Patents Assigned to Eric Charles Cottell
  • Coal beneficiation process
    Patent number: 4412842
    Abstract: Coal is beneficiated by slurrying coal particles of less than 200 microns in diameter with water. The slurry is cavitated with intense sonic agitation at a level of at least 15 joules/cm.sup.2. While the slurry is in the cavitated state, impurities and water are gravitationally separated from the slurry to produce a coal/water mixture having up to 40 percent by weight water, and preferably, 20 to 35 percent water with the balance coal.
    Type: Grant
    Filed: January 9, 1981
    Date of Patent: November 1, 1983
    Assignee: Eric Charles Cottell
    Inventor: Charles W. Klayer