FIELD: chemical technology.
SUBSTANCE: invention relates to a method for conversion of hydrofluorocarbons, such as HFC-227, HFC-236, HFC-245, HFC-125, HFC-134, HFC-143 and HFC-152 and their corresponding isomers to a perhalogenated compound. The process is carried out by substitution of one or some hydrogen atoms in hydrofluorocarbon with halogen atom of a halogenating agent to yield perhalogenated compounds. The substitution occurs at temperature 150-400°C in the mole ratio of halogenating agent and hydrofluorocarbon = 0.16-22 in the presence of a solid substrate wherein a halogenating agent comprises one atom among Br, Cl and J, and one of components of solid substrate can represent activated carbon, Fe, Cu, Al, clay and metal oxides. Method for conversion of hydrofluorocarbons can involve additionally interaction of perhalogenated compound with a cleaving reagent to form fluoromonomer, such as hexafluoropropene, pentafluoropropene, tetrafluoroethylene, difluoroethylene and trifluoropropene. Invention provides admissible degree of conversion and selectivity.
EFFECT: improved method of conversion.
13 cl, 15 tbl, 11 ex
| Title | Year | Author | Number |
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| METHOD OF PRODUCING 2-CHLORO-3,3,3-TRIFLUOROPROPENE RESULTING FROM GAS PHASE PENTACHLOROPROPANE FLUORINATION | 2010 |
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