FIELD: chemistry.
SUBSTANCE: crystalline fullerene C60 is heat treated at 160-170°C in an inert gas stream to transfer the oxide impurity C60O into the dioxide impurity C120O. The treated crystalline product is then dissolved in a weakly polar aromatic solvent, for example, ortho-xylene. To convert C120O to the precipitated phase, a strongly polar solvent is added, the molecule of which does not contain double bonds, and a nitrogen atom, for example isopropyl alcohol. The volume ratio of ortho-xylene:isopropyl alcohol is 1:(0.35-0.75), respectively. After this, C120O is separated by filtration, and the desired product - fullerene C60, remaining in the solvent mixture solution, is isolated by evaporation.
EFFECT: method is simplified, irreversible losses of expensive C60 are reduced.
2 cl, 6 tbl
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