Title:
SYNERGISTIC EXTRACTION METHOD FOR SELECTIVELY SEPARATING LITHIUM AND TRANSITION METALS FROM WASTE BATTERIES BY USING HYDROPHOBIC DEEP EUTECTIC SOLVENT
Document Type and Number:
WIPO Patent Application WO/2024/001716
Kind Code:
A1
Abstract:
A synergistic extraction method for selectively separating lithium and transition metals from waste batteries by using a hydrophobic deep eutectic solvent, relating to the technical field of hydrometallurgy. Provided is a synergistic extraction method having a good separation and extraction effect. Specifically disclosed are a hydrophobic deep eutectic solvent and tributyl phosphate (TBP) synergistic extractant and a method for separating lithium and transition metals from a waste lithium battery leachate. The hydrophobic deep eutectic solvent provided in the present application comprises n-decanoic acid (a hydrogen bond donor) and lidocaine (a hydrogen bond acceptor). The method comprises the following steps: (1) preparation of a hydrophobic deep eutectic solvent; (2) preparation of an organic phase for extraction; (3) co-extraction of nickel, cobalt and manganese; (4) stripping of nickel, cobalt and manganese; and (5) lithium precipitation. According to the present invention, the extraction effect on transition metals: nickel, cobalt and manganese, is good, the purity of lithium in the remaining water phase is high, efficient recovery of valuable metals in a waste lithium battery positive electrode material leachate is implemented, and the used deep eutectic solvent is a "novel green" solvent that is small in pollution, simple and convenient to synthesize, and low in price.
Inventors:
CHEN BIAOHUA (CN)
GUO YU (CN)
YU GANGQIANG (CN)
DAI CHENGNA (CN)
LIU NING (CN)
XU RUINIAN (CN)
WANG NING (CN)
GUO YU (CN)
YU GANGQIANG (CN)
DAI CHENGNA (CN)
LIU NING (CN)
XU RUINIAN (CN)
WANG NING (CN)
Application Number:
PCT/CN2023/099256
Publication Date:
January 04, 2024
Filing Date:
June 09, 2023
Export Citation:
Assignee:
UNIV BEIJING TECHNOLOGY (CN)
International Classes:
C22B26/12; C22B3/38
Foreign References:
| CN115074551A | 2022-09-20 | |||
| CN112226632A | 2021-01-15 | |||
| CN111187911A | 2020-05-22 | |||
| CN111270073A | 2020-06-12 | |||
| CN114438343A | 2022-05-06 | |||
| US20170077564A1 | 2017-03-16 | |||
| US20200399737A1 | 2020-12-24 |
Other References:
ZHANG HEPENG; CHEN JINQING: "Research Progress of Hydrophobic Eutectic Solvent Extraction of Metal Ions", YOUSE JINSHU KEXUE YU GONGCHENG - NONFERROUS METALS SCIENCE AND ENGINEERING, YOUSE JINSHU KEXUE YU GONGCHENG BIANJIBU, vol. 12, no. 4, 31 August 2021 (2021-08-31), pages 9 - 18, XP009551937, ISSN: 1674-9669, DOI: 10.13264/j.cnki.ysjskx.2021.04.002
Attorney, Agent or Firm:
BEIJING SIHAI TIANDA INTELLECTUAL PROPERTY AGENT LTD. (CN)
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