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US 4,055,628 AGranted
Method for preparing graphite containing carbon
AssigneeThe British Petroleum Company p.l.c.
InventorsJohn James McCarroll, John Trevor Kent Clark, Stephen Robert Tennison
Life of this patent
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Abstract
Graphite-containing carbon is prepared by subjecting carbon to the steps of (1) an initial heat treatment in an inert atmosphere, (2) an oxidation stage and (3) a further heat treatment in an inert atmosphere.
Claims8
A method for the preparation of a graphite-containing carbon having (1) a basal plane surface area of at least 100 m.sup.2 /g;
- (2) a ratio of BET surface area to basal plane surface area of not more than 5:1;
- and (3) a ratio of basal plane surface area to edge surface area of at least 5:1, which method comprises treating a high surface area carbon having a BET surface area of at least 500 m.sup.2 /g to the steps of (1) an initial heat treatment in an inert atmosphere at a temperature between 900.degree. C and 3300.degree. C;
- (2) oxidation stage by heating in an oxidizing atmosphere at a temperature between 300.degree. and 1200.degree. C;
- and (3) a further heat treatment in an inert atmosphere at a temperature between 1000.degree. C and 3000.degree. C.
1 more element
Dependencies are inferred from the claim text.