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2 088 564

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C1

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IPC

(21) (22)

Application

95113273/04, 1995-07-26

(22)

Actual filing date

1995-07-26

(45)

Published

1997-08-27

(72)

Inventor

Kornilov V.V.Kostjaev R.A.Mel'Nichenko B.A.Maksimov B.N.

(73)

Holder

Rossijskij Nauchnyj Tsentr Khimija"

METHOD OF SYNTHESIS OF PENTAFLUOROETHANE AND/OR HEXAFLUOROETHANE Russian patent published in 1997 - IPC

Abstract RU 2088564 C1

FIELD: chemical technology. SUBSTANCE: method involves fluorination of polyfluoroethanes - tetrafluoro-, trifluoro-, difluoroethanes or their mixtures with cobalt trifluoride. Process is carried out at 220-390 C at content of an active fluoride in cobalt trifluoride 5-12% at high rate feeding the parent product. Optimal temperatures for synthesis of pentafluoroethane and hexafluoroethane are 220-260 C and 320-390 C, respectively. Yields of pentafluoroethane and hexafluoroethane are 67% and 94%, respectively. EFFECT: increased yield of products. 4 cl, 1 tbl

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RU 2 088 564 C1

Authors

Kornilov V.V.

Kostjaev R.A.

Mel'Nichenko B.A.

Maksimov B.N.

Dates

1997-08-27—Published

1995-07-26—Filed

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