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利用Ｍｎ（Ⅲ）作氧化剂氧化一些有机物具有很高的选择性。Ｍｎ（Ⅲ）通常是由Ｍｎ（Ⅱ）阳极氧化制备，也可以通过焙烧二氧化锰矿得到。文章探讨了Ｍｎ（Ⅲ）氧化甲醇制甲醛的可行性，目的在于寻找利用软锰矿的新途径，并分析了反应的可能产物，确定出反应的最佳条件。结果表明，甲醇相对过量，甲醇与Ｍｎ（Ⅲ）的浓度比大于１０∶１，在９ｍｏｌ／Ｌ的Ｈ２ＳＯ４溶液中，９０℃以上温度有利于Ｍｎ（Ⅲ）氧化甲醇转变成甲醛。
The use of Mn (Ⅲ) as an oxidant oxidation of some organic matter has a high selectivity. Mn (III) is usually prepared by anodic oxidation of Mn (II) and can also be obtained by calcining manganese dioxide. The article discussed the feasibility of Mn (Ⅲ) oxidation of methanol to formaldehyde. The purpose was to find new ways to utilize the pyrolusite, to analyze the possible products of the reaction and to determine the optimum reaction conditions. The results showed that the methanol over Mn (Ⅲ) concentration ratio was more than 10:1. In 9mol / L H2SO4 solution, the temperature above 90 ℃ was favorable for the conversion of Mn (Ⅲ) to methanol.