Process for the removal of impurities from combustion fullerenes

Alford, J. Michael; Bolskar, Robert

Process for the removal of impurities from combustion fullerenes

Patent · Tue Aug 02 04:00:00 EDT 2005

OSTI ID:1175445

Alford, J. Michael; Bolskar, Robert

The invention generally relates to purification of carbon nanomaterials, particularly fullerenes, by removal of PAHs and other hydrocarbon impurities. The inventive process involves extracting a sample containing carbon nanomaterials with a solvent in which the PAHs are substantially soluble but in which the carbon nanomaterials are not substantially soluble. The sample can be repeatedly or continuously extracted with one or more solvents to remove a greater amount of impurities. Preferred solvents include ethanol, diethyl ether, and acetone. The invention also provides a process for efficiently separating solvent extractable fullerenes from samples containing fullerenes and PAHs wherein the sample is extracted with a solvent in which both fullerenes and PAHs are substantially soluble and the sample extract then undergoes selective extraction to remove PAHs. Suitable solvents in which both fullerenes and PAHs are soluble include o-xylene, toluene, and o-dichlorobenzene. The purification process is capable of treating quantities of combustion soot in excess of one kilogram and can produce fullerenes or fullerenic soot of suitable purity for many applications.

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Research Organization:: TDA Research, Inc., Wheat Ridge, CO (Unites States)

Sponsoring Organization:: USDOE

DOE Contract Number:: FG03-98ER82692

Assignee:: TDA Research, Inc. (Wheat Ridge, CO)

Patent Number(s):: 6,923,915

Application Number:: 10/233,010

OSTI ID:: 1175445

Country of Publication:: United States

Language:: English

References (23)

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