硝基苯加氢制对氨基苯酚Pt/C催化性能研究

Study on activity of Pt/C catalyst for hydrogenation of nitrobenzene

研究硝基苯催化加氢工艺，发现Ｐｔ／Ｃ催化剂比表面积与其催化活性关系不大，控制反应速度和反应工艺条件，可得到高收率的对氨基苯酚；控制反应时间在２ｈ内可减少杂质二胺基二苯醚的生成，提高产品纯度。考察Ｈ２中Ｏ２含量的影响，发现在１０×１０－６～２０００×１０－６范围内。

Synthesis of para aminophenol(PAP)is studied by hydrogenation of nitrobenzene over a Pt/C catalyst.It is found that the activity of the catalyst has little to do with its surface area and a high yield of PAP can be obtained through controlling reaction speed and conditions. The formation of PhNH 2 and DADPE can be inhibited by shortening reaction time.The results also show that the content of O 2 in H 2 ranging from (10～2000)×10 -6 has little effect on the yield of PAP.