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US 11,028,288 B2Granted
Liquid suspension of cerium oxide particles
AssigneeRhodia Operations
InventorsEisaku Suda, Manabu Yuasa, Takao Sekimoto
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Abstract
The present invention relates to a suspension of cerium oxide particles in a liquid phase, in which said particles comprise secondary particles comprising primary particles, and a process for preparing said liquid suspension in which the cerium IV/total cerium molar ratio before precipitation is comprised between 1/10000 and 1/500000 and that the thermal treatment is being carried out under an inert atmosphere.
Claims5
A process for preparing a cerium oxide suspension, the process comprising:
- (a) treating a solution comprising at least a cerium III salt, a cerium IV salt and a base, under an inert atmosphere, to form a precipitate in solution;
- wherein the cerium IV/total cerium molar ratio before precipitation is between 1/10000 and 1/500000;
- (b) thermally treating the precipitate in solution under an inert atmosphere to form a thermally treated medium, wherein at least one of steps (a) or (b) is carried out in the presence of nitrate ions;
- and
- (c) acidifying and washing the thermally treated medium, whereby the suspension is obtained.
2 more elements
Dependencies are inferred from the claim text.