FIELD: chemistry.
SUBSTANCE: invention can be used in electronics, material science, instrument-making, metrology, information technology, chemistry, ecology, biology and medicine. Initial product of electric arc synthesis is separated into light and heavy fractions by distillation in "boiling layer" mode or by floatation. For "boiling layer" mode air is used as carrier-gas and is supplied at rate, which provides mode of laminar flow of light fraction. Sodium nitrate solution with specific weight 1.26-1.37 g/cm3 is used as floatation liquid. Heavy fraction is processed with concentrated hydrochloric acid and ultrasound, washed, dried and successively oxidised with air oxygen at 450 °C and 600 °C with intermediate processing with concentrated hydrochloric acid and ultrasound, washing and drying until constant weight is obtained.
EFFECT: reduction of process duration, improved quality of separated nanotubes due to reduction in them of metal and amorphous carbon.
4 dwg, 3 ex
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