FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to a method for preparing fluoro-organic compounds. Method involves the gas-phase catalytic hydrofluorination of trifluoroethylene at increased temperature in the presence of the chrome-magnesium-fluoride catalyst comprising 8-24 wt.-% of trivalent chrome fluoride uniformly distributed in magnesium fluoride with the dispersity index from 0.125 to 0.315 mm. The process is carried out at temperature 140-190C and time contact for 4.5 s. Method provides the high yield of 1,1,1,2-tetrafluoroethane with selectivity index up to 99.9%.
EFFECT: improved preparing method.
2 tbl, 7 ex
| Title | Year | Author | Number |
|---|---|---|---|
| PROCESS FOR PREPARING 1,1,1,2-TETRAFLUOROETHANE AND 1,1,1-TRIFLUOROCHLOROETHANE | 1993 |
|
RU2051139C1 |
| METHOD OF PREPARING 2-HYDROHEPTAFLUOROPROPANE OR MIXTURE OF 2-HYDROHEPTAFLUOROPROPANE AND OCTAFLUOROPROPANE | 1998 |
|
RU2134680C1 |
| METHOD OF PREPARING PENTAFLUOROETHANE | 1997 |
|
RU2141467C1 |
| METHOD OF ACTIVATING CATALYST FOR PRODUCING FLUORINE-CONTAINING HYDROCARBONS | 2009 |
|
RU2449832C2 |
| PROCESS FOR PREPARING PENTAFLUOROETHANE | 1993 |
|
RU2049085C1 |
| METHOD OF ACTIVATING CATALYST FOR PRODUCING FLUORINE-CONTAINING HYDROCARBONS | 2015 |
|
RU2594485C1 |
| PROCESS FOR MANUFACTURING CATALYST FOR VAPOR PASE FLUORINATION OF HALOGENOHYDROCARBONS | 1992 |
|
RU2005539C1 |
| CHLADONE SYNTHESIS CATALYST | 2001 |
|
RU2179885C1 |
| CATALYST, METHOD OF PREPARATION AND ACTIVATION THEREOF, AND HALOGENATED HYDROCARBON FLUORINATION PROCESS | 2007 |
|
RU2322291C1 |
| METHOD OF HYDROFLUORINATION OF FLUOROOLEFINS | 1998 |
|
RU2134257C1 |
