公开(公告)号：US20220274841A1

公开(公告)日：2022-09-01

申请号：US17597482

申请日：2020-07-24

Applicant: BASF SE

Inventor： Wolfgang ROHDE ,  Birgit GERKE ,  Kerstin SCHIERLE-ARNDT ,  Torben ADERMANN ,  Matthias VOGES ,  Regina GELSANG

IPC: C01D15/00 ,  C22B26/12 ,  C22B7/00 ,  C22B3/12 ,  H01M10/54 ,  C01D15/08

Abstract: A process for the recovery of lithium from waste lithium ion batteries or parts thereof is disclosed. The process comprising the steps of (a) providing a particulate material containing a transition metal compound and/or transition metal, wherein the transition metal is selected from the group consisting of Mn, Ni and Co, and wherein further at least a fraction of said Ni and/or Co, if present, are in an oxidation state lower than +2, and at least a fraction of said Mn, if present, is manganese(II)oxide; which particulate material further contains a lithium salt and a fluoride salt, and which particulate material optionally contains calcium provided that the element ratio calcium to fluorine is 1.7 or less or is zero; (b) treating the material provided in step (a) with a polar solvent and an alkaline earth hydroxide; and (c) separating the solids from the liquid, optionally followed by washing the solid residue with a polar solvent such as water provides good separation of lithium in high purity, and recovery of valuable transition metals.