Separation process

Details Separation process Separation process

B - Operations, Transporting

01

D

B01D 3/40 (2006.01) C07C 7/08 (2006.01) C07C 17/38 (2006.01) C07C 17/386 (2006.01) C07C 19/08 (2006.01)

Patent

CA 2049602

ABSTRACT Z/QM 35397 SEPARATION PROCESS Method for separating HFA 134a 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.

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