Advancing sustainable pathways for recovering energy critical metals is crucial for accelerating the energy transition. One of the less explored but highly promising pathways to separate rare earth elements from transition group metals involves harnessing differences in the solubilities of the carbonate salts of these metals. In this study, we discuss pathways to precipitate rare earth metal carbonates by harnessing regenerable solvents which create soluble complexes with transition metals such as nickel. Nickel is electrodeposited while the solvent is regenerated, and high purity CO<sub>2</sub> is produced. In this study, we discuss the effectiveness of various solvents for selective recovery of rare earth elements and transition metals such as nickel. The physico-chemical parameters that result in more than 90% recovery of rare earth elements and 80% recovery of nickel are discussed.

Reactive separation of rare earth elements and transition group metals using CO<sub>2</sub>

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Reactive separation of rare earth elements and transition group metals using CO2

Reactive separation of rare earth elements and transition group metals using CO₂