LI Gui-xian¹ , WANG Li-xin^1,2, GAOYun-yan¹ , TENG Zhi-jun^1,2 , ZHANG Xue-mei¹,

(1College of Petrochemical Engineering of Lanzhou University of Technology, Lanzhou 730050, China; 2 Gansu Yinguang Juyin Chemical Limited Company, Baiyin 730900, China)

Abstract: A series of molybdovanadophosphoric cobalt heteropoly compounds withDawson type are synthesized and characterized by Fourier transform infrared spectroscopy (FT-IR). The catalytic activity of the molybdovanadophosphoric cobalt heteropoly compounds for theoxidationof ethylbenzene to acetophenone with H₂O₂ and the effects of reaction conditions were studied. The results show that the conversion of ethylbenzenewas 81.1% and the yield of acetophenone was 53.4% under the suitable reaction conditions of the amount of ethylbenzene 25mmol, Co₄HP₂Mo₁₅V₃O₆₂ catalyst 0.05mmol, acetic 20ml, n(C₆H₆)/n(H₂O₂)=0.125, n(Br^-)/n(Co²⁺)=25, reaction time 1h, the temperature 80 ℃.

Key words: cobalt ; ethylbenzene; heteropoly compounds; hydrogen peroxide

E-mail: lgxgd@lut.cn

Journal of Molecular Catalysis, Vol. 25, Issue 1, 2011, 24~29.