	US 12,357,969 B2
	Oxide catalyst and method for producing unsaturated nitrile
Gosuke Oyama, Tokyo (JP); Yuya Oka, Tokyo (JP); Natsume Koike, Tokyo (JP); and Makoto Yoshida, Tokyo (JP)
Assigned to ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
Appl. No. 17/281,481
Filed by ASAHI KASEI KABUSHIKI KAISHA, Tokyo (JP)
PCT Filed May 25, 2020, PCT No. PCT/JP2020/020461 § 371(c)(1), (2) Date Mar. 30, 2021, PCT Pub. No. WO2020/246283, PCT Pub. Date Dec. 10, 2020.
Claims priority of application No. 2019-106015 (JP), filed on Jun. 6, 2019; and application No. 2019-106018 (JP), filed on Jun. 6, 2019.
Prior Publication US 2021/0229077 A1, Jul. 29, 2021
Int. Cl. B01J 23/30 (2006.01); B01J 21/08 (2006.01); B01J 23/00 (2006.01); C07C 253/24 (2006.01)

CPC B01J 23/30 (2013.01) [B01J 21/08 (2013.01); B01J 23/002 (2013.01); C07C 253/24 (2013.01)]

11 Claims

1. An oxide catalyst to be used for gas-phase catalytic ammoxidation reaction of propane or isobutane, the oxide catalyst comprising a composite oxide, wherein

the composite oxide comprises a catalytically active species to be isolated from the composite oxide using a hydrogen peroxide solution, and

the catalytically active species has an average composition represented by the following formula (1) in STEM-EDX measurements;

Formula:

Mo_lV_aSb_bNb_cW_dX_eO_n (1)

wherein X represents at least one selected from the group consisting of Te, Ce, Ti, and Ta; a, b, c, and d satisfy relations represented by formulae of 0.050≤a≤0.200, 0.050≤b≤0.200, 0.100≤c≤0.300, 0≤d≤0.100, 0≤e≤0.100, and a≤c; and n represents a number determined by valences of the other elements; and

wherein a mass proportion of the catalytically active species is 45% by mass or more based on a total amount of the composite oxide.