改性γ-Al_2O_3担载Pt催化剂用于硝基苯加氢制对氨基苯酚  

Synthesis of p-Aminophenol from Hydrogenation of Nitrobenzene over Pt Catalyst Supported on Modified γ-Al_2O_3

作　　者：王公应[1] 刘竹青[1] 胡爱琳[1] 

机构地区：[1]中国科学院成都有机化学研究所,成都610041

出　　处：《催化学报》2000年第5期428-430,共3页

基　　金：四川省青年科技基金!(1997 1999)

摘　　要：Pt/ γ Al 2O 3 M (M=La 2O 3, Y 2O 3, CeO 2 and TiO 2) catalysts with Pt content of 1% were prepared and used for synthesis of p aminophenol (PAP) from catalytic hydrogenation of nitrobenzene. It is found that the PAP yield over the unmodified Pt/ γ Al 2O 3 is 69 68% and the PAP yield over the Pt/ γ Al 2O 3 M catalysts modified with La 2O 3, Y 2O 3, CeO 2 and TiO 2 is increased to 81 06%, 77 47%, 79 82% and 83 34%, respectively. Pt/ γ Al 2O 3 TiO 2 M (M=La 2O 3, Y 2O 3, CeO 2) catalysts modified simultaneously by rare earth metal and TiO 2 were also prepared. The yield of PAP over these catalysts is higher than that over Pt/ γ Al 2O 3 but lower than that over Pt/ γ Al 2O 3 TiO 2 catalyst. The effects of different reductants on the catalytic properties of Pt/ γ Al 2O 3 TiO 2 were studied. The results show that hydrazine is the better reductant than H 2.Pt/ γ Al 2O 3 M (M=La 2O 3, Y 2O 3, CeO 2 and TiO 2) catalysts with Pt content of 1% were prepared and used for synthesis of p aminophenol (PAP) from catalytic hydrogenation of nitrobenzene. It is found that the PAP yield over the unmodified Pt/ γ Al 2O 3 is 69 68% and the PAP yield over the Pt/ γ Al 2O 3 M catalysts modified with La 2O 3, Y 2O 3, CeO 2 and TiO 2 is increased to 81 06%, 77 47%, 79 82% and 83 34%, respectively. Pt/ γ Al 2O 3 TiO 2 M (M=La 2O 3, Y 2O 3, CeO 2) catalysts modified simultaneously by rare earth metal and TiO 2 were also prepared. The yield of PAP over these catalysts is higher than that over Pt/ γ Al 2O 3 but lower than that over Pt/ γ Al 2O 3 TiO 2 catalyst. The effects of different reductants on the catalytic properties of Pt/ γ Al 2O 3 TiO 2 were studied. The results show that hydrazine is the better reductant than H 2.

关 键 词：氧化铝 铂 催化剂 硝基苯 加氢 对氨基苯酚 

分 类 号：O643.3[理学—物理化学]