	US 12,458,924 B2
	Low-temperature denitration catalyst
Zongli Xie, Wheelers Hill (AU); Choon Chian Ng, Carnegie (AU); and Yuliang Li, Hebei (CN)
Assigned to Commonwealth Scientific and Industrial Research Organisation, Action (AU)
Appl. No. 17/640,581
Filed by COMMONWEALTH SCIENTIFIC AND INDUSTRIAL RESEARCH ORGANISATION, Acton (AU)
PCT Filed Sep. 4, 2020, PCT No. PCT/CN2020/113505 § 371(c)(1), (2) Date Mar. 4, 2022, PCT Pub. No. WO2021/043267, PCT Pub. Date Mar. 11, 2021.
Claims priority of application No. 201910833100.5 (CN), filed on Sep. 4, 2019; and application No. 201910833907.9 (CN), filed on Sep. 4, 2019.
Prior Publication US 2022/0323904 A1, Oct. 13, 2022
Int. Cl. B01J 27/25 (2006.01); B01D 53/86 (2006.01); B01J 33/00 (2006.01); B01J 37/00 (2006.01); B01J 37/03 (2006.01); B01J 37/08 (2006.01)

CPC B01D 53/8628 (2013.01) [B01J 27/25 (2013.01); B01J 33/00 (2013.01); B01J 37/0009 (2013.01); B01J 37/031 (2013.01); B01J 37/08 (2013.01); B01D 2257/404 (2013.01); B01D 2258/0283 (2013.01); B01J 2523/72 (2013.01); B01J 2523/842 (2013.01)]

11 Claims

1. A process for preparing a denitration catalyst, comprising:

(a) preparing an aqueous mixed-metal nitrate solution consisting of a manganese nitrate, an iron nitrate and an alkaline precipitant which are continuously fed into a sonication-assisted co-precipitation reactor, to form a mixed-metal hydroxide salt precipitate in the form of a slurry collected from the reactor; and

(b) calcining the mixed-metal hydroxide salt precipitate to form the denitration catalyst, wherein the grain size of the denitration catalyst is less than about 0.5 μm;

wherein step (a) is sonication-assisted co-precipitation to form the mixed-metal hydroxide salt precipitate.