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2 049 085

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IPC

(21) (22)

Application

93013884/04, 1993-03-17

(22)

Actual filing date

1993-03-17

(45)

Published

1995-11-27

(72)

Inventor

Trukshin I.G.Sheremet'Ev S.K.Barabanov V.G.Temchenko V.G.Uklonskij I.P.Denisenkov V.F.

(73)

Holder

Tovarishchestvo S Ogranichennoj Otvetstvennost'Ju Firma

PROCESS FOR PREPARING PENTAFLUOROETHANE Russian patent published in 1995 - IPC

Abstract RU 2049085 C1

FIELD: refrigerating and fire extinguishing agent. SUBSTANCE: reaction conditions: Reagent 1: tetrahaloethylene or pentahaloethane or a mixture thereof. Reagent 2: an excess amount of HF. Synthesis conditions: hydrofluorination is conducted in a stationary bed of a metal containing hydrofluorination catalyst. The catalyst is preferably a chromium-magnesium fluoride catalyst or chromium on aluminium oxide. The temperature is 310-475 C, the molar ratio of HF to the product to be hydrofluorinated is 0.7-37:1. The contact time is 0.5-20 s. EFFECT: improved properties of the agent. 4 cl, 4 tbl

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RU 2 049 085 C1

Authors

Trukshin I.G.

Sheremet'Ev S.K.

Barabanov V.G.

Temchenko V.G.

Uklonskij I.P.

Denisenkov V.F.

Dates

1995-11-27—Published

1993-03-17—Filed