Title:
METHOD AND DEVICE FOR RECYCLING COBALT METAL IN LITHIUM-ION BATTERY WASTE
Document Type and Number:
WIPO Patent Application WO/2022/000830
Kind Code:
A1
Abstract:
A method and device for recycling a cobalt metal in a lithium-ion battery waste. The recycling method comprises the following steps: step one, mixing a solid waste with an alkali metal solution, fully reacting the mixture, and chelating same to form a cobalt-organic matter intermediate; step two, performing solid-liquid separation on a solution containing the cobalt-organic matter intermediate and a solid mixture; and step three, performing a hydrothermal reaction on the solution containing the cobalt-organic matter intermediate, and crystalizing to form the cobalt hydroxide powder, wherein the solid waste in the step one is a waste containing a cobalt element in a lithium-ion battery; when the solid waste is mixed with the alkali metal solution, grinding and drying pretreatments are carried out; when the solid-liquid separation in the step two is performed, washing and/or alcohol washing is performed on the solid surface. According to the present method, in a closed system, the alkali metal solution is used to react with the solid mixture for extracting the cobalt element. The reaction condition is mild, and no waste is discharged to the external environment. The solvent therein can be recycled. The present method is fast in reaction and low in cost, and is a simple, convenient, and energy-saving method for effectively recycling the cobalt element in the lithium battery.
More Like This:
Inventors:
WANG LVYANG (CN)
XU TINGTING (CN)
XU TINGTING (CN)
Application Number:
PCT/CN2020/117684
Publication Date:
January 06, 2022
Filing Date:
September 25, 2020
Export Citation:
Assignee:
UNIV SHENZHEN TECHNOLOGY (CN)
International Classes:
C22B7/00; C01G51/04; C22B3/00; C22B3/02; C22B23/00
Foreign References:
| CN111647752A | 2020-09-11 | |||
| CN110724820A | 2020-01-24 | |||
| CN107774675A | 2018-03-09 | |||
| CN102517448A | 2012-06-27 | |||
| CN110747340A | 2020-02-04 | |||
| CN110129571A | 2019-08-16 | |||
| CN109266868A | 2019-01-25 | |||
| CN103482710A | 2014-01-01 | |||
| CN103490062A | 2014-01-01 | |||
| CN107022683A | 2017-08-08 | |||
| CN101219812A | 2008-07-16 | |||
| CN108878866A | 2018-11-23 | |||
| JPH11265737A | 1999-09-28 |
Attorney, Agent or Firm:
SHENZHEN YU MEI PATENT AGENCY (SPECIAL GENERAL PARTNERSHIP) (CN)
Download PDF: