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2 048 559

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Application

93029836/02, 1993-06-15

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Actual filing date

1993-06-15

(45)

Published

1995-11-20

(72)

Inventor

Mel'Nichenko E.I.Ehpov D.G.Gordienko P.S.Shkol'Nik Eh.L.Nagorskij L.V.Kozlenko I.A.Buznik V.M.

(73)

Holder

Institut Khimii Dal'Nevostochnogo Otdelenija RanSovmestnoe Rossijsko-Japonskoe Predprijatie

METHOD FOR PROCESSING OF ZIRCONIUM CONCENTRATE Russian patent published in 1995 - IPC

Abstract RU 2048559 C1

FIELD: production of high-purity zirconium compounds by halogenation of zirconium concentrate. SUBSTANCE: method for processing of zirconium concentrate includes fluorination of zirconium concentrate with subsequent desiliconization of fluorinated product in air-free atmosphere or in inert atmosphere at temperature of 330-650 C, heating of desiliconized product in air-free or in inert atmosphere at 900-1000 C for 4-5 h. Zirconium tetrafluoride is separated by condensation at temperature of 250-850 C from which silicon dioxide is obtained by pyrohydrolysis. Method provides for production of commercial by-product silica white. EFFECT: higher efficiency. 3 cl, 2 dwg

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RU 2 048 559 C1

Authors

Mel'Nichenko E.I.

Ehpov D.G.

Gordienko P.S.

Shkol'Nik Eh.L.

Nagorskij L.V.

Kozlenko I.A.

Buznik V.M.

Dates

1995-11-20—Published

1993-06-15—Filed

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