FIELD: pharmaceuticals.
SUBSTANCE: invention relates to a method of producing 2-perfluoromethylpentene-2 by dimerisation of hexafluoropropene, which is fed 0.15–0.5 l/min at temperature of 200–350 °C per catalyst. Dimerisation is carried out at excess pressure of 100–700 kPa, and said catalyst is active carbon with applied CsF, which is pre-dried in a reactor at temperature of 105–120 °C under vacuum, and then at temperature 250–350 °C, with alternation of nitrogen blowing and evacuation, absolute pressure in both cases is 66.5–1.33 kPa.
EFFECT: obtaining 2-perfluoromethylpentene-2 with output of more than 95 % and selectivity of more than 97 %, simple process technology.
1 cl, 4 tbl, 46 ex
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