Back to results
US 12,381,268 B2Granted
Process for the recovery of cathode materials in the recycling of batteries
AssigneeNorthvolt AB
InventorsMahmood Alemrajabi, Ingrid Karlsson, Ragnar Sjödahl, Emma Nehrenheim, Martina Petranikova, Cristian Tunsu
Life of this patent
Estimating the term…
Abstract
A process for removal of aluminium and iron in the recycling of rechargeable batteries comprising providing a leachate from black mass, adding phosphoric acid (H3PO4) to said leachate and adjusting the pH to form iron phosphate (FePO4) and aluminium phosphate (AlPO4), precipitating and removing the formed FePO4 and AlPO4, and forming a filtrate for further recovery of cathode metals, mainly NMC-metals and lithium.
Claims15
A process for recovery of cathode metals in the recycling of rechargeable batteries, said process comprising:
- providing a leachate from black mass, said leachate comprising cathode metals,
- adding phosphoric acid (H3PO4) to the provided leachate to provide a first subset of the cathode metals in phosphate form,
- adjusting the pH to an interval of pH 1.5 to 4,
- precipitating and removing the first subset of cathode metals in phosphate form from the leachate, and
- forming a filtrate for recovery of cathode metals, said cathode metals comprising a second subset of the cathode metals different from the first subset.
2 more elements
Dependencies are inferred from the claim text.