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US 11,525,091 B2Granted
Supercritical CO2 solvated process to convert coal to carbon fibers
AssigneeCarbon Holdings Intellectual Properties, LLC
InventorsCharles Agee Atkins, Matthew Targett
Life of this patent
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Abstract
A method of forming high molecular weight (“HMW”) coal tar can include combining supercritical carbon dioxide (sCO2) and an amount of coal tar, and fractionating the amount of coal tar to form the HMW coal tar. The method can further include forming the amount of coal tar from coal. Forming the amount of coal tar from coal can include extracting the coal tar from an amount of coal using sCO2.
Claims10
A method of forming high molecular weight (“HMW”) coal tar, comprising:
- combining supercritical carbon dioxide (sCO2) and an amount of coal tar;
- fractionating the amount of coal tar to form the HMW coal tar;
- converting the HMW coal tar into mesophase pitch by physically mixing the HMW coal tar with sCO2 in a high pressure environment;
- and
- stabilizing the mesophase pitch by suddenly reducing pressure to cause the sCO2 to leave the mixture.
2 more elements
Dependencies are inferred from the claim text.