CATALYST USED IN VAPOR-PHASE CONTACT AMMOXIDATION REACTION, METHOD FOR PRODUCING SAID CATALYST, AND METHOD FOR PRODUCING UNSATURATED ACID OR UNSATURATED NITRILE

WIPO Patent Application WO/2024/024973

A1

A method for producing a catalyst that is used in a vapor-phase contact ammoxidation reaction, wherein: the catalyst is such that a metal oxide containing at least Mo and Sb is carried on a silica support; the method includes a sintering step in which a catalyst precursor is sintered at 500-800°C inclusive to obtain a catalyst sintered body having a catalyst surface body, and a surface treatment step in which the catalyst sintered body is fluidized inside a fluidizing device to thereby remove the catalyst sintered body and obtain a catalyst; a vertical-direction cross-section of the fluidizing device has a portion that gradually declines downward; and, in the surface treatment step, treatment is carried out such that the value of U calculated according to formula (1) pertaining to the catalyst is within the range of 89-118. Formula (1): U = (b + 2.94 − a)/2.94 × 100 (In formula (1), a represents the UV absorption intensity at 250 nm, and b represents the UV absorption intensity at 410 nm.)

KAWAMURA SHOGO (JP)
SUGANAMI HIKARU (JP)
ENDO SATOSHI (JP)
KOIKE NATSUME (JP)

PCT/JP2023/027865

February 01, 2024

July 28, 2023

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ASAHI CHEMICAL IND (JP)

B01J23/30; B01J37/04; C07B61/00; C07C253/24; C07C255/08

WO2011136217A1	2011-11-03
WO2018025774A1	2018-02-08
WO2019008924A1	2019-01-10

JP2018199823A

2018-12-20

INABA, Yoshiyuki et al. (JP)

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