US 12,458,958 B2
Composition for SCR catalysts
Matthias Peter, Hannover (DE); Claudia Zabel, Hannover (DE); Maria Heenemann, Hannover (DE); Wen-Mei Xue, Iselin, NJ (US); Eunseok Kim, Siheung-si (KR); Narayana K Rao, Sihenug-si (KR); and David Pollick, Iselin, NJ (US)
Assigned to BASF Mobile Emissions Catalysts LLC, Iselin, NJ (US); and Heesung Catalysts Corporation, Seoul (KR)
Appl. No. 17/996,978
Filed by BASF MOBILE EMISSIONS CATALYSTS LLC, Iselin, NJ (US); and HEESUNG CATALYSTS CORPORATION, Seoul (KR)
PCT Filed Apr. 27, 2021, PCT No. PCT/EP2021/060968
§ 371(c)(1), (2) Date Oct. 24, 2022,
PCT Pub. No. WO2021/219628, PCT Pub. Date Nov. 4, 2021.
Claims priority of application No. 20171795 (EP), filed on Apr. 28, 2020.
Prior Publication US 2023/0191376 A1, Jun. 22, 2023
Int. Cl. B01J 29/56 (2006.01); B01D 53/94 (2006.01); B01J 21/04 (2006.01); B01J 35/30 (2024.01); B01J 35/77 (2024.01); B01J 37/02 (2006.01); F01N 3/20 (2006.01)
CPC B01J 29/56 (2013.01) [B01D 53/94 (2013.01); B01J 21/04 (2013.01); B01J 37/0225 (2013.01); F01N 3/2073 (2013.01); B01J 35/30 (2024.01); B01J 35/77 (2024.01); B01J 2235/10 (2024.01); B01J 2235/30 (2024.01)] 17 Claims
OG exemplary drawing
 
1. A composition comprising:
(i) a non-zeolitic oxidic material comprising alumina; and
(ii) an 8-membered ring pore zeolitic material comprising one or more of copper and iron, wherein a framework structure of the zeolitic material comprises a tetravalent element Y, a trivalent element X and oxygen, wherein the molar ratio of Y:X, calculated as YO2:X2O3, ranges from 2:1 to 40:1;
wherein at least part of the outer surface of the zeolitic material according to (ii) is covered by a layer comprising the non-zeolitic oxidic material according to (i); and
wherein Y comprises one or more of Si, Sn, Ti, Zr and Ge and X comprises one or more of Al, B, In and Ga;
wherein the composition is obtainable or obtained by a process, the process comprising:
(a) providing an 8-membered ring pore zeolitic material, comprising one or more of copper and iron, wherein the framework structure of the zeolitic material comprises a tetravalent element Y, a trivalent element X and oxygen, wherein the molar ratio of Y:X, calculated as YO2:X2O3, is in the range of from 2:1 to 40:1;
(b) providing a source of a non-zeolitic oxidic material comprising alumina, wherein the source of the non-zeolitic oxidic material is a colloid dispersion comprising particles of the non-zeolitic oxidic material, wherein the particles of the non-zeolitic oxidic material have a Dv50 in the range of from 30 to 200 nm;
(c) admixing the zeolitic material obtained in (a) with the source of the non-zeolitic oxidic material comprising alumina obtained in (b), forming a mixture;
(d) calcining the mixture obtained in (c) in a gas atmosphere having a temperature in the range of from 400 to 800° C.