METHOD OF ISOLATING FULLERENES FROM FULLERENE-CONTAINING PRODUCTS Russian patent published in 1998 - IPC

FIELD: carbon modifications. SUBSTANCE: method includes extraction of fullerenes by organic solvent, filtration of extract solution, evaporation of solvent to form solid product containing mixture of fullerene homologues and remaining solution, and elution of solid product solution with organic solvent in chromatographic column. According to invention, evaporation is conducted at 80-120 C for 4 h to 3 days at reduced pressure, and remaining solution is cooled at temperature from -15 to -25 C for 10 to 30 h to form solid product and remaining solution, after which elution of combined solid product is performed. EFFECT: enhanced process efficiency.