Back to results
US 6,207,869 B1Granted
Process for perhalofluorinated butanes and hexanes
AssigneeE. I. Du Pont de Nemours and Company
InventorsMario Joseph Nappa, Allen Capron Sievert
Life of this patent
Estimating the term…
Abstract
The instant invention relates to producing perhalofluorobutanes and perhalofluorohexanes, more particularly it relates to their production by utilizing tetrafluoroethylene (hereinafter referred to as “TFE”) and chlorotrifluoro-ethylene (hereinafter referred to as “CTFE”) with selected perhalofluoroethanes containing 2 to 4 nonfluorine halogen and 2 to 4 fluorine substituents in the presence of a polyvalent metal halide such as an aluminum chloride or chlorofluoride as catalyst.
Claims3
A perhalofluorobutane or perhalofluorohexane product made by a process which comprises:
- (i) contacting
- a) CYF=CF2, wherein Y is Cl or F, with
- b) a perhalofluoroethane selected from the group consisting of CX2FCX2F, CX2FCFXF2, CF3CX2F, and CBrF2CF2X, wherein X is either Cl or Br, in the presence of
- c) a catalytically effective polyvalent metal halide at a temperature and pressure and for a time effective to produce
- d) a reaction product mixture containing at least one perhalofluorobutane selected from the group consisting of C4YX4F5, C4YX3F6, C4BrYXF7, and C4YX2F7, or perhalofluorohexane selected from the group consisting of C6X4Y2F8 and C6ClX4Y2F7 wherein X is as defined above;
- and
- (ii) recovering at least one of said perhalofluorobutanes or perhalofluorohexanes from the reaction mixture.
4 more elements
Dependencies are inferred from the claim text.