| abstract |
The present invention, (a) a carrier, (b) (i) catalytic activity, molybdenum and containing at least one other metal, the general formula (I) Mo 12 Bi a Cr b X 1 c Fe d X 2 e X 3 f O y (I) [wherein X 1 = Co and / or Ni, X 2 = Si and / or Al, X 3 = Li, Na, K, Cs and / or Rb, 0.2 ≦ a ≦ 1, 0 ≦ b ≦ 2, 2 ≦ cV10, 0.5 ≦ d ≦ 10, 0 ≦ e ≦ 10, 0 ≦ f ≦ 0.5 and y = assuming that the charge is neutral (I A shell obtained from a catalyst precursor, comprising: a multimetal oxide of a number determined by the valency and frequency of an element different from oxygen in] and a shell containing (ii) at least one pore former Relates to the catalyst. |