Patents by Inventor Nestor J. Troncoso

Nestor J. Troncoso 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).

  • Treating manganese-containing ores with a metal sulfide
    Patent number: 4752332
    Abstract: A process for treating a first metal, manganese-containing ore comprising contacting the manganese-containing ore with an aqueous, acidic composition and a material containing at least one metal sulfide at conditions effective to (1) chemically reduce at least a portion of the manganese, (2) solubilize at least a portion of the metal from the metal sulfide, and (3) at least partially liberate the first metal from the ore; and recovering the first metal from the ore. The use of Thiobacillus ferrooxidans and/or added ferric ion in the contacting step are also disclosed.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: June 21, 1988
    Assignee: Ensci, Inc.
    Inventors: Rebekah Wu, Larry B. Tsai, Barbara A. Krebs-Yuill, David A. Milligan, Nestor J. Troncoso, John S. McBride, Albert T. Knecht
  • Metal value recovery from metal sulfide containing ores
    Patent number: 4740243
    Abstract: A process for recovering at least one first metal from a metal sulfide-containing ore comprising contacting the ore with an aqueous, acidic composition and at least one reducible manganese-containing material at conditions effective (1) to chemically reduce the manganese, (2) solubilize at least a portion of the metal from the sulfide, and (3) at least partially liberate the first metal from the ore; and recovering the first metal from the ore. The use of added ferric ion and/or Thiobacillus ferrooxidans bacteria in the above-noted contacting is also disclosed.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: April 26, 1988
    Assignee: Ensci, Inc.
    Inventors: Barbara A. Krebs-Yuill, Larry B. Tsai, Rebekah Wu, David A. Milligan, Nestor J. Troncoso
  • Process for removal of sulfur and ash from coal
    Patent number: 4272250
    Abstract: A process for reducing the sulfur and ash content of coal particles wherein coal particles are treated in an aqueous slurry with a minor amount of hydrocarbon oil to form coal-oil aggregates having modified particle size and density characteristics. The coal-oil aggregates are separated from ash and mineral matter in the slurry by gravitational means. Optionally, the coal particles may be treated with a conditioning agent prior to the aggregation step. Recovered coal particles comprise a substantial part of the feed carbon values.
    Type: Grant
    Filed: June 19, 1979
    Date of Patent: June 9, 1981
    Assignee: Atlantic Richfield Company
    Inventors: Emmett H. Burk, Jr., Jui-Yuan Sun, Nestor J. Troncoso
  • Process for removal of sulfur and ash from coal
    Patent number: 4270927
    Abstract: A process for reducing the sulfur and ash content of coal wherein coal particles are treated in an aqueous slurry with a minor amount of hydrocarbon oil to form coal-oil aggregates having modified particle size and density characteristics. The coal-oil aggregates are separated from ash and mineral matter in the slurry by size separation means. Optionally, the coal particles may be treated with a conditioning agent prior to the aggregation step. Recovered coal particles comprise a substantial part of the feed carbon values.
    Type: Grant
    Filed: June 19, 1979
    Date of Patent: June 2, 1981
    Assignee: Atlantic Richfield Company
    Inventors: Emmett H. Burk, Jr., Jui-Yuan Sun, Nestor J. Troncoso