US 12,224,414 B2
Method and system for recovery of metals from spent lithium ion batteries
Amol Naik, Noida (IN); Rupesh Singh, Noida (IN); Vipin Tyagi, Bellevue, WA (US); and Nishchay Chadha, Singapore (SG)
Assigned to AGR LITHIUM INC., Houston, TX (US)
Filed by AGR LITHIUM INC., Bellevue, WA (US)
Filed on Aug. 24, 2023, as Appl. No. 18/237,751.
Claims priority of provisional application 63/400,938, filed on Aug. 25, 2022.
Prior Publication US 2024/0072320 A1, Feb. 29, 2024
Int. Cl. H01M 10/00 (2006.01); C22B 1/24 (2006.01); C22B 3/22 (2006.01); C22B 7/00 (2006.01); H01M 10/54 (2006.01)
CPC H01M 10/54 (2013.01) [C22B 1/24 (2013.01); C22B 3/22 (2013.01); C22B 7/007 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method of obtaining a metal salt from a spent lithium-ion (Li-ion) battery, the method comprising:
contacting a leaching solvent to a portion of the spent Li-ion battery to obtain a first dispersion;
heating the first dispersion to a temperature in a range from 50° C. to 90° C. by applying microwave radiation;
maintaining the temperature of the first dispersion in the range from 50° C. to 90° C. for a period in a range from 10 seconds to 5 minutes by further applying microwave radiation to the heated first dispersion;
filtering the first dispersion to obtain a first filtrate; and
contacting a first base with the first filtrate to increase a pH of the first filtrate to a first predetermined value at which a first metal salt is precipitated from the first filtrate.