Patent ID: 6107529
Filing Date: 2000-08-22
Classification: C07C

Abstract:
A process for the removal of 1,1,2,2tetrafluoroethane from 1,1,1,2-tetrafluoroethane obtained by the hydrogenation of a chlorofluorocarbon or hydrochlorofluorocarbon which process comprises contacting 1,1,1,2-tetrafluoroethane containing 1,1,2,2-tetrafluoroethane with a zeolite having a mean pore size in the range of 3.8 to 4.8 Angstroms and heating the zeolite, when the capacity of the zeolite for adsorbing 1,1,2,2-tetrafluoroethane has been filled, in a gas stream, to desorb the 1,1,2,2-tetrafluoroethane.