Pt/C催化剂催化邻硝基苯甲醚加氢制备邻氨基苯甲醚

The Preparation of o-Aminoanisole by Hydrogenation of o-Nitroanisole with Pt/C Catalyst

以邻硝基苯甲醚为原料,采用Pt/C催化剂,通过液相催化加氢工艺合成邻氨基苯甲醚,研究不同反应条件对其转化率和选择性的影响,确定最佳工艺条件为,无水乙醇作溶剂、反应温度80℃、反应压力2 MPa、Pt/C催化剂用量0.01 g和反应时间2 h。相比传统硫化钠法和铁粉盐酸法等,催化加氢还原工艺可有效解决废水污染问题,提高产品收率和品质,降低生产成本,同时更易实现自动化生产,属于绿色新型工艺,具有良好的工业化前景。

Using o-nitroanisole as raw material,o-aminoanisole was synthesized by liquid phase catalytic hydrogenation process with Pt/C catalyst.The effects of different reaction conditions on its conversion rate and selectivity were studied.The optimal process conditions were determined to use anhydrous ethanol as the solvent at a reaction temperature of 80℃,the reaction pressure of 2MPa,the Pt/C catalyst dosage of 0.01 g,and the reaction time of 2 h.Compared with the traditional sodium sulfide process and iron powder hydrochloric acid process,catalytic hydrogenation reduction process can effectively solve the problem of wastewater pollution,improve product yield and quality,reduce production costs,and easier to achieve automated production,which is a new green process with good industrialization prospects.