Discussion on the separation and impurity removal of cobalt and nickel in sulfuric acid systems
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The customer has a cobalt sulfate solution and wants to obtain cobalt sulfate heptahydrate using the evaporation crystallization method. The solution contains impurity nickel, with a nickel-cobalt ratio of 1/2000. It is necessary to reduce the nickel-to-cobalt ratio in cobalt sulfate heptahydrate to below 1/4000; it seems that extraction is a costly method for achieving this, and after searching through many sources, no solution was found I would like to ask for the help of Haiyou here; thank you.
Using a nickel-removing agent, nickel can be removed directly, while cobalt remains in the solution.
Which medication is more suitable?