US 11,701,648 B2
Method for producing catalyst for ammoxidation, and method for producing acrylonitrile
Kohei Moriya, Tokyo (JP); and Akiyoshi Fukuzawa, Tokyo (JP)
Assigned to ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 17/270,281
Filed by ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed Aug. 13, 2019, PCT No. PCT/JP2019/031835
§ 371(c)(1), (2) Date Feb. 22, 2021,
PCT Pub. No. WO2020/039998, PCT Pub. Date Feb. 27, 2020.
Claims priority of application No. 2018-156514 (JP), filed on Aug. 23, 2018.
Prior Publication US 2021/0316292 A1, Oct. 14, 2021
Int. Cl. B01J 37/00 (2006.01); B01J 37/08 (2006.01); B01J 35/00 (2006.01); B01J 35/02 (2006.01); B01J 23/887 (2006.01); B01J 21/08 (2006.01); C07C 253/26 (2006.01)
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.