Patent ID: 7964760

Claim:
A process for separating a member of the group (a) of components that consists of (i) 1,2-dichloro-1,1,2,2-tetrafluoroethane (R-114), (ii) 1,1-dichloro-1,2,2,2-tetrafluoroethane (R-114a), (iii) 1-chloro-1,2,2,2-tetrafluoroethane (R-124), (iv) 1-chloro-1,1,2,2-tetrafluoroethane (R-124a), and (v) a mixture of any two or more of the components (a)(i), (a)(ii), (a)(iii) and (a)(iv), from a combination of the group (a) component with a member of the group (b) of components that consists of (i) 1,1,2,2-tetrafluoroethane, (ii) 1,1,1,2-tetrafluoroethane and (iii) a mixture of both of the components (b)(i) and (b)(ii); comprising (I) contacting the combination of the group (a) component with the group (b) component with an ionic liquid that comprises a pyridinium cation or an imidazolium cation, and a fluorinated anion; (II) absorbing either the (b)(i) component or the (b)(ii) component into the ionic liquid; and (III) separating the ionic liquid and absorbed component from the combination.