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2 139 949

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IPC

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Application

98112801/02, 1998-07-10

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Start date

1998-07-10

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Actual filing date

1998-07-10

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Published

1999-10-20

(72)

Inventor

Arzhatkina L.A.Bogatyrev V.A.Grabko A.I.Ivanov E.N.Kosynkin V.D.Plekhov V.P.Solov'Ev V.V.Cheremnykh G.S.Shtutsa M.G.

(73)

Holder

Vserossijskij Nauchno-Issledovatel'Skij Institut Khimicheskoj TekhnologiiAo Mekhanicheskij Zavod"

METHOD OF PREPARING CERIUM OXIDE Russian patent published in 1999 - IPC

Abstract RU 2139949 C1

FIELD: inorganic syntheses. SUBSTANCE: cerium oxide for glass polishing or catalyst production is prepared by calcining rare-earth metals to form their oxides and treating the latter with acid to produce cerium dioxide and rare-earth metal solution. Treatment of rare-earth metal oxides is carried out at 70-100 C in presence of fluoride ions (2-12 g/l) to final concentration of acid in solution 0.1-1 M. EFFECT: simplified process and increased purity of product. 2 cl, 1 tbl

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RU 2 139 949 C1

Authors

Arzhatkina L.A.

Bogatyrev V.A.

Grabko A.I.

Ivanov E.N.

Kosynkin V.D.

Plekhov V.P.

Solov'Ev V.V.

Cheremnykh G.S.

Shtutsa M.G.

Dates

1999-10-20—Published

1998-07-10—Filed