D,L or meso-1,2,3,4-tetrafluorohexachlorobutane;meso or D,L-1,2,3,4-tetrafluorohexachlorobutane;1,2,3,4-tetrafluorohexachlorobutane;1,1,2,3,4,4-hexachloro-1,2,3,4-tetrafluoro-butane;hexachloro-1,2,3,4-tetrafluoro-butane;Hexachlor-1,2,3,4-tetrafluor-butan;1,1,2,3,4,4-Hexachloro-1,2,3,4-tetrafluorobutane
Vanadiumpentafluoride reacts with polyfluorinated and polychlorinated olefins, alkadienes, cycloalkenes and cyclodienes in CFCl3 or without a solvent at −25° to 100°C, forming products of addition of two fluorine atoms across the CC bond.
The present invention relates to a method for preparing hexafluorobutadiene comprising the following steps: (a) hydrodechlorinating hexachlorobutadiene to form a first stream comprising 1,2,3,4-tetrachlorobutadiene and optionally unreacted hexachlorobutadiene; (b) fluorinating the first stream comprising 1,2,3,4-tetrachlorobutadiene obtained in step (a) to form a second stream comprising 1,1,2,3,4,4-hexafluorobutane, (c) dehydrogenating the second stream comprising 1,1,2,3,4,4-hexafluorobutane to form a third stream comprising hexafluorobutadiene.