Membrane process for treatment of fluorinated...

Details Membrane process for treatment of fluorinated... Membrane process for treatment of fluorinated...

B - Operations, Transporting

01

D

183/2

B01D 53/22 (2006.01) B01D 69/12 (2006.01) C07C 19/08 (2006.01)

Patent

CA 2012855

ABSTRACT A membrane process for separating fluorinated hydrocarbon vapors is disclosed. The process employs a permselective membrane that is selectively permeable to fluorinated hydrocarbons over oxygen or nitrogen. The process involves contacting the feed side of the membrane with a gas mixture containing the fluorinated hydrocarbons vapor, and withdrawing from the permeate side a vapor enriched in the fluorinated hydrocarbon component. The driving force for membrane permeation is preferably provided by maintaining a partial vacuum on the permeate side of the membrane. Eighty to 99% of the fluorinated hydrocarbon contained in the feedstream can be removed by the process. The permeate may be sufficiently enriched in fluorinated hydrocarbon to permit recovery and reuse. Very high membrane selectivities are not required.

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