Novel 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 catalyst/catalyst supports, and having a B.E.T. specific surface of at least 130 m.sup.2 /g measured at a temperature ranging from 400.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 thence calcining same.
Claims7
A ceric oxide composition comprising ceric oxide particulates, said particulates consisting essentially of ceric oxide, said particulates having a B.E.T. specific surface of at least 130 m.sup.2 /g, measured at a temperature ranging from 400.degree. C. to 500.degree. C. and said particulates having a content in residual sulfate ions, expressed as the molar ratio [SO.sub.4.sup.= ]/]Ce.sup.IV ], of less than 0.03.
Ceric oxide particulates consisting essentially of ceric oxide and having a B.E.T. specific surface of at least 130 m.sup.2 /g, measured at a temperature ranging from 400.degree. to 500.degree. C.
Dependencies are inferred from the claim text.