A new process concept shows merit. It offers lower cost processing with lower material costs, producing a cleaner more stable COM. The process uses tall oil to render raw crushed coal hydrophobic and oleophilic. The coal is simultaneously treated, cleaned, and dewatered. It is then mixed with oil. The COM produced has characteristics which show improved stability. The final part of the process converts the coal-oil mixture to a thixotropic gel, thereby assuring stability. Coal cleaned in the CLEANCOM process has significantly less ash content than that obtained in conventional cleaning. It is anticipated that the process can be used to extract coal from tailings or refuse piles. While the COM stability is currently based on No. 2 fuel oil, it is anticipated that the recently discovered difficulties with No. 6 fuel oil can be resolved by an investigation of the chemistry of this fuel and some practical research demonstrating gelation with this material. It was also demonstrated that: chemical grafting to coal does occur, as tested by the oleic acid titration; oleic acid and tall oil provide improved beneficiation by rendering the coal oleophilic/hydrophobic from a CG reaction; conversion oleic acid or tall oil provides a stable COM with sodium hydroxide, using No. 2 fuel oil; and No. 6 fuel oil shows a different COM stability effect using the fatty acid gelation approach. An open item is the determination of mechanisms of gelation formation in No. 6 and No. 2 fuel oils.

  • Corporate Authors:

    Gulf and Western Adv Development and Eng Center

    101 Chester Road
    Swarthmore, PA  United States  19081
  • Authors:
    • Burgess, L E
  • Publication Date: 1978

Media Info

  • Pagination: 99 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00308594
  • Record Type: Publication
  • Source Agency: Energy Research Abstracts
  • Report/Paper Numbers: FE-2694-T2
  • Files: TRIS
  • Created Date: Mar 20 1980 12:00AM