| abstract |
A water removal and/or recycling process from a liquor containing sodium sulfate and/or sodium hydrosulfate obtained by processing substantially lithium-free cobalt resource materials, comprising the steps of precipitation of cobalt as cobalt carbonate or cobalt hydroxide, after which it is removed from the liquor, sodium sulfate and sodium dithionate are crystallized and the crystals are removed, after which the crystals are heated to anhydrous sodium sulfate, sulfur dioxide and water, and then the Sodium sulfate. |