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Application

2001130838/12, 2001-11-13

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Start date

2001-11-13

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Actual filing date

2001-11-13

(45)

Published

2003-11-10

(72)

Inventor

Iz'Jurova N.S.Krupin A.G.Kuz'Minykh S.A.Makaseev A.Ju.Marinenko E.P.Lazarchuk V.V.Rudnikov A.I.Khokhlov V.A.

(73)

Holder

Federal'Noe Gosudarstvennoe Unitarnoe Predprijatie Khimicheskij Kombinat"

METHOD FOR EXTRACTION OF BORON TRIFLUORIDE FROM GASEOUS MIXTURES Russian patent published in 2003 - IPC

Abstract RU 2215688 C2

FIELD: chemical industry, chemical technology. SUBSTANCE: mixture of gases containing BF₃, F₂ and HF is subjected for contact with CaF₂ at 373- 523 K to yield fluoroborate complex CaF₂•BF₃. and unreacted F₂ and HF are removed from sorption column. After saturation of sorbent desorption of BF₃ is carried out at 623-773 K. Regenerated CaF₂ is used in repeated cycles of extraction of BF₃. Trapping degree of BF₃ is 90%, not less, residual content of boron in sorbent is 0.05-0.1 wt.-%. Invention can be used for separation of boron isotopes. Invention provides exclusion of equipment corrosion and sorbent melting. EFFECT: simplified method, enhanced economy. 1 dwg, 1 ex

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RU 2 215 688 C2

Authors

Iz'Jurova N.S.

Krupin A.G.

Kuz'Minykh S.A.

Makaseev A.Ju.

Marinenko E.P.

Lazarchuk V.V.

Rudnikov A.I.

Khokhlov V.A.

Dates

2003-11-10—Published

2001-11-13—Filed