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A mixed extractant system has been developed for the separation and purification of cobalt and lithium from spent lithium-ion battery leach solutions. The addition of Acorga M5640 to the Ionquest 801 organic solution generated a significant pH isotherm shift for copper with a ΔpH 50 value of 3.45. As a result, the separation of iron(III), copper and aluminium from cobalt, nickel and lithium...
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