Purification of nickel and cobalt in ferrous chloride and ferrous sulfate solutions
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In solutions with high concentrations of ferrous chloride and ferrous sulfate, the iron ion concentration is around 60 grams per liter, while the concentrations of nickel and cobalt ions are both around 0.05 grams per liter. What methods can be used in large-scale industrial production to reduce the concentrations of nickel and cobalt to below 0.001 grams per liter? How to purify?
For nickel, a nickel purifier can be used; as for cobalt, it depends on how the sulfidation process is progressing.
It’s unknown what the effect of nickel purifiers will be; using sulfidation for cobalt is definitely not an option. It’s unclear as well what the effect of resin adsorption will be Has anyone done it?