Patent ID: 11964255
Assignee: RHODIA OPERATIONS
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  F | IPC B  F

Claim 0:
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 (Tmax) of at most 530° C.