METHOD FOR PREPARING FULLERENES

PROBLEM TO BE SOLVED: To provide a method for preparing fullerenes in high purity with high yield by selectively removing impurities from a soot substance containing C60, C70and higher order fullerenes. SOLUTION: This method includes: a first process of mixing a soot substance containing C60, C70and...

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Bibliographische Detailangaben
Hauptverfasser:	KIKUCHI YASUHARU, ASATANI HARUO, SAIDA SOICHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for preparing fullerenes in high purity with high yield by selectively removing impurities from a soot substance containing C60, C70and higher order fullerenes. SOLUTION: This method includes: a first process of mixing a soot substance containing C60, C70and higher order fullerenes with an extraction solvent containing an aromatic hydrocarbon to obtain an extracted liquid; a second process of separating C60, C70and higher order fullerenes into a liquid phase by liquid chromatography to obtain a separated liquid; a third process of adding a poor solvent having ≤10 mg/L solubility with C60to the separated liquid to precipitate higher order fullerenes and to obtain a dissolved liquid of C60, C70; and a fourth process of distilling and/or cooling the poor solvent of C60and the extraction solvent in the dissolved liquid to precipitate C60, C70. COPYRIGHT: (C)2004,JPO