Column chromatrography of fullerene-containing soot extract using Norit Elorit carbon as the stationary phase, with toluene followed by 1,2-dichlorobenzene, as eluants, gives pure C60 and up to 98% C70 in one pass; production of C60 is very rapid, and both simpler and less expensive than other methods.
A. D. Darwish, H. W. Kroto, R. Taylor and D. R. M. Walton, J. Chem. Soc., Chem. Commun., 1994, 15 DOI: 10.1039/C39940000015
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