Process for the preparation of cerium oxide particulates
AssigneeRhone-Poulenc Specialties Chimiques
InventorsJean-Yves Chane-Ching, Jean-Yves Dumousseau
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Abstract
Morphologically improved cerium oxide particulates having low sulfur content, useful, e.g., as catalysts/catalyst supports, and having a B.E.T. specific surface of at least 85.+-.5 m.sup.2 /g, measured at a temperature ranging from 350.degree. C. to 500.degree. C., are prepared by reacting an aqueous solution of cerium (IV) salt with an aqueous solution of sulfate ions to precipitate a basic ceric sulfate, filtering the precipitate which results, washing and optionally drying said precipitate, and then calcining same.
Claims21
A process for the preparation of ceric oxide particulates having a B.E.T. specific surface of at least 85.+-.5 m.sup.2 /g, measured at a temperature ranging from 350.degree. C. to 500.degree. C., comprising reacting an aqueous solution of a cerium (IV) salt with a sulfate ion-containing solution to precipitate a basic cerium sulfate, filtering the precipitate of reaction which results, washing at least one with an aqueous ammonia solution and optionally drying said precipitate, and thence calcining said precipitate at a temperature ranging from 300.degree. C. to 500.degree. C.
Dependencies are inferred from the claim text.