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2 209 771

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IPC

(21) (22)

Application

2001127607/12, 2001-10-10

(24)

Start date

2001-10-10

(22)

Actual filing date

2001-10-10

(45)

Published

2003-08-10

(72)

Inventor

Marinenko E.P.Rudnikov A.I.Krupin A.G.Kuz'Minykh S.A.Lazarchuk V.V.Komissarov A.A.Khokhlov V.A.

(73)

Holder

Federal'Noe Gosudarstvennoe Unitarnoe Predprijatie Khimicheskij Kombinat"

METHOD FOR PREPARING TUNGSTEN HEXAFLUORIDE Russian patent published in 2003 - IPC

Abstract RU 2209771 C2

FIELD: inorganic chemistry, chemical technology. SUBSTANCE: invention relates to technology for preparing tungsten hexafluoride from metallic tungsten and can be used in regeneration of tungsten from tungsten scrap. Metallic tungsten is fluorinated with elemental fluorine at elevated temperature. Process is carried out at the linear fluorine rate feeding in the reaction zone 0.1-0.5 cm/s up to residual tungsten content, as %, that at least equal to 50-fold value of linear fluorine rate feeding measured as cm/s. Method provides 99.9% utilization of fluorine. EFFECT: improved preparing method. 1 tbl

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RU 2 209 771 C2

Authors

Marinenko E.P.

Rudnikov A.I.

Krupin A.G.

Kuz'Minykh S.A.

Lazarchuk V.V.

Komissarov A.A.

Khokhlov V.A.

Dates

2003-08-10—Published

2001-10-10—Filed