| 摘要 |
The invention relates to a coated catalyst, which is obtainable from a catalyst precursor comprising (a) a support body, (b) a coating comprising (i) a catalytically active, multimetal oxide which comprises molybdenum and at least one further metal and is of the general formula (I) Mo12BiaCrbX1cFedX2eX3fOy  (I) where X1=Co and/or Ni, X2=Si and/or Al, X3=Li, Na, K, Cs and/or Rb, 0.2≦̸a≦̸1, 0≦̸b≦̸2, 2≦̸c≦̸10, 0.5≦̸d≦̸10, 0≦̸e≦̸10, 0≦̸f≦̸0.5 and y=a number which, with the prerequisite of charge neutrality, is determined by the valency and frequency of the elements in (I) other than oxygen, and (ii) at least one pore former. |
