Abstract: High purity manganese chloride was prepared after the impurity removal process，which adopted electrolytic man- ganese as the raw material.The process included using H2O2 to eliminate Fe，H2S to eliminate Ni and Pb，and recrystallization to eliminate Ni，Si，and Se.According to the experimental results，mechanism analysis was given by analyzing the electro- chemical potential and chemical reaction equilibrium.The research showed that，Fe，Pb，and P can be removed completely by the reaction of replacement，hydrolysis and precipitation.Ni，Si and Se，which were very stable，can also be removed above 94% after crystallized two times.The purity of the product finally got was greater than 99.99%.Contents of the six impurity elements mentioned above were all less than 1.5 μg/g.

Key words: electrolytic manganese, high purity, impurity removal, manganese chloride