	US 11,964,255 B2
	Mixed oxide with improved reducibility
Simon Ifrah, La Jarrie (FR); Laure Jeanne Simone Bisson, Paris (FR); Benjamin Faure, La Rochelle (FR); Rui Miguel Jorge Coelho Marques, Shangai (CN); Wei Li, Shanghai (CN); and Ling Zhu, Licheng Town Liyang (CN)
Assigned to RHODIA OPERATIONS, Aubervilliers (FR)
Appl. No. 17/278,374
Filed by RHODIA OPERATIONS, Aubervilliers (FR)
PCT Filed Sep. 23, 2019, PCT No. PCT/CN2019/107202 § 371(c)(1), (2) Date Mar. 22, 2021, PCT Pub. No. WO2020/063510, PCT Pub. Date Apr. 2, 2020.
Claims priority of application No. PCT/CN2018/107177 (WO), filed on Sep. 24, 2018.
Prior Publication US 2021/0354111 A1, Nov. 18, 2021
Int. Cl. B01J 21/04 (2006.01); B01J 6/00 (2006.01); B01J 21/06 (2006.01); B01J 21/08 (2006.01); B01J 21/12 (2006.01); B01J 21/16 (2006.01); B01J 23/10 (2006.01); B01J 23/46 (2006.01); B01J 23/745 (2006.01); B01J 23/83 (2006.01); B01J 23/89 (2006.01); B01J 35/00 (2006.01); B01J 35/10 (2006.01); B01J 37/02 (2006.01); F01N 3/08 (2006.01); F01N 3/10 (2006.01)

CPC B01J 21/066 (2013.01) [B01J 6/001 (2013.01); B01J 23/464 (2013.01); B01J 23/83 (2013.01); B01J 35/002 (2013.01); B01J 35/1014 (2013.01); B01J 37/0201 (2013.01); F01N 3/0835 (2013.01); F01N 3/0842 (2013.01); F01N 3/101 (2013.01)]

21 Claims

1. A mixed oxide comprising zirconium, cerium, lanthanum, iron, and optionally at least one rare-earth element other than cerium and lanthanum (RE), the mixed oxide having the composition:

between 18.0 wt % and 45.0 wt % of cerium;

between 1.0 wt % and 15.0 wt % of lanthanum;

up to 15.0 wt % of the rare-earth element(s) (RE(s)) other than cerium and lanthanum;

between 0.05 wt % and 0.25 wt % of iron;

the remainder as zirconium;

these proportions being given by weight of oxide relative to the mixed oxide as a whole, the mixed oxide exhibiting the following properties after calcination in air at 1100° C. for 4 hours:

a BET specific surface area of at least 25 m²/g;

a maximum reducibility temperature (T_max) of at most 530° C.