Title:
METHOD FOR RECOVERING WASTE LITHIUM BATTERY POSITIVE ELECTRODE MATERIAL
Document Type and Number:
WIPO Patent Application WO/2022/062675
Kind Code:
A1
Abstract:
The present invention belongs to the field of the recovery of lithium ion batteries. Disclosed is a method for recovering a waste lithium battery positive electrode material. The method comprises the following steps: (1) carrying out acid leaching on a waste lithium battery positive electrode material, so as to obtain a leachate; (2) adding iron powder to the leachate for reduction, so as to obtain sponge copper and a post-copper-removal liquid; (3) heating the post-copper-removal liquid, then adding a waste battery positive electrode powder, mixing same, carrying out a reaction, regulating the pH to be acidic, and filtering same to obtain an iron-aluminum residue and a filtrate; and (4) carrying out extraction on the filtrate to obtain a nickel cobalt manganese sulfate solution and a raffinate, carrying out coprecipitation on the nickel cobalt manganese sulfate solution to obtain a ternary precursor, adding an alkali liquor to the raffinate, and filtering same to obtain lithium carbonate. In the method for recovering a waste lithium battery positive electrode material provided in the present invention, ferrous ions in the post-copper-removal liquid are used as a reducing agent to leach out lithium manganate, lithium cobalt oxide, and the metal elements nickel, cobalt and manganese from a ternary battery positive electrode plate powder, so that lithium is efficiently recovered therefrom.
Inventors:
CHEN XINGEN (CN)
TANG HONGHUI (CN)
LI LIANG (CN)
LIU YONGQI (CN)
CAO LEIJUN (CN)
LI CHANGDONG (CN)
TANG HONGHUI (CN)
LI LIANG (CN)
LIU YONGQI (CN)
CAO LEIJUN (CN)
LI CHANGDONG (CN)
Application Number:
PCT/CN2021/110323
Publication Date:
March 31, 2022
Filing Date:
August 03, 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:
C01G53/00; C01D5/00; C01D15/08; H01M10/54
Foreign References:
| CN112158894A | 2021-01-01 | |||
| CN111082043A | 2020-04-28 | |||
| CN111206153A | 2020-05-29 | |||
| CN110983045A | 2020-04-10 | |||
| CN111270073A | 2020-06-12 | |||
| US20040028585A1 | 2004-02-12 |
Attorney, Agent or Firm:
ADVANCE CHINA IP LAW OFFICE (CN)
Download PDF: