Method for preparing 1,1,1,2,2-pentafluoropropane
AssigneeThe Chemours Company Fc, LLC
InventorsXuehui Sun, Mario Joseph Nappa, Karl Krause
Life of this patent
Estimating the term…
Abstract
A method hydrofluorinates an olefin of the formula: RCX=CYZ to produce a hydrofluoroalkane of formula RCXFCHYZ or RCXHCFYZ, where X, Y, and Z are independently the same or different and are selected from the group consisting of H, F, Cl, Br, and C1-C6 alkyl which is partially or fully substituted with chloro or fluoro or bromo; and R is a C1-C6 alkyl which is unsubstituted or substituted with chloro or fluoro or bromo. The method includes reacting the olefin with HF in the vapor phase, in the presence of SbF5, at a temperature ranging from about −30° C. to about 65° C. and compositions formed by the process.
Claims3
A method for preparing 1,1,1,2,2-pentafluoropropane comprising:
- reacting 2,3,3,3-tetrafluoro-1-propene to form a hydrofluoroalkane composition;
- and
- wherein the hydrofluoroalkane composition is formed by reacting HF with 2,3,3,3- tetrafluoro-1-propene in the liquid phase in the presence of a catalyst, the catalyst being an SbF5 catalyst, at a temperature ranging from about -30° C. to about 65° C. to produce the hydrofluoroalkane composition;
- and
- wherein the hydrofluoroalkane composition comprises greater than 95 mole % 1,1,1,2,2-pentafluoropropane.
Dependencies are inferred from the claim text.