초록 ▼

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 m2/g, measured at a temperature ranging from 350°C. to 500°C., are prepared by reacting an aqueous solution of cerium (IV)

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 m2/g, measured at a temperature ranging from 350°C. to 500°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.

대표청구항 ▼

A process for the preparation of ceric oxide particulates having a B.E.T. specific surface of at least 85±5 m2/g, measured at a temperature ranging from 350°C. to 500°C., comprising reacting an aqueous solution of a cerium (IV) salt with a sulfate ion-containing solution to precipitate a basic ceriu

A process for the preparation of ceric oxide particulates having a B.E.T. specific surface of at least 85±5 m2/g, measured at a temperature ranging from 350°C. to 500°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°C. to 500°C.