Treatment of Cobalt Sulfate / Cobalt Dithionate Liquid from Cobalt Source

摘要

A method of removing and / or recirculating water of a sodium sulfate and / or sodium dithionate containing liquid resulting from the treatment of a substantially lithium-free cobalt source material, the method comprising the steps of: After precipitating as monocobalt or cobaltous hydroxide, this is removed from the liquid, sodium sulfate and sodium dithionate are crystallized, and after removing the crystals, the crystals are heated to give anhydrous sodium sulfate, sulfur dioxide and water. Then, anhydrous sodium sulfate is separated. [Selection diagram] Figure 1