METHOD FOR SEPARATING AND REFINING FULLERENES

PURPOSE: To safely separate and refine fullerenes in a short period of time by vacuum-depositing fullerene-contg. carbon soot or the concd. extract of fullerenes. CONSTITUTION: Fullerene-contg. carbon soot obtained by a carbon electrode arc process, laser-beam evaporation, thermal decomposition, etc...

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Hauptverfasser:	NOSAKA TOSHINORI, NISHIDA KATSUMI, NATSUKAWA KAZUTERU, SAKURAI YOSHIAKI, GOTO SHIGEO
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:	PURPOSE: To safely separate and refine fullerenes in a short period of time by vacuum-depositing fullerene-contg. carbon soot or the concd. extract of fullerenes. CONSTITUTION: Fullerene-contg. carbon soot obtained by a carbon electrode arc process, laser-beam evaporation, thermal decomposition, etc., or the fullerenes obtained by extracting the carbon soot with solvent, evaporating and concentrating the extract are charged into a crucible, the crucible is set in the heating part 1 of a vacuum deposition device connected to an evacuating device, and the fullerenes are vapor-deposited on a substrate 2 consisting of a heat-resistant substrate, etc., provided above the heater part 1 at 10 to 10 Pa and 350-700 deg.C. At this time, the fullerenes with the C60 fullerene content remarkably increased are deposited and separated by using a crucible closed with a lid having 0.1-5mm opening since C70 fullerene tends to remain in the crucible.