Process for the separation of halogenated hydrocarbons by extrac

Details Process for the separation of halogenated hydrocarbons by extrac Process for the separation of halogenated hydrocarbons by extrac

1991-08-21

1993-04-06

Cintins, Marianne M.

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

Organic compounds

Halogen containing

203 64, C07C 1738

Patent

active

052004317

ABSTRACT:
Method for separating 1,1,1,2-tetrafluoroethane from a mixture thereof with chlorine-containing halogenated hydrocarbons such as HCFC's 1122, 124, 114, 114a and 133a which comprises adding an extraction agent to the mixture and extractively distilling the mixture in an extractive distillation zone from which HFA 134a containing less than 10 ppm of chlorinated contaminants is recovered. Suitable extraction agents include trichloroethylene, perchloroethylene, alpha-pinene and cyclohexane.

REFERENCES:
patent: 3689374 (1972-09-01), Hanson
patent: 3819493 (1974-06-01), Fozzard

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