硝基苯液相催化氧化反应的研究

Study on Catalytic Hydrogention of Nitrbenzene in Liguid phase

硝基苯液相加氢 ,采用 0 .8% pd/c催化剂催化氧化制苯胺 ,该氧化过程是一个经历氧化偶氮苯 ,偶氮苯的复杂历程。在非溶剂状态下 ,反应的最佳工艺条件为催化剂用量 0 .5g/L( NB) ,反应温度 80℃ ,氢压 0 .6MPa,收率 99.9%。该法操作简单 ,生产成本低 ,污染少。

Amine was synthesized by hydrngenation of nitrobenzene in th e liquid pha se ,using 0.8% palladium on carbon cvataslyst The process is complen it goes th rough intermediates of azoxybenzene and azobenzene The optimum processing condit oon has been obtained in non-solvent:The catalyst concertration was 0.5g/l of ni trobenzene The reaction temperature was 80℃.The hydrogen pressure was 0.6mp a.The yield was 99.9%,The method reducecl cost and pollution