Treatment of primary cobalt sulfate / dithionate solution from a cobalt source

摘要

A process for removing and / or recycling water from a sodium sulphate and / or sodium dithionate containing liquid derived from the treatment of a cobalt source material essentially free of lithium, comprising the steps of reacting cobalt with a first cobalt carbonate or a first cobalt hydroxide Crystallizing the sodium sulfate and sodium dithionate, heating the crystals after the crystals are removed to form anhydrous sodium sulfate, sulfur dioxide and water , And then separating anhydrous sodium sulfate.