Synthesis of chloropentafluoroethane

Details Synthesis of chloropentafluoroethane Synthesis of chloropentafluoroethane

1986-11-14

1988-05-17

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Halogen containing

502231, C07C 1720, C07C 1908

Patent

active

047452366

ABSTRACT:
The invention relates to a gas phase process for the manufacture of chloropentafluoroethane by the action of hydrofluoric acid on dichlorotetrafluoroethane in the presence of a catalyst, the said catalyst being prepared by reacting, in a gaseous phase, an alumina in which the sodium oxide content is below 300 ppm and the volume of the pores having a radius equal to 40 angstroms or above is greater than 0.7 cm.sup.3 /g, with hydrofluoric acid or with a mixture of hydrofluoric acid and of air, nitrogen or a fluorinated compound.

REFERENCES:
patent: 2946828 (1960-07-01), Scherer et al.
patent: 3087974 (1963-04-01), Hauptschein et al.
patent: 3258500 (1966-06-01), Swamer et al.
patent: 3793229 (1974-02-01), Groppelli et al.
patent: 3961036 (1976-06-01), Hammer et al.
patent: 4605798 (1986-08-01), Abel et al.
Kirk-Othmer Encyclopedia of Chemical Technology, 3rd ed., vol. 2, p. 225.
L. Marangoni et al., Journal of Fluorine Chemistry, vol. 19, (1981/82) pp. 21-34.
M. Vecchio, Journal of Fluorine Chemistry, vol. 4 (1974), pp. 117-139.

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