METHOD FOR PRODUCING AMMOXIDATION CATALYST AND METHOD FOR PRODUCING ACRYLONITRILE Russian patent published in 2021 - IPC B01J37/04 B01J23/887 B01J37/08 C07C255/08 

FIELD: ammoxidation catalyst production.

SUBSTANCE: present invention provides a method for manufacturing an ammoxidation catalyst. A method for manufacturing a catalyst for ammoxidation includes the steps of: obtaining a catalyst precursor suspension containing a liquid phase and a solid phase; drying the catalyst precursor slurry to obtain dry particles; and calcining dry particles in order to obtain a catalyst for ammoxidation, where the solid phase of the catalyst precursor slurry contains an aggregate containing a metal and a support, the primary metal particles constituting the aggregate have a particle size of 1 mcm or less, and the average particle size for primary metal particles is in the range from 40 nm or more to 200 nm or less, the support contains silicon dioxide, where the catalyst for ammoxidation contains a complex metal oxide, characterized by a composition described by the following general formula (1): Mo₁₂Bi_aFe_bX_cY_dZ_eO_f (1), where X represents 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 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 between bismuth and 12 molybdenum atoms and satisfies the inequality 0,1≤а≤2,0; b is the atomic ratio between iron and 12 molybdenum atoms and satisfies the inequality 0,1≤b≤3,0; c is the atomic ratio between X and 12 molybdenum atoms and satisfies the inequality 0,1≤c≤10,0; d is the atomic ratio between Y and 12 molybdenum atoms and satisfies the inequality 0,1≤d≤3,0; e is the atomic ratio between Z and 12 molybdenum atoms and satisfies the inequality 0,01≤e≤2,0; and f is the atomic ratio between oxygen and 12 molybdenum atoms and represents the number of oxygen atoms required to satisfy the valency requirements of the other elements present, during the step of drying the catalyst precursor slurry to obtain dry particles, the dryer is maintained at an inlet air temperature in the range from 180 to 250°C and at an outlet temperature in the range from 100 to 150°C, in the stage of calcining the dry particles in order to obtain a catalyst for ammoxidation, the calcination temperature is in the range from 550 to 650°C.

EFFECT: providing a method for the production of a catalyst for ammoxidation, which demonstrates a high yield of acrylonitrile, and a method for the production of acrylonitrile.

18 cl, 1 dwg, 1 tbl, 12 ex