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.