氧气液相氧化一元取代甲苯制备芳香醛

Preparation of Aromatic Aldehyde by Autoxidation of Mono-substituted Toluene in Liquid Phase

研究了在酸碱不同体系下气氛液相氧化对氯甲苯、邻硝基甲苯制取相应芳香醛的反应 ,比较了反应温度、反应时间、氧气流量、底物浓度对各自反应的影响。初步研究了反应在酸碱不同条件下的反应机理 ,认为在醋酸体系下是自由基反应 ,而在有机胺体系下应是碳负离子反应。

It is investigated that preparation of aromatic akdehyde by liquid phase autoxidation of mono substituted toluene in acid or alkali system. Some process parameters such as temperature, reaction period, oxygen flow rate, and substrate concentration are compared.Different mechanism in acid or alkali system, radical reaction or carbanions, is also discussed.