Azeotropic mixture of hydrogen fluoride and 1,1,1-trifluoro-2-ch

Details Azeotropic mixture of hydrogen fluoride and 1,1,1-trifluoro-2-ch Azeotropic mixture of hydrogen fluoride and 1,1,1-trifluoro-2-ch

1993-02-12

1994-06-28

Lone, Werren B.

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

Organic compounds

Halogen containing

570123, 570161, 570177, C07C 1738

Patent

active

053248732

ABSTRACT:
Hydrogen fluoride and 1,1,1-trifluoro-2-chloroethane forms an azeotropic mixture. A mixture comprising hydrogen fluoride and 1,1,1-trifluoro-2-chloroethane is phase separated when it is cooled to a temperature below 7.degree. C. 1,1,1-Trifluoro-2-chloroethane is purified effectively from the mixture by cooling the mixture to form an upper liquid phase and a lower liquid phase and distilling the lower liquid phase so that the hydrogen fluoride is removed as an azeotropic distillate and 1,1,1-trifluoro-2-chloroethane substantially free from hydrogen fluoride is obtained as a bottom product.

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