硝基苯催化加氢制备对氨基苯酚工艺研究

Study on the Preparation of p-Aminophenol from Nitrobenzene Hydrogenation

采用Pt/SiO2为催化剂,在高压反应器内进行了硝基苯催化加氢合成对氨基苯酚实验。研究了温度、压力、硫酸浓度、催化剂用量等因素对反应的影响,优化了反应条件,并考察了催化剂的反复使用对其催化活性的影响,最佳工艺条件:反应温度为85℃,17%稀硫酸,0.4MPa压力下,Pt/SiO2催化剂5g,产品纯度可达98%以上。

The preparation of p-aminophenol by catalyst hydrogenation of nitrobenzene on Pt/SiO2 catalyst in the high-pressure reactor was researched. Study on influencial factors such as reaction temperature, reaction pressure, the concentration of sulfuric acid, amount of catalyst. The optimal conditions were as follows： reaction temperature 85 ℃, hydrogen pressure 0.4 MPa , the concentration of sulfuric acid 17%, amount of Pt/SiO2 is 5 g, product purity is reached 98%.