Title:
METHOD FOR RECOVERING ELEMENTAL COPPER IN WASTE LITHIUM-ION BATTERY POWDER AND APPLICATION
Document Type and Number:
WIPO Patent Application WO/2022/267419
Kind Code:
A1
Abstract:
Disclosed are a method for recovering elemental copper in waste lithium-ion battery powder and an application. The method comprises the following steps: adding concentrated sulfuric acid into lithium-ion battery powder for an aging reaction, adding water and a reducing agent for a water immersion reaction, and performing solid-liquid separation to obtain a solid phase and a metal liquid; adding water to the solid phase to make a slurry, and adding an alkaline solution to adjust the pH to obtain a first graphite slurry; and sorting the first graphite slurry to obtain a second graphite slurry and elemental copper powder. In the present invention, concentrated sulfuric acid is used to carbonize organic matter in lithium-ion battery powder, so that the organic matter is decomposed, i.e. an active substance, copper and aluminum covered by the organic matter are decomposed. As a result, the active substance of the battery powder is stripped from copper foil and aluminum foil, which may further activate the active substance in the battery powder, thus increasing the leaching rate of the battery powder in a water immersion stage and reducing the leaching rate of copper.
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Inventors:
HE RAN (CN)
TANG HONGHUI (CN)
LI LIANG (CN)
LYU DONGREN (CN)
JI BINCHUN (CN)
TANG HONGHUI (CN)
LI LIANG (CN)
LYU DONGREN (CN)
JI BINCHUN (CN)
Application Number:
PCT/CN2021/142945
Publication Date:
December 29, 2022
Filing Date:
December 30, 2021
Export Citation:
Assignee:
GUANGDONG BRUNP RECYCLING TECHNOLOGY CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
HUNAN BRUNP RECYCLING TECH CO LTD (CN)
HUNAN BRUNP VEHICLES RECYCLING CO LTD (CN)
International Classes:
C22B7/00; C22B1/00; C22B15/00; H01M10/0525; H01M10/54
Domestic Patent References:
| WO2021018372A1 | 2021-02-04 |
Foreign References:
| CN113528824A | 2021-10-22 | |||
| CN107326181A | 2017-11-07 | |||
| CN112400029A | 2021-02-23 | |||
| CN110828926A | 2020-02-21 | |||
| CN110835682A | 2020-02-25 | |||
| CN109921123A | 2019-06-21 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
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