Title:
METHOD FOR PREPARING FULLERENES
Document Type and Number:
Japanese Patent JP3861032
Kind Code:
B2
Abstract:
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, C70 and higher order fullerenes.
SOLUTION: This method includes: a first process of mixing a soot substance containing C60, C70 and higher order fullerenes with an extraction solvent containing an aromatic hydrocarbon to obtain an extracted liquid; a second process of separating C60, C70 and 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 C60 to 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 C60 and the extraction solvent in the dissolved liquid to precipitate C60, C70.
Inventors:
Yasuharu Kikuchi
Asaya Osamu
Soichiro Saida
Asaya Osamu
Soichiro Saida
Application Number:
JP2002185834A
Publication Date:
December 20, 2006
Filing Date:
June 26, 2002
Export Citation:
Assignee:
Mitsubishi Chemical Corporation
International Classes:
B01D15/08; C01B31/02; B01D3/00; B01D3/10; B01D9/02; B01D11/02; (IPC1-7): C01B31/02; B01D3/00; B01D3/10; B01D9/02; B01D11/02; B01D15/08
Domestic Patent References:
| JP5186209A | ||||
| JP6507879A | ||||
| JP5058611A |
Other References:
R.WANG,et al,C60 detection in soot formed in benzene liquid spray combustion in a shock tube,Flullerene Science,1995年,vol.3,No.5,p.553-563
J.B.Howard,et al,Production of C60 and C70 in Benzene-Oxygen Flames,J.Phys.Chem,1992年,Vol.96,p.6657-6662
Timothy P.LOWE, et al,Purification of C84 by selective crystallization,Fullerenes,1996年,Vol.3,p.63-71
J.B.Howard,et al,Production of C60 and C70 in Benzene-Oxygen Flames,J.Phys.Chem,1992年,Vol.96,p.6657-6662
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
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