	US 11,717,815 B2
	Method for preparing high-efficiency denitrification activity catalyst
Xiaoling Liu, Yantai (CN); Hu Yuan, Yantai (CN); Songwei Xie, Yantai (CN); and Fanmin Meng, Yantai (CN)
Assigned to VALIANT CO., LTD., Yantai (CN)
Appl. No. 17/796,881
Filed by VALIANT CO., LTD., Yantai (CN)
PCT Filed Dec. 29, 2020, PCT No. PCT/CN2020/140493 § 371(c)(1), (2) Date Aug. 2, 2022, PCT Pub. No. WO2022/134137, PCT Pub. Date Jun. 30, 2022.
Claims priority of application No. 202011517634.6 (CN), filed on Dec. 21, 2020.
Prior Publication US 2023/0067077 A1, Mar. 2, 2023
Int. Cl. B01J 37/08 (2006.01); B01J 35/04 (2006.01)

CPC B01J 37/08 (2013.01) [B01J 35/04 (2013.01); B01J 2523/3712 (2013.01); B01J 2523/47 (2013.01); B01J 2523/55 (2013.01); B01J 2523/68 (2013.01); B01J 2523/69 (2013.01); B01J 2523/72 (2013.01); B01J 2523/845 (2013.01); B01J 2523/847 (2013.01)]

3 Claims

1. A method for preparing an active catalyst for high-efficiency denitration, comprising:

charging a catalyst product into a denitration reactor,

introducing NH₃and an inert gas into the denitration reactor,

heating the denitration reactor,

holding a temperature of the denitration reactor, and

cooling the denitration reactor naturally to obtain the active catalyst;

wherein an active component of the catalyst product is selected from one or more oxides of Mo, W, Fe, Co, Ni, Cu, Nb, Sn, or La, and a support is selected from one or more of titanium silicon powder, titanium tungsten powder, titanium tungsten silicon powder, silicon dioxide or aluminum oxide;

wherein the inert gas is one of nitrogen or argon; and

wherein the temperature is 300° C.-550° C., and a time of holding the temperature of the denitration reactor is 2 h-10 h.