CATALYST AND CATALYST GROUP Russian patent published in 2020 - IPC B01J35/02 B01J23/887 C07C45/35 C07C45/29 C07C47/22 C07C51/215 C07C51/23 C07C57/05 

FIELD: chemistry.

SUBSTANCE: present invention relates to a catalyst and a catalyst group which are used in carrying out a gas-phase catalytic oxidation reaction of an olefin or tertiary butanol in order to obtain a corresponding unsaturated aldehyde and/or unsaturated carboxylic acid, and to catalyst and catalyst group, which are used in gas-phase reaction of catalytic oxidation of unsaturated aldehyde in order to obtain corresponding unsaturated carboxylic acid, as well as to methods of producing acrolein and/or acrylic acid. Ring-like catalyst contains at least molybdenum and bismuth or molybdenum and vanadium and has straight part of housing and hollow part of housing, where: length of straight part of body is less than length of hollow part of body, and at least at one end part area from end part of straight part of body to end part of hollow part of body has concave curvature. Catalyst group comprising 200 or more ring-shaped catalysts contains at least molybdenum and bismuth or molybdenum and vanadium, wherein said catalyst group satisfies following conditions (1), (2) and (3): (1) catalyst group contains catalyst (A), in which the body straight part length is less than the hollow part length of the body, straight part of housing is located between surface including one end part of hollow part of housing and surface including other end part of hollow part of housing, and at least at one end part the area from the end part of the body straight part to the hollow part end part of housing is linear and/or has concave curvature; (2) proportional part of number of end parts, in which area from end part of housing straight part to end part of hollow part of housing has concave curvature, relative to the total number of end parts of catalyst (A) is 40 % or more, and (3) the portion of the upper position in accordance with the sample for shaking the catalyst group is 70 % or less.

EFFECT: technical result is reduced loss of pressure, delayed coke formation and high output of target substance.

15 cl, 7 dwg, 4 tbl, 10 ex