PROCESS FOR THE PREPARATION OF 2,3,3,3 TETRAHYDROFLUOROPROPENE

摘要

The present invention provides a process for preparing 2,3,3,3-tetrafluoropropene (CF 3 CF=CH 2 ), which process comprises dehydrohalogenating 1,1,1,2,2-pentafluoropropane (CH 3 CF 2 CF 3 , HFC-245ca), 1,1,1,2-tetrafluoro-2-chloropropane, 1,1,1,2,3-pentafluoropropane (CH 2 FCHFCF 3 , HFC-245eb) and/or 1,1,1,2-tetrafluoro-3-chloropropane in the presence of a base, the process further comprising the step of converting a trifluorodichloropropane or a difluorotrichloropropane or a fluorotetrachloropropane to CH 3 CF 2 CF 3 , 1,1,1,2-tetrafluoro-2-chloropropane, CH 2 FCHFCF 3 , and/or 1,1,1,2-tetrafluoro-3-chloropropane.