With acid leaching using 20-30% solids, 94-96% Li, Co, Ni, and Mn, was extracted. The leach liquor was subjected to selective sequential multi-stage solvent extraction and precipitation route to extract >96-99.9% multiple variant pure salts of lithium, nickel, cobalt, and manganese. High pure graphite is a derivative product of the process. The process enables the recovery of acid and reagents.
Complete separation among Li, Ni, Co, and Mn
. Chemistry of Batteries Tested: LCO, LCA, LMO, NMC, NCA
96-99.9% pure multiple variant salts as products
. No impurity of Fe, Al, and Cu in any critical metal product
Aluminum, Copper: 99% recovery
. Total recycling of reagents with 85% recovery of acid
. Residual carbon is converted to High Pure Graphite
. Easily replicable on a large scale
. Easily replicable on a large scale
National Metallurgical Laboratory (NML)
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