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2 245 304

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IPC

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Application

2003118340/15, 2003-06-17

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Start date

2003-06-17

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Actual filing date

2003-06-17

(45)

Published

2005-01-27

(72)

Inventor

Gromov O.G.Kunshina G.B.Kuz'Min A.P.Lokshin Eh.P.Ivanenko V.I.Kalinnikov V.T.

(73)

Holder

Institut Khimii I Tekhnologii Redkikh Ehlementov I Mineral'Nogo Syr'Ja Im. I.V. Tananaeva Kol'Skogo Nauchnogo Tsentra Rossijskoj Akademii Nauk

METHOD FOR PRODUCTION OF ALKALI METHAMETALLATE (V) Russian patent published in 2005 - IPC

Abstract RU 2245304 C1

FIELD: production of ABO₃-type methametallate (V) for laser, electrooptical, ferroelectric materials and special ceramics.

SUBSTANCE: fresh deposited metal (V) hydroxide (e.g. niobium, tantalum or mixture thereof) is brought into reaction with lithium or sodium hydroxide or mixture thereof at stoichiometric ratio in hydrogen peroxide with reagent agitation. Used hydrogen peroxide has concentration not less than 35 mass % and is cooled up to 0⁰C to provide total component dissolution. Lithium hydroxide is used in solid form and has formula LiOH·H₂O. Sodium hydroxide is used in form of aqueous solution with concentration of 15.5-19.0 M. Precipitate is isolated by evaporation of obtained peroxide solution and baked at <730⁰C.

EFFECT: absence of side products, finished products with increased assortment.

7 cl, 8 ex

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RU 2 245 304 C1

Authors

Gromov O.G.

Kunshina G.B.

Kuz'Min A.P.

Lokshin Eh.P.

Ivanenko V.I.

Kalinnikov V.T.

Dates

2005-01-27—Published

2003-06-17—Filed