inorganic strong acid can be reduced, emission of strong acid gas is reduced, and green and low-carbon heat leaching of the black powder is achieved; and on the other hand, the column-shaped container having a filtering structure is used, such that the acid consumption can be saved.
Inventors:
ZHONG YINGSHENG (CN)
YU HAIJUN (CN)
XIE YINGHAO (CN)
LI AIXIA (CN)
LI BO (CN)
LI CHANGDONG (CN)
YU HAIJUN (CN)
XIE YINGHAO (CN)
LI AIXIA (CN)
LI BO (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2022/114550
Publication Date:
June 08, 2023
Filing Date:
August 24, 2022
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
YICHANG BRUNP CONTEMPORARY AMPEREX CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
YICHANG BRUNP CONTEMPORARY AMPEREX CO LTD (CN)
International Classes:
C22B7/00; C01B32/215; C01F7/141; C22B3/00; C22B3/04; C22B3/40; C22B26/12; H01M10/54
Domestic Patent References:
| WO2019150403A1 | 2019-08-08 |
Foreign References:
| CN114317970A | 2022-04-12 | |||
| CN113517484A | 2021-10-19 | |||
| CN107429313A | 2017-12-01 | |||
| CN108432031A | 2018-08-21 | |||
| CN109852801A | 2019-06-07 | |||
| CN110620277A | 2019-12-27 | |||
| JP2007122885A | 2007-05-17 |
Attorney, Agent or Firm:
JIAQUAN IP LAW (CN)
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