Method for producing e-1,3,3,3-tetrafluoropropene (hfc-1234ze) by dehydrofluorination

摘要

Process for the production of fluoropropane of the formula CF3CH = CHF, wherein a mixture of 1,1,1,3,3-pentafluoropropane and Z-1,3,3,3-tetrafluoropropene is present in the presence of an oxygen-containing gas Under contact in the gas phase with a catalyst comprising at least one catalyst selected from the group consisting of Cr / Ni on fluorinated Cr2O3 or fluorided alumina, Z-1,3,3,3- Form a mixture comprising tetrafluoropropane, E-1,3,3,3, -tetrafluoropropene, hydrogen fluoride, and optionally unreacted 1,1,1,3,3-pentafluoropropane Separating E-1,3,3,3-tetrafluoropropene from Z isomer and, if present, unreacted 1,1,1,3,3-pentafluoropropane; Z-1 The method comprising recovering the 3,3,3-tetrafluoropropene, and is provided.