Patents Assigned to Resource Engineering Incorporated
  • Deashing process for coal
    Patent number: 4618346
    Abstract: A process for reducing ash content of coal with an initial concentration of inherent ash of approximately 0.25 w/o to approximately 3 w/o. The coal is swollen and wetted with an alcohol solution such as methanol, then deashed with a mineral acid solution such as hydrochloric and hydrofluoric acid. The demineralized coal is neutralized, washed, and dried for use in making coal slurries with a very low ash content.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: October 21, 1986
    Assignee: Resource Engineering Incorporated
    Inventors: Norman Schapiro, Eugene J. Moreau