PRODUCTION OF CARBON PRODUCTS USING A COAL EXTRACTION PROCESS

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High melting temperature synthetic pitches (Synpitches) were created using coal derivatives produced from a solvent extraction technique. Solvent extraction is used to separate hydrocarbons from mineral matter as well as other insolubles. Mild hydrogenation can be used to chemically modify resultant material to produce a true pitch. There are three main techniques which can be used to tailor the softening point of the Synpitch. First, the softening point can be controlled by varying the conditions of hydrogenation, chiefly the temperature, pressure and residence time in a hydrogen overpressure. Second, by selectively distilling light hydrocarbons, the softening point of the remaining ... continued below

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Dadyburjor, Dady; Chen, Chong; Kennel, Elliot B.; Magean, Liviu; Stansberry, Peter G.; Stiller, Alfred H. et al. December 12, 2005.

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Description

High melting temperature synthetic pitches (Synpitches) were created using coal derivatives produced from a solvent extraction technique. Solvent extraction is used to separate hydrocarbons from mineral matter as well as other insolubles. Mild hydrogenation can be used to chemically modify resultant material to produce a true pitch. There are three main techniques which can be used to tailor the softening point of the Synpitch. First, the softening point can be controlled by varying the conditions of hydrogenation, chiefly the temperature, pressure and residence time in a hydrogen overpressure. Second, by selectively distilling light hydrocarbons, the softening point of the remaining pitch can be raised. Third, the Synpitch can be blended with another mutually soluble pitch or hydrocarbon liquid. Through such techniques, spinnable isotropic Synpitches have been created from coal feedstocks. Characteristics of Synpitches include high cross-linking reactivity and high molecular weight, resulting in carbon fibers with excellent mechanical properties. To date, mechanical properties have been achieved which are comparable to the state of the art achievable with conventional coal tar pitch or petroleum pitch.

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  • Report No.: none
  • Grant Number: FC26-02NT41596
  • DOI: 10.2172/862313 | External Link
  • Office of Scientific & Technical Information Report Number: 862313
  • Archival Resource Key: ark:/67531/metadc792301

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Creation Date

  • December 12, 2005

Added to The UNT Digital Library

  • Dec. 19, 2015, 7:14 p.m.

Description Last Updated

  • Nov. 30, 2016, 6:29 p.m.

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Dadyburjor, Dady; Chen, Chong; Kennel, Elliot B.; Magean, Liviu; Stansberry, Peter G.; Stiller, Alfred H. et al. PRODUCTION OF CARBON PRODUCTS USING A COAL EXTRACTION PROCESS, report, December 12, 2005; United States. (digital.library.unt.edu/ark:/67531/metadc792301/: accessed May 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.