Effect of dehydration of VOPO4·2H2O on the preparation and reactivity of vanadium phosphate catalyst for the oxidation of n-butane

F. Javier Cabello Sanchez , J A Lopez-Sanchez, Richard Peter Kerwin Wells, C Rhodes, A Z Isfahani, G Hutchings

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The effect of drying of VOPO4.2H(2)O on the preparation of vanadium phosphate catalysts for the selective oxidation of n-butane to maleic anhydride is described and discussed. It is found that partially dehydrated samples of the dihydrate containing small amounts of alpha(I)-VOPO4 are formed when the material is initially dried. The presence of this impurity leads to a final catalyst containing trace amounts of alpha(I)-VOPO4 in combination with (VO)(2)P2O7 and this combination leads to a catalyst with a higher activity but with a lower selectivity to maleic anhydride. The drying stage is also found to influence the surface area and intrinsic activity of the activated catalyst.

Original languageEnglish
Pages (from-to)189-192
Number of pages4
JournalCatalysis Letters
Issue number4
Publication statusPublished - 2001



  • vanadium phosphate preparation
  • n-butane oxidation
  • maleic anhydride
  • transformation
  • VOPO4

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