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By A.J. Roan
Metal Tech News 

Liquid CO2 to work for clean REE recovery

Canada unveils carbon-negative electronic waste recycling tech Metal Tech News – July 12, 2023


Last updated 7/18/2023 at 8:03am

Gisele Azimi and Kevin Zhang pose for photo holding recovered REEs.

University of Toronto Engineering; Safa Jinje

University of Toronto Engineering Professor Gisele Azimi stands next to PhD candidate Jiakai (Kevin) Zhang, who holds a solution containing metal nitrates and tributyl phosphate complexes (lithium, nickel, manganese and cobalt) obtained using supercritical fluid extraction from a lithium-ion battery cell used in an electric vehicle.

A team of researchers out of the University of Toronto has pioneered a method of separating critical minerals and metals from electronic waste, such as electric vehicle batteries and wind turbine magnets, by using captured carbon dioxide and a little pressure to provide the critical materials needed for a zero-carbon future.

While conventional rare earth ores typically contain 1 to 2% of these...

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