METHOD FOR CHROMATOGRAPHIC SEPARATION OF FULLERENES Russian patent published in 2007 - IPC C01B31/02 G01N30/00 

FIELD: fullerene technology.

SUBSTANCE: in accordance to invention, a mixture of fullerenes, dissolved in organic solvent, is let through a column with sorbent. As sorbent, carbonized active silica is used with effective diameter of pores 15-35 nm and specific surface 100-300 m²/g in granulated form, at least 1% of carbon being applied to the surface of aforementioned sorbent. After sorbent is saturated by fullerene mixture, fullerenes are eluted to separate fraction by letting one or serially letting a series of various organic solvents of aromatic origin, such as toluene, o-xylene, o- dichlorobenzene, through the column. Invention allows production of fractions of highest fullerenes with their relative content being 80-95%, provides 5-12 times higher extraction of highest fullerenes from total amount of highest fullerenes fed into columns and 7-13 times higher extraction of highest fullerenes into fractions saturated with them.

EFFECT: method is based on usage of accessible sorbents and solvents and can be easily realized in practice.

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