Title:
METHOD FOR PREPARING FULLERENES
Document Type and Number:
Japanese Patent JP3828839
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for preparing fullerenes by which impurities are selectively removed from a soot substance containing C60, C70 and higher order fullerenes and fullerenes can be manufactured in high purity with high yield.
SOLUTION: This method includes: a first process of mixing the soot substance containing C60, C70 and higher order fullerenes with an extraction solvent containing an aromatic hydrocarbon to prepare an extracted liquid; a second process of adding a poor solvent to the extracted liquid to obtain precipitate of C60, C70 and higher order fullerenes; a third process of again dissolving the precipitate in an extraction solvent to again obtain a dissolved liquid; a fourth process of adding a poor solvent to the dissolved liquid to obtain a solution of C60, C70; and a process of vaporizing the poor solvent and the extraction solvent to obtain crystals of C60, C70.
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Inventors:
Yasuharu Kikuchi
Asaya Osamu
Soichiro Saida
Asaya Osamu
Soichiro Saida
Application Number:
JP2002185832A
Publication Date:
October 04, 2006
Filing Date:
June 26, 2002
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
B01D9/02; C01B31/02; B01D1/00; B01D11/02; (IPC1-7): C01B31/02; B01D1/00; B01D9/02; B01D11/02
Domestic Patent References:
| JP656414A | ||||
| JP558611A | ||||
| JP6183711A | ||||
| JP2005501793A |
Foreign References:
| WO1995006001A1 |
Other References:
A.Yu.ZAKHAROV,et al,Electronic absorpotion spectra determination of C60 content in soot produced in hydrocarbon flames,J.Appl.Spectrosc.,2000年,Vol.67,No.2,p.349-354
R.WANG,et al,C60 detection in soot formed in benzene liquid spray combustion in a shock tube,Flullerene Science & Technology,1995年,vol.3,No.5,p.553-563
J.Thomas MCKINNON,et al,Combustion Synthesis of Fullerenes,Combustion and Flame,1992年,Vol.88,No.1,p.102-112
J.B.Howard,et al,Production of C60 and C70 in Benzene-Oxygen Flames,J.Phys.Chem,1992年,Vol.96,p.6657-6662
X. ZHOU,et al,Separation of C60 and C70 fullerenes in gram quantities by fractional crystallization,Carbon,1994年,Vol.32,no.5,p.935-937
Timothy P.LOWE, et al,Purification of C84 by selective crystallization,Fullerenes,1996年,Vol.3,p.63-71
R.WANG,et al,C60 detection in soot formed in benzene liquid spray combustion in a shock tube,Flullerene Science & Technology,1995年,vol.3,No.5,p.553-563
J.Thomas MCKINNON,et al,Combustion Synthesis of Fullerenes,Combustion and Flame,1992年,Vol.88,No.1,p.102-112
J.B.Howard,et al,Production of C60 and C70 in Benzene-Oxygen Flames,J.Phys.Chem,1992年,Vol.96,p.6657-6662
X. ZHOU,et al,Separation of C60 and C70 fullerenes in gram quantities by fractional crystallization,Carbon,1994年,Vol.32,no.5,p.935-937
Timothy P.LOWE, et al,Purification of C84 by selective crystallization,Fullerenes,1996年,Vol.3,p.63-71
Attorney, Agent or Firm:
Fujio Nakamae