Uptake of heavy metals by chelating resins from acidic manganese chloride solution

A proposed process for the direct production of battery-grade MnO2 leaches manganese ore with HCL to remove heavy metals selectively. The acidic manga nese chloride solution produced is contaminated with Cu, Ni, Co, Pb and Fe at levels that preclude immediate utilization. This paper reports on screen ing tests to measure the uptake of Cu, Ni, Co, Pb, Fe and Mn from acidic ch loride solutions onto different chelating ion exchange resins. Dow M-4195, which contains the bis-picolylamine functional group, showed promise for de toxifying manganese chloride process solutions. Column ion-exchange tests d emonstrated the ability of this resin to produce pure manganese chloride so lution from an acidic manganese chloride leach solution contaminated by Cu, Ni, Co, Pb and Fe.