Process for producing manganese compound and potassium sulfate from material comprising potassium and manganese

摘要

The present invention relates to a process for preparing high purity manganese compounds and high purity potassium sulphate from low purity manganese and potassium containing products. The method for preparing a high purity manganese compound and potassium sulfate from a low purity manganese and potassium containing material according to the present invention comprises the steps of adding water to a low purity manganese and potassium containing material and then adding a first potassium leaching solution containing potassium through first solid- Separating the first solid; Adding a sulfide to the first potassium leaching solution to remove first impurities, and preparing high purity potassium sulfate using sulfuric acid; Adding the sulfuric acid to the first solid to convert it to manganese sulfate, removing the second impurity using at least one of calcium hydroxide and sulfide, and obtaining a manganese leach solution through a second solid-liquid separation; And preparing a high purity manganese compound from the manganese leach solution. As a result, a high purity manganese compound (manganese sulfate monohydrate, sodium manganese manganese, EMM (electronic manganese metal) and high purity potassium sulfate) can be produced simultaneously from economically low-purity manganese and potassium-containing products through one process.