Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Patent
1992-04-22
1994-01-25
Lewis, Michael
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
423461, C01B 3100, C01B 3102
Patent
active
052814068
ABSTRACT:
A process has been developed to effectively separate and recover essentially pure amounts of both C.sub.60 and C.sub.70 from carbon soot and higher molecular weight fullerenes. This process first extracts the fullerenes from carbon soot and then sequentially separates the C.sub.60 and C.sub.70 molecules using high performance or low pressure adsorption chromatography packed column containing a gel polymer having aromaticity and a pore size ranging from 10 to 500 .ANG..
In this process, a first stage of fractionation of the fullerenes is preferably accomplished by selective supercritical fluid extraction (SFE) of C.sub.60. Unrecovered C.sub.60 and C.sub.70 molecules are then extracted by supercritical fluid extraction at a higher pressure and/or higher temperature.
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Guo Congyuan
Kuo Kenneth
Saim Said
Stalling David L.
Analytical Bio-Chemistry Laboratories Inc.
Kalinchak Stephen G.
Lewis Michael
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