金属氧化物触媒及其制造方法与其制造装置

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Provided is a metal oxide catalyst that has a bulk composition represented by formula (1) and that is for producing conjugated diolefins by oxidation-dehydrogenation reaction between mono-olefins including at least 4 carbon atoms and molecular oxygen, wherein the standard deviation of the quotient obtained by dividing the ratio of Bi molarity to Mo molarity of the surface of the catalyst particle by the ratio of Bi molarity to Mo molarity of the catalyst bulk is not more than 0.3. Mo12BipFeqAaBbCcDdEeFfOx (1) (In the formula : A is selected from Ni and C; B is an alkali metal element; C is any one of Mg, Ca, Sr, Ba, Zn, or Mn; D is a rare earth element, E is any one of Cr, In, or Ga; F is any one of Si, Al, Ti, or Zr; O is oxygen; 0.1 ≤ p ≤ 5; 0.5 ≤ q ≤ 8; 0 ≤ a ≤ 10; 0.02 ≤ b ≤ 2; 0 ≤ c ≤ 5; 0 ≤ d ≤ 5; 0 ≤ e ≤ 5; 0 ≤ f ≤ 200; and x is the number of oxygen atoms that satisfies the overall valence requirement.).