Title:
METHOD FOR COMPREHENSIVE EXTRACTION OF METALS FROM SPENT LITHIUM-ION BATTERIES
Document Type and Number:
WIPO Patent Application WO/2021/134517
Kind Code:
A1
Abstract:
Disclosed is a method for the comprehensive extraction of metals from spent lithium-ion batteries. The steps of the method comprise, in sequence, acid dissolution (S1), alkalization and impurity removal (S2), extraction 1 (S3), extraction 2 (S4), extraction 3 (S5), electrodeposition (S6), purification and refinement (S7), and purification and preparation (S8). A raffinate 1 and a copper sulfate solution are obtained by means of the extraction 1 (S3) step, and the copper sulfate solution is subjected to the electrodeposition (S6) to obtain negative electrode copper; the raffinate 1 is subjected to the extraction 2 (S4) step to obtain a raffinate 2 and a manganese sulfate solution, and the manganese sulfate solution is subjected to the refinement (S7) to obtain a battery-grade manganese sulfate solution; and the raffinate 2 is subjected to the extraction 3 (S5) step to obtain a raffinate 3 and a battery-grade Ni-Co mixed solution, and the raffinate 3 is subjected to the purification and preparation (S8) to obtain battery-grade lithium carbonate. By means of the three extractions stage by stage, the copper, battery-grade Ni-Co mixed solution, battery-grade manganese sulfate solution and battery-grade lithium carbonate are recovered in sequence, thereby achieving the comprehensive recovery of multiple metal elements from spent lithium-ion batteries and increasing the overall metal recovery rate.
Inventors:
XU KAIHUA (CN)
JIANG ZHENKANG (CN)
LI QINXIANG (CN)
ZHANG KUN (CN)
WANG WENJIE (CN)
WANG JUN (CN)
WEN SHIHONG (CN)
JIANG ZHENKANG (CN)
LI QINXIANG (CN)
ZHANG KUN (CN)
WANG WENJIE (CN)
WANG JUN (CN)
WEN SHIHONG (CN)
Application Number:
PCT/CN2019/130635
Publication Date:
July 08, 2021
Filing Date:
December 31, 2019
Export Citation:
Assignee:
JINGMEN GEM NEW MAT CO LTD (CN)
GEM CO LTD (CN)
GEM CO LTD (CN)
International Classes:
H01M10/54
Foreign References:
| CN109449523A | 2019-03-08 | |||
| CN107117661A | 2017-09-01 | |||
| CN109207727A | 2019-01-15 | |||
| CN109735709A | 2019-05-10 |
Attorney, Agent or Firm:
WUHAN ZHI JIA JOINT INTELLECTUAL PROPERTY AGENCY (GENERAL PARTNERSHIP) (CN)
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