FIELD: industrial organic synthesis and catalysts.
SUBSTANCE: invention relates to catalysts that can be used in reactions of gas-phase fluorination of halogenated hydrocarbons and provides catalyst for fluorination of halogenated hydrocarbons with hydrogen fluoride gas, which catalyst contains chromium(III) oxide and aluminum compound, the content of latter being 2-15 wt % as calculated for Al2O3. Mixed chromium(III) and aluminum oxides have specific surface 130-300 m2/g, pore volume at least 0.3 cm3/g, and monomodal pore size distribution within the range 70 to 300 Å. Catalyst preparation and activation methods are also described. Fluorination of halogenated hydrocarbons in presence of proposed catalyst is effected at 260-380°C, pressure 0.1-0.5 MPa, and molar ratio of HF to halogenated hydrocarbon between 4:1 and 40:1.
EFFECT: increased activity and selectivity of catalyst.
11 cl, 3 dwg, 2 tbl, 8 ex
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