Patent · US Active

Process for the recovery of cathode materials in the recycling of batteries by removing aluminum and iron

US11509000B2 · kind B2 · utility

1Cited by

0References

20Claims

0Family size

Assignee

NORTHVOLT AB · SE

Inventors

Mahmood ALEMRAJABI · Stockholm, SE
Ingrid Karlsson · Stockholm, SE
Ragnar SJÖDAHL · Stockholm, SE
Emma NEHRENHEIM · Stockholm, SE
Martina Petranikova · Gothenburg, SE
Cristian TUNSU · Gothenburg, SE

Key dates

Filing date	Apr 14, 2020
Grant date	Nov 22, 2022
Priority date	—
Expiry date	Apr 14, 2040

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02W30/84
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.