Catalyst, method for producing catalyst, and method for producing acrylonitrile

An oxidation reaction catalyst comprising a support and a metal oxide supported on the support, wherein

• the support comprises silica;
• the metal oxide is represented by the following formula (1):
• wherein
• X is one or more elements selected from the group consisting of nickel, cobalt, magnesium, calcium, zinc, strontium, and barium,
• Y is one or more elements selected from the group consisting of chromium, lanthanum, neodymium, yttrium, praseodymium, samarium, aluminum, gallium, and indium,
• Z is one or more elements selected from the group consisting of potassium and cesium,
• a to h satisfy the following relationships:
• 0
• .
• 1
• ≤
• a
• ≤
• 2.
• ,
• 0.1
• ≤
• b
• ≤
• 3.
• ,
• 0.01
• ≤
• c
• ≤
• 1.
• ,
• 0
• <
• d
• ≤
• 3.
• ,
• 0
• ≤
• e
• ≤
• 1
• ⁢
• 0
• .0
• ,
• 0
• ≤
• f
• ≤
• 3.
• ,
• 0
• ≤
• g
• ≤
• 2.
• ,
• and
• 0.1
• ≤
• h
• ≤
• 0
• .
• 2
• ,
• and
• i is the number of oxygen atoms necessary for satisfying valence requirements of the other elements present;
• an amount of the support is 46.0% by mass or less based on the mass of the oxidation reaction catalyst;
• a value of a+c+d calculated from the atomic ratios described in the formula (1) is 0.21 or more and 1.82 or less;
• and
• a value of d/(a+d) calculated from the atomic ratios described in the formula (1) is more than 0.50 and 0.90 or less.