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2 051 140

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C1

(51)

IPC

(21) (22)

Application

93028401/04, 1993-05-25

(22)

Actual filing date

1993-05-25

(45)

Published

1995-12-27

(72)

Inventor

Vinogradov D.V.Khomutov V.A.Barabanov V.G.

(73)

Holder

Rossijskij Nauchnyj Tsentr Khimija"

METHOD FOR PRODUCTION OF DIFLUOROMETHANE Russian patent published in 1995 - IPC

Abstract RU 2051140 C1

FIELD: organic chemistry. SUBSTANCE: dichloromethane is used as reagent 1, hydrogen fluoride being used as reagent 2. Reaction is carried out at 70-150 C in the presence of catalyst. Said catalyst contains 79-96 mass of SbCl5, RF or RF·HF or NaF or NaF·HF or NH4F or NH4F·HF or CSF·HF or mixture thereof. Concentration of said catalyst is 40-85 mass 54-75 mass (as calculated for summary mass of catalyst and CH2CL2) being preferred. EFFECT: increases productivity of the method, increases yield of desired product. 1 tbl

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RU 2 051 140 C1

Authors

Vinogradov D.V.

Khomutov V.A.

Barabanov V.G.

Dates

1995-12-27—Published

1993-05-25—Filed

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