| abstract |
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing a catalyst and a method of producing acrylonitrile. Described is a method of producing an ammoxidation catalyst, wherein the catalyst comprises: a metal oxide having a total composition represented by formula (1) below; and silica: MoBiFeXYZO(1), where X is at least one element selected from the group consisting of nickel, cobalt, magnesium, calcium, zinc, strontium and barium; Y is at least one element selected from a group consisting of cerium, chromium, lanthanum, neodymium, yttrium, praseodymium, samarium, aluminum, gallium and indium; Z is at least one element selected from a group consisting of potassium, rubidium and cesium; a, b, c, d, e and f denote atomic fraction of each element and satisfy conditions 0.1≤a≤3.0, 0.1≤b≤3.0, 0.1≤c≤10.0, 0.1≤d≤3.0 and 0.01≤e≤2.0, respectively, and f is the number of oxygen atoms required to satisfy the requirements of atomic valences of other elements present in formula (1), wherein the method includes: a step of preparing a precursor suspension containing molybdenum, bismuth, iron, silica and carboxylic acid; spray drying the precursor suspension to obtain dry particles; and a step for burning dried particles, where the preparation step includes: step (I) mixing the starting material of silica with a carboxylic acid and thereby obtaining a mixed liquid of silica-carboxylic acid; and stage (II) of mixing said mixed liquid of silica-carboxylic acid, molybdenum, bismuth and iron. Described also is an ammoxidation catalyst obtained using the method described above. Methods of producing acrylonitrile include a step for preparing an ammoxidation catalyst using the method described above and a reaction step for reacting propylene, molecular oxygen and ammonia in the presence of said catalyst.EFFECT: method of producing a catalyst which provides high output of acrylonitrile.11 cl, 2 dwg, 4 tbl, 40 ex |