High density carbon from coal

Details High density carbon from coal High density carbon from coal

2005-01-20

2010-11-02

Bos, Steven (Department: 1793)

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

C423S448000, C423S460000, C044S620000, C264S029700

Reexamination Certificate

active

07824645

ABSTRACT:
A high density carbon material produced from coal is described. The carbon material may have a density ranging from about 1.0 g/cc to about 1.6 g/cc and may have a crush strength of up to about 20,000 psi. The high density carbon material is produced by slowly heating comminuted swelling bituminous coal particles under pressures of 400 psi to about 500 psi to a first temperature at about the initial plastic temperature of the coal. The material is held at this temperature for a period of time sufficient to provide for a uniform temperature throughout the coal. The material is then heated to a second temperature for a period of time sufficient to provide for the coal achieving an essentially uniform temperature. The resulting product is a three-dimensional, self-supporting carbon that has a substantially continuous carbon matrix defining grain boundaries within the carbon matrix. The characteristics of the carbon material may be altered by further heating to carbonize or graphitize the high density carbon material.

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