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2 135 452

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IPC

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Application

97112769/04, 1997-07-29

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Actual filing date

1997-07-29

(45)

Published

1999-08-27

(72)

Inventor

Maksimov B.N.Rjabinin N.A.Kornilov V.V.Irisova E.V.Mel'Nichenko B.A.Kosareva L.N.Sofronov G.A.Danilichev V.F.Shishkin M.M.Kulikov A.N.

(73)

Holder

Rossijskij Nauchnyj Tsentr Khimija"

METHOD OF PURIFYING PERFLUORINATED ORGANIC COMPOUNDS Russian patent published in 1999 - IPC

Abstract RU 2135452 C1

FIELD: purification of organic compounds. SUBSTANCE: invention relates to technology of profound purification of perfluorinated aliphatic and cyclic compounds such as perfluorotributylamine, perfluorodecaline, perfluorooctane, and also perfluorinated polyesters from chemically active fluorine-containing impurities. "Biologically inactive" perfluorinated compounds are obtained by way of adsorption removal of impurities. Perfluorinated compound preliminarily purified to (2-4)•10-4 M fluoride-ion level is passed through column filled with tripoli at 18 to 100 C until (1-2)•10-5 M fluoride-ion level is attained. Degree of purification is evaluated from fluoride-ion level measured by electric resistivity technique, in which resistivity ranges from 1•1015 to 1•1016 Ohm cm. EFFECT: simplified process. 1 tbl, 9 ex

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RU 2 135 452 C1

Authors

Maksimov B.N.

Rjabinin N.A.

Kornilov V.V.

Irisova E.V.

Mel'Nichenko B.A.

Kosareva L.N.

Sofronov G.A.

Danilichev V.F.

Shishkin M.M.

Kulikov A.N.

Dates

1999-08-27—Published

1997-07-29—Filed

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