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2 188 157

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IPC

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Application

2000107408/12, 2000-03-27

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Start date

2000-03-27

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Actual filing date

2000-03-27

(45)

Published

2002-08-27

(72)

Inventor

Bordunov V.V.Bordunov S.V.Sobolev I.A.Andreev G.G.Guzeeva T.I.Krasil'Nikov V.A.Levshaev A.S.

(73)

Holder

Institut Khimii Nefti So RanTomskij Politekhnicheskij UniversitetZao

METHOD OF RECOVERING THORIUM FROM AQUEOUS SOLUTIONS CONTAINING RARE-EARTH METALS Russian patent published in 2002 - IPC

Abstract RU 2188157 C2

FIELD: inorganic compounds technology. SUBSTANCE: nitric acid in aqueous solutions containing thorium and rare-earth metals is neutralized to its concentration 0.005-0.2 M, after which sodium benzenesulfinate and collector are added, the latter being represented by polyfluorinated organic acids, alcohols, aldehydes, or ketones depicted by general formula C_xF_yO_zH_s wherein x= 5-13, y=5-19, z=1-2, and s=1-4. Weight ratio of aqueous solution to collector is (5-10):1. The total is stirred and sodium benzenesulfinate is isolated from separated collector. EFFECT: increased thorium recovery selectivity. 3 tbl, 3 ex

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RU 2 188 157 C2

Authors

Bordunov V.V.

Bordunov S.V.

Sobolev I.A.

Andreev G.G.

Guzeeva T.I.

Krasil'Nikov V.A.

Levshaev A.S.

Dates

2002-08-27—Published

2000-03-27—Filed