Process for isomerizing 1,1,2-trifluoro-1,2-dichloroethane to 1,

Details Process for isomerizing 1,1,2-trifluoro-1,2-dichloroethane to 1, Process for isomerizing 1,1,2-trifluoro-1,2-dichloroethane to 1,

1995-06-07

1997-02-04

Siegel, Alan

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

Organic compounds

Halogen containing

570163, 570177, C07C 1700, C07C 1908, C07C 1738

Patent

active

056000375

ABSTRACT:
1,1,2-trifluoro-1,2-dichloroethane (Al23a) is isomerized to 1,1,1-tri-fluoro-2,2-dichloroethane (Al23) by contacting it with AlF.sub.3 at temperatures ranging from 180.degree. to 400.degree. C. Advantageously, it is operated with mixtures of Al23a with Al23 and/or other chlorofluorocarbons coming from the preparation of Al23 by hydrofluorination of perchloroethylene.

REFERENCES:
patent: 4766260 (1988-08-01), Manzer
patent: 4925993 (1990-05-01), Zawalski
Chemical Abstracts, vol. 112, No. 19, 7 May 1990, abstract No. 178054q, Shinsuke Morkiawa et al, "Isomerization of hydrogen-containing chlorofluorohydrocarbons", which is an English Abstract of Japanese Patent No. 01258630.

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