FIELD: chemistry.
SUBSTANCE: invention relates to method of obtaining purified highly pure fluorine from oil of fluorine fraction, in which oil of fluorine fraction, obtained by distillation of initial coal tar oil, which contains fluorine and dibenzofurane, is further subjected to crystallisation from melt. Said crystallisation is realised with application of liquid oil of fluorine fraction, which is slowly cooled during cooling stage to temperature, constituting from 95 to 115°C, with said temperature value depending on initial fluorine content in said oil of fluorine fraction, and cooling rate during stage of crystallisation cooling is lower than approximately 0.05°C/min.
EFFECT: method possesses good reproducibility and does not require additional chemical reagents or solvents.
15 cl, 1 ex
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