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IPC

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Application

2000100065/12, 2000-01-05

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Start date

2000-01-05

(22)

Actual filing date

2000-01-05

(45)

Published

2001-09-10

(72)

Inventor

Medvedev A.S.Molchanov S.A.Peganov V.A.Shatalov V.V.Molchanova T.V.Adosik G.M.Kursinov I.I.Mikhajlovskij V.G.Popov Ju.G.

(73)

Holder

Oao Gorno-Obogatitel'Nyj Kombinat"

METHOD OF PROCESSING TUNGSTEN-CONTAINING CONCENTRATES TO PREPARE TUNGSTIC ACID Russian patent published in 2001 - IPC

Abstract RU 2173300 C1

FIELD: preparation of pure tungsten compounds. SUBSTANCE: tungstic acid is once washed with hot distilled water at 60-70 C and with distilled water at room temperature. Sodium ions are sorbed from cation-exchange resin- based pulp in H⁺- or NH+4

form at pH of 1.1-1.2. EFFECT: greater process efficiency, increased purification from sodium and preparation of readily filterable sediments. 1 ex, 1 tbl

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RU 2 173 300 C1

Authors

Medvedev A.S.

Molchanov S.A.

Peganov V.A.

Shatalov V.V.

Molchanova T.V.

Adosik G.M.

Kursinov I.I.

Mikhajlovskij V.G.

Popov Ju.G.

Dates

2001-09-10—Published

2000-01-05—Filed