| abstract |
A catalyst complex useful for the partial oxidation of alkanes to the corresponding anhydrides, e. g., converting normal C 4 hydrocarbons to maleic anhydride in vapor phase, comprising as components vanadium, phosphorus, oxygen, Nb, Cu, Mo, Ni, Co and Cr. Preferred are those compositions containing in additiion one or more of Ce, Nd, Ba, Hf, U, Ru, Re, Li or Mg. |