酸化マンガン(VII) 化学特性,用途語,生産方法
化学的特性
dark red oil; hygroscopic [KIR81]
調製方法
Concentrated H2SO4 (15 ml., d 1.84) is placed in a dry porcelain mortar precleaned with chromo sulfuric acid; then 23 g of KMnO4 is carefully added over 10-15 minutes while constantly stirring with a pestle. The following precautions must be observed to obtain the desired result: only very pure KMnO4 crystals, free of dust and organic substances (do not reduce the crystals to powder), can be used. The reaction slurry should be left standing overnight in a dry spot, protected against dust. Porous pyrolusite is formed during this time, and the Mn2O7 oil is very gently kneaded out from it. Proper safety measures must be observed during the preparation and further workup of the material since it often explodes for no apparent reason (an asbestos face shield with safety glasses and heavy leather gloves should be worn, and one should work behind a heavy glass plate and a fine wire screen). Yield: 10 g. (62%). The product is entirely free of K+ and SO42-.
2 KMnO4 + 2 H2SO4 = 2 KHSO, + Mn2O7 + H2O
参考文献
A. Simon, et al., Angew. Chem. Int. Ed. Engl., 26, 139 (1987), DOI: 10.1002/anie.198701391; Angew. Chem., 99, 160 (1987), DOI: 10.1002/ange.19870990225.
酸化マンガン(VII) 上流と下流の製品情報
原材料
準備製品