METHOD OF EXTRACTION OF FULLERENES Russian patent published in 2006 - IPC C01B31/02 B01D11/02 

FIELD: chemical industry; methods of extraction of fullerenes.

SUBSTANCE: the invention is pertaining to the field of chemical industry, in particular, to the method of extraction of fullerenes. The method provides that the fullerene-containing soot is mixed with the natural vegetable essential oil. The preferable ratio is 1:(50-200) accordingly. It is possible to use a turpentine oil, camphoric or menthol oil. The mixture is placed in the ultrasonic bath and in the volume of the indicated mixture find a resonant frequency, for example, within 20-50 kHz. It is possible to use the ultrasonic radiation with the sinusoidal, rectangular or sawtooth form of impulses and to affect on the mixture by the selected frequency for no less than 20 minutes at the temperature of 40-80°C. The formed slurry is subjected to centrifuging, preferably, during 30-40 minutes at 20 000-40 000 g, where g is the acceleration of gravity. The supernatant liquid is filtered through the membrane filter with the pores diameter of no more than 0,2 microns. The solution is subjected to evaporation up to a permanent weight, for example, at the temperature of 130-140°C. The invention allows to extract effectively fullerenes, using nontoxic natural extractants.

EFFECT: the invention ensures effective extraction of fullerenes using the nontoxic natural extractants.

11 cl, 2 dwg, 4 ex