摘要
研究了在碱性甲醇溶液中于温和条件下氧气氧化邻、间、对硝基甲苯分别制取邻、间、对硝基苯甲酸的新方法。在５０℃、２０ＭＰａ氧压下反应１２小时考察了邻、间、对硝基甲苯浓度对邻、间、对硝基苯甲酸收率的影响，发现当ＭＯＮＴ＝ＭＭＮＴ＝ＭＰＮＴ＝０２ｍｏｌ／Ｌ时，可分别获得８３３％、５８８％、６５％的最大对、邻、间硝基苯甲酸收率，且所有产物纯度均在９８５％以上。
Abstract A novel process for preparing p-,o-,m-nitrobenzoic acids by oxidation of p-,o-,m-nitrotoluenes with dioxygen in alkali-methanol solution was investigated.Effect of concentrations of p-,o-,m-nitrotoluenes on yields of p-,o-,m-nitrobenzoic acids was studied respectively at 50℃,2 0MPa O 2 for 12hrs,and maximum yields,83 3%,58 8%,6 5% with more than 98 5% purities corresponding to p-,o-,m-nitrobenzoic acids respectively,could be obtained while M PNT =M ONT =M MNT =0 2mol/L.
出处
《染料工业》
1998年第5期16-18,共3页
Dyestuff Industry
