将铁、钴或镍促进的Ag/SiO_2催化剂用于苯胺和1,2-丙二醇气相催化合成3-甲基吲哚的反应中,并采用X射线衍射、H2-程序升温还原和热重分析等技术对催化剂进行了表征.结果表明,铁或镍助剂的加入有助于提高Ag/SiO_2催化剂的选择性.其中,铁的加入能增强活性组分银与载体间相互作用,大大促进了银在载体表面上的分散,使催化剂的初活件显著提高.而钴或镍的加入虽然能略微减少反应过程中Ag/SiO_2催化剂表面的积炭,但加剧了银在反应过程中的烧结,导致催化剂稳定性下降.
Fe,Co.,or Ni as a promoter was added into the Ag/SiO_2 catalyst for the vapor-phase synthesis of 3-methylindole from aniline and 1,2-propanediol.The promoted Ag/SiO_2 catalysts were characterized by x-ray diffraction.,H2 temperature-programmed reduction,and thermogravimetry.The results indicated that the addition of Fe or Ni to Ag/SiO_2 Was favorable for the increase of the catalyst selectivity.Among them,Fe could reinforce the interaction between the silver active component and the support and greatly promote the dispersion of silver particles on the support,which resulted in the remarkable increase in the initial activity of the catalyst.Adding Co or Ni to Ag/SiO_2 promoted the sintering of silver during the reaction although it reduced the coking a little.As a result.the stability of the catalysts decreased.
参考文献
| [1] | Kaplanclkl Z A;Turan-Zitouni G;(O)zdemir A;Revial G .[J].EurJMed Chem,2008,43:155. |
| [2] | Aggarwal BB;Shishodia S .Molecular targets of dietary agents for prevention and therapy of cancer.[J].Biochemical Pharmacology,2006(10):1397-1421. |
| [3] | Matsumoto K;Yamamoto LT;Watanabe K;Yano S;Shan J;Pang PKT;Ponglux D;Takayama H;Horie S .Inhibitory effect of mitragynine, an analgesic alkaloid from Thai herbal medicine, on neurogenic contraction of the vas deferens[J].Life sciences,2005(2):187-194. |
| [4] | Alper KR;Lotsof HS;Kaplan CD .The ibogaine medical subculture.[J].Journal of Ethnopharmacology: An Interdisciplinary Journal Devoted to Bioscientific Research on Indigenous Drugs,2008(1):9-24. |
| [5] | Khaled K F .[J].Materials Chemistry and Physics,2008,112:290. |
| [6] | 章思规.精细有机化学品技术手册[M].北京:科学出版社,1992:1297. |
| [7] | Jacqueline I K.Encyclopedia of Chemical Technology[M].New York:Wiley-Interscience,1995:16l. |
| [8] | Siwach P;Singh S;Gupta R K .[J].CATALYSIS COMMUNICATIONS,2009,10:1577. |
| [9] | Jensen T;Pedersen H;Bang-Andersen B;Madsen R Jorgensen M .[J].Angewandte Chemie International Edition,2008,47:888. |
| [10] | Simoneau C A;Strohl A M;Ganem B .[J].Tetrahedron Letters,2007,48:1809. |
| [11] | Magnus P;Mitchell lan S .[J].Tetrahedron Letters,1998,39:4595. |
| [12] | Robinson B .[J].Chemical Reviews,1963,63:373. |
| [13] | Cho C S;Kim J H;Kim T J;Shim S C .[J].Tetrahedron,2001,57:3321. |
| [14] | Gopal D V;Srinivas B;Durgakumari V;Subrahmanyam M .[J].Applied Catalysis,2002,224:121. |
| [15] | Campanati M;Franceschini S;Piccolo O;Vaccari A .Reaction pathway in the vapour-phase synthesis of indole and alkylindoles[J].Journal of Catalysis,2005(1):1-9. |
| [16] | 郑佳聪,刘静,谭伟,石雷,孙琪.Ag/SiO2催化剂上气相合成 3-甲基吲哚[J].催化学报,2008(12):1199-1201. |
| [17] | Haider MA;Gogate MR;Davis RJ .Fe-promotion of supported Rh catalysts for direct conversion of syngas to ethanol[J].Journal of Catalysis,2009(1):9-16. |
| [18] | Carriazo J G;Centeno M A;Odfiozola J A;Moreno S Molina R .[J].Applied Catalysis,2007,317:120. |
| [19] | Lauritsen J V;Kibsgaard J;Olesen G H;Moses P G,Hinnemann B,Helveg S,Norskov J K,Clausen B S,Topsoe H.Laegsgaard E,Besenbacher F .[J].d Catal,2007,249:220. |
| [20] | Egorova M;Prins R .[J].d Catal,2006,241:162. |
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