硝基苯选择加氢制对氨基苯酚的研究(Ⅱ)——以Pd/Al_2O_3作催化剂的合成方法

SELECTIVE CATALYTIC HYDROGENATION OF NITROBENZENE TO p - AMINOPHENOL BY Pd/AI_2O_3

本文研究了以Pd/Al_2O_3为催化剂,在酸性介质中硝基苯选择催化合成对氨基苯酚的反应。添加DMSO可明显提高反应选择性。在选定较佳条件下,硝基苯转化率为56.0％,对氨基苯酚选择性为55.6％。

The selective catalytic hydrogenation of nitrobenzene to p - aminophenol was investigated on Pd/Al2O3. Addition of DMSO could improve the selectivity of p - aminophenol significantly. Under the reaction condition which was determined, after 4 hours, 56. 0% of nitrobenzene was reacted and the yield of p -aminophenol was 55. 6%,without DMSO approximate 70% and 30% respectively.