Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (02): 242-246.doi: 10.3866/PKU.WHXB20090208

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Vapour Phase ortho-Selective Alkylation of Phenol with Methanol over Fe-Zr Oxide Catalysts

XU Lei; WU Shu-Jie; ZHANG Wen-Xiang; JIA Ming-Jun; LIU Gang   

  1. College of Chemistry, Jilin University, Changchun 130021, P. R. China
  • Received:2008-08-25 Revised:2008-11-04 Published:2009-01-16
  • Contact: LIU Gang

Abstract: Fe-Zr oxides with different Zr/Fe molar ratios were prepared by a co-precipitation method and used as catalysts for the vapor phase ortho-selective alkylation of phenol with methanol. Results showed that the Fe-Zr oxide catalysts had relatively high activity and ortho-selectivity. Among them, the sample with nZr/nFe=0.5/100 exhibited the highest activity (99.2% phenol conversion) with a selectivity of 22.6% to o-cresol and 77.0% to 2,6-xylenol. An increase in reaction temperature could further improve selectivity for 2,6-xylenol. The presence of relatively strong acid-base sites may be responsible for the high phenol conversion and the high 2,6-xylenol selectivity.

Key words: Phenol, Methanol, ortho-Selective alkylation, o-Cresol, 2,6-Xylenol


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