It can be divided into four methods to prepare manganic manganous oxide from the raw stuff: electrolytic product of manganese, manganoussalt, manganese oxide compound and manganese carbonate.
四氧化三锰的生产方法主要有四种：金属锰悬浮液法、锰盐法、高价锰氧化物法以及碳酸锰法。
2
Oxidizing agent was prepared by means of anhydrous manganous acetate dissolved in glacial acetic acid and oxidized to divalent manganic salt by potassium permanganate.