摘要
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。
Mn(Ⅲ) is one of the most important oxidants for some organic synthesis. Usually, it is generated from the anodic oxidation of Mn(Ⅱ), but it can also be obtained from roasted MnO 2 ore. The possibility of the preparation of formaldehyde from methanol oxidized by Mn(Ⅲ) is studied in this paper, with a purpose of finding a new way to make use of MnO 2 ore. Results show that the following conditions favor the formation of formaldehyde: H 2SO 4 concentration is more than 9 mol/L, temperature is higher than 90℃, and mole concentration of methanol is 10 times more than that of Mn(Ⅲ).
出处
《中国锰业》
1999年第1期34-38,共5页
China Manganese Industry
基金
广东省自然科学基金
关键词
氧化
甲醇
甲醛
锰
软锰矿
Manganese (Ⅲ) Oxidation Methanol Formaldehyde
