Patents by Inventor Kurt R. Anast

Kurt R. Anast has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Chemical leaching of coal to remove ash, alkali and vanadium
    Patent number: 4582512
    Abstract: Powdered coal is upgraded in utility and heat value by removal of ash and pyrite constituents by successively pressure caustic leaching the coal slurry at a temperature of at least about 175.degree. C., hydrochloric acid leaching the caustic leached coal to dissolve ash and pyrite residues not dissolved by the caustic, and pressure leaching the acid leached coal to remove alkali metals and chloride. Vanadium is also removed by the process.
    Type: Grant
    Filed: June 20, 1984
    Date of Patent: April 15, 1986
    Assignee: AMAX Inc.
    Inventors: Francis J. Smit, Dale K. Huggins, Mark Berggren, Kurt R. Anast