Process for purifying 1,1,1-trifluoro-2-fluoroethane

Details Process for purifying 1,1,1-trifluoro-2-fluoroethane Process for purifying 1,1,1-trifluoro-2-fluoroethane

1994-05-16

1995-12-12

Siegel, Alan

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

Organic compounds

Halogen containing

C07C 1738

Patent

active

054751683

ABSTRACT:
1,1,1-trifluoro-2-fluoroethane (CFC 134a) is purified from 1,1-difluoro-2-chloroethylene (CFC 1122) by reacting a mixture comprising said compounds with hydrofluoric acid, at temperatures from 200.degree. C. to 450.degree. C., in the presence of chrome oxide (Cr.sub.2 O.sub.3) in substantially crystalline form.

REFERENCES:
patent: 3235612 (1966-02-01), Asello
patent: 3755477 (1973-08-01), Firth
patent: 3992325 (1976-11-01), Knaak
patent: 4129603 (1978-12-01), Bell
patent: 4158675 (1979-06-01), Potter
patent: 4948479 (1990-08-01), Brooks et al.
patent: 5001287 (1991-03-01), Fernandez et al.

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