US 12,412,941 B2
Method for recycling lithium batteries
Christian Hanisch, Braunschweig (DE); Tobias Elwert, Clausthal-Zellerfeld (DE); and Lisa Brückner, Clausthal-Zellerfeld (DE)
Assigned to Duesenfeld GmbH, Wendeburg (DE)
Appl. No. 17/628,275
Filed by DUESENFELD GMBH, Wendeburg (DE)
PCT Filed Jul. 26, 2019, PCT No. PCT/EP2019/070286
§ 371(c)(1), (2) Date Jan. 19, 2022,
PCT Pub. No. WO2021/018372, PCT Pub. Date Feb. 4, 2021.
Prior Publication US 2022/0320619 A1, Oct. 6, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 10/54 (2006.01); C22B 3/00 (2006.01); C22B 7/00 (2006.01); C22B 15/00 (2006.01); C22B 26/12 (2006.01); C22B 47/00 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 10/54 (2013.01) [C22B 7/007 (2013.01); C22B 15/0071 (2013.01); C22B 23/043 (2013.01); C22B 23/0484 (2013.01); C22B 26/12 (2013.01); C22B 47/0063 (2013.01); C22B 47/0081 (2013.01); H01M 10/0525 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for recycling lithium batteries, comprising:
digesting a comminuted material containing comminuted components of electrodes of lithium batteries using concentrated sulphuric acid,
wherein the comminuted material is not pyrometallurgically treated prior to digesting with concentrated sulphuric acid,
wherein digesting is performed such that a waste gas and a digestion material are produced,
discharging the waste gas, and
performing wet chemical extraction of at least one metallic component of the digestion material,
wherein the communited material contains fluoride components and wherein the digestion is conducted such that fluoride components in the comminuted material pass into the waste gas as gaseous fluorine compounds.