PROCESS FOR PURIFYING FLUOROETHANES AND CHLOROFLUOROETHANES

摘要

HFC 134A or HCFC 123, HCFC 124, and HFC 125 containing relative impurities at temperatures ranging from -80 ° C to -40 ° C are reacted with fluorine molecules in the liquid phase to form 1,1-difluoro-2-chloroethylene ( 1,1,1-trifluoro-2-fluoroethane (HFC 134A), each from 1, 1, 1-tree from impurities consisting of HCFC 1122) and difluoro dichloroethylene (CFC 1112A and CFC 1112), respectively. Fluoro-2, 2-dichloroethane (HCFC 123), 1,1,1-trifluoro-2-chloro-2-fluoroethane (HCFC 124) and pentanefluoroethane (HFC 125) are purified.