H - Electricity – 01 – M
Patent
H - Electricity
01
M
H01M 10/54 (2006.01) C01D 15/00 (2006.01) C22B 26/12 (2006.01)
Patent
CA 2730336
The method relates to a pyrometallurgical and hydrometallurgical process for the recovery and recycling of lithium and vanadium compounds from a material comprising spent rechargeable lithium batteries, particularly lithium metal gel and solid polymer electrolyte rechargeable batteries. The method involves providing a mass of the material, hardening it by cooling at a temperature below room temperature, comminuting the mass of cooled and hardened material, digesting with an acid its ashes obtained by incineration, or its solidified salts obtained by molten salt oxidation, or the comminuted mass itself, to give a mother liquor, extracting vanadium compounds from the mother liquor, separating heavy metals and aluminium therefrom, and precipitating lithium carbonate from the remaining solution.
Cardarelli Francois
Dube Jonathan
Bathium Canada Inc.
Mcmillan Llp
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