CPC B01J 37/0045 (2013.01) [B01J 21/08 (2013.01); B01J 23/8876 (2013.01); B01J 35/0026 (2013.01); B01J 35/023 (2013.01); B01J 37/088 (2013.01); C07C 253/26 (2013.01)] | 22 Claims |
1. A method for producing a catalyst for ammoxidation, comprising steps of:
preparing a catalyst precursor slurry comprising a liquid phase and a solid phase;
drying the catalyst precursor slurry to obtain a dry particle; and
calcining the dry particle to obtain a catalyst for ammoxidation,
wherein the solid phase of the catalyst precursor slurry comprises an aggregate containing a metal and a support, metal primary particles constituting the aggregate have a particle size of 1 μm or smaller, and an average particle size of the metal primary particles is 40 nm or larger and 200 nm or smaller, wherein the catalyst for ammoxidation comprises a composite metal oxide having composition represented by the following general formula (1): Mo12BiaFebXcYdZeOf (1) wherein X represents one or more elements selected from the group consisting of nickel, cobalt, magnesium, calcium, zinc, strontium, and barium; Y represents one or more elements selected from the group consisting of cerium, chromium, lanthanum, neodymium, yttrium, praseodymium, samarium, aluminum, gallium, and indium; Z represents one or more elements selected from the group consisting of potassium, rubidium and cesium; a represents the atomic ratio of bismuth to the 12 atoms of molybdenum and satisfies 0.1<a<2.0; b represents the atomic ratio of iron to the 12 atoms of molybdenum and satisfies 0.1<b<3.0; c represents the atomic ratio of X to the 12 atoms of molybdenum and satisfies 0.1<c<10.0; d represents the atomic ratio of Y to the 12 atoms of molybdenum and satisfies 0.1<d<3.0; e represents the atomic ratio of Z to the 12 atoms of molybdenum and satisfies 0.01<e<2.0; and f represents the atomic ratio of oxygen to the 12 atoms of molybdenum and is the number of atoms of oxygen necessary for satisfying valence requirements of other elements present.
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