Patents by Inventor Larry F. McHugh

Larry F. McHugh 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).

  • Sulfide oxidation process for production of molybdenum oxides from molybdenite
    Patent number: 9187340
    Abstract: A looping method for production of MoO2, the method including reacting molybdenite feed with a substantially stoichiometric mixture comprising MoO3 and oxygen in a first furnace to produce MoO2 and SO2, removing a first portion of the MoO2 from the first furnace, transferring a second portion of the MoO2 from the first furnace to a second furnace, reoxidizing of the transferred portion of the MoO2 in the second furnace to MoO3; and looping the MoO3 from the second furnace to the first furnace for use as an oxidizing agent.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: November 17, 2015
    Assignee: ORCHARD MATERIAL TECHNOLOGY
    Inventors: Larry F. McHugh, Leonid N. Shekhter, Joseph D. Lessard, Daniel G. Gribbin, Esra Cankaya-Yalcin
  • SULFIDE OXIDATION PROCESS FOR PRODUCTION OF MOLYBDENUM OXIDES FROM MOLYBDENITE
    Publication number: 20140161715
    Abstract: A looping method for production of MoO2, the method including reacting molybdenite feed with a substantially stoichiometric mixture comprising MoO3 and oxygen in a first furnace to produce MoO2 and SO2, removing a first portion of the MoO2 from the first furnace, transferring a second portion of the MoO2 from the first furnace to a second furnace, reoxidizing of the transferred portion of the MoO2 in the second furnace to MoO3; and looping the MoO3 from the second furnace to the first furnace for use as an oxidizing agent.
    Type: Application
    Filed: July 19, 2013
    Publication date: June 12, 2014
    Inventors: Larry F. McHugh, Leonid N. Shekhter, Joseph D. Lessard, Daniel G. Gribbin, Esra Cankaya-Yalcin
  • Roasting of molybdenite concentrates containing flotation oils
    Patent number: 4523948
    Abstract: A method is provided for treating molybdenum concentrates in a roasting furnace having a first roasting zone and at least a second roasting zone, the concentrate containing residual flotation oil in an amount over 2% by weight which during roasting inhibits the roasting capacity of the furnace. The improvement resides in deoiling the molybdenite concentrate, feeding the deoiled concentrate to the first roasting zone, and applying heat to the concentrate in the first roasting zone, including the sensible heat of the concentrate and heat generated by extraneous fuel, sufficient to heat the concentrate to a roasting temperature sufficiently high to initiate a substantially self-sustaining roasting reaction but not exceeding about 1250.degree. F. The amount of heat generated by combustion of the extraneous fuel is not substantially in excess of that required to heat the concentrate to the temperature at which self-sustaining roasting reactions are initiated in the first roasting zone.
    Type: Grant
    Filed: February 14, 1984
    Date of Patent: June 18, 1985
    Assignee: Amax Inc.
    Inventors: Larry F. McHugh, Daniel E. Barchers