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 ...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.展开更多
A study on separation and enrichment of p aminophenol from aqueous solution with emulsion liquid membranes has been carried out The effects of pH in internal aqueous phase, the concentration of the carrier and surfact...A study on separation and enrichment of p aminophenol from aqueous solution with emulsion liquid membranes has been carried out The effects of pH in internal aqueous phase, the concentration of the carrier and surfactant were examed Under the optimal operation conditions, the experimental results show that the water treated attained the drainage standard when the concentration of p aminophenol is 500mg·L -1 , after dealing with two stage liquid membrane展开更多
文摘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.
文摘A study on separation and enrichment of p aminophenol from aqueous solution with emulsion liquid membranes has been carried out The effects of pH in internal aqueous phase, the concentration of the carrier and surfactant were examed Under the optimal operation conditions, the experimental results show that the water treated attained the drainage standard when the concentration of p aminophenol is 500mg·L -1 , after dealing with two stage liquid membrane
