Efficient process of etching highly graphitic carbons
AssigneeCabot Corporation
InventorsBrian Mahoney, William C. Holler, Jeffrey S. Sawrey, Qian Ni, Akshay Gopan, Andriy Korchev
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Abstract
A method of increasing porosity of graphitic carbon black comprises combining graphitic carbon black having a Raman planar size (La) of at least 20 Angstroms with at least 100 ppm of an alkaline earth element selected from strontium, barium, and a mixture of both to form a mixture, and contacting the mixture with an etchant at a temperature of 900-1400° C. until 2%-85% of the mass of the carbon black is lost.
Claims15
A carbon black having the following characteristics:
- Raman planar size (La) of at least 21.5 Angstroms, a cumulative pore volume of pores having a diameter of 2 nm-6 nm of at least 0.1 cc/g, and at least 200 ppm strontium, barium, or both.
A method of increasing porosity of graphitic carbon black, comprising:
- combining graphitic carbon black having a Raman planar size (La) of at least 20 Angstroms with at least 100 ppm of an alkaline earth element selected from strontium, barium, and a mixture of both to form a mixture;
- and
- contacting the mixture with an etchant at a temperature of 900-1400° C. until 2%-85% of the mass of the carbon black is lost.
A method of producing porous graphitic carbon black, comprising:
- thermally decomposing hydrocarbon feedstock to obtain graphitic carbon black;
- and
- contacting the graphitic carbon black with an etchant and at least 100 ppm of an alkaline earth element selected from strontium, barium, and a mixture of both to form a mixture.
15-20. (canceled)
Dependencies are inferred from the claim text.