Patents by Inventor Jorge Vergara Chavez

Jorge Vergara Chavez 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).

  • Copper leach process aids
    Patent number: 6409799
    Abstract: Methods for enhancing the leaching of copper from copper bearing ores with an aqueous sulfuric acid leach solution are disclosed wherein an antifoam formulation stable at a solution pH of about 1 to 2 is added. A preferred antifoam formulation comprises a glycol ester and an alkyl phenol ethoxylate in a paraffinic oil solvent added to the aqueous sulfuric acid leach solution.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: June 25, 2002
    Assignee: Betzdearborn Inc. & Corporacion Nacional del Cobre de Chile
    Inventors: Ricardo Arancibia Cifuentes, Donald C. Roe, Jorge Vergara Chavez, Andres Reghezza Inzunza
  • Copper leach process aids
    Patent number: 6261341
    Abstract: A method for inhibiting crud formation and organic in aqueous solvent and aqueous in organic solvent entrainment in the solvent extraction of copper from an aqueous sulfuric acid pregnant leach solution is disclosed. The method comprises adding an antifoam formulation stable at a solution pH of about 1 to 2 is added. A preferred antifoam formulation comprises a glycol ester and an alkyl phenol ethoxylate in a paraffinic oil solvent added to the acid solution.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: July 17, 2001
    Assignees: BetzDearborn Inc., Corporacion Nacional del Cobre de Chile
    Inventors: Ricardo Arancibia Cifuentes, Donald C. Roe, Jorge Vergara Chavez, Andres Reghezza Inzunza
  • Copper leach process aids
    Patent number: 6258245
    Abstract: A method for enhancing the operation of an acid solvent extraction and electrowinning operation by inhibiting acidic aerosol formation, allowing increased acid concentration and allowing higher operating temperature is disclosed wherein an antifoam formulation stable at a solution pH of about 1 to 2 is added. A preferred antifoam formulation comprises a glycol ester and an alkyl phenol ethoxylate in a paraffinic oil solvent added to the acid solution of an acid solvent extraction and electrowinning operation.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: July 10, 2001
    Assignees: BetzDearborn Inc., Corporación Nacional del Cobre de Chile
    Inventors: Ricardo Arancibia Cifuentes, Donald C. Roe, Jorge Vergara Chavez, Andres Reghezza Inzunza
  • Methods for purifying aqueous phases in hydrometallurgical extractions
    Patent number: 5427605
    Abstract: A method in which a contaminated aqueous solution produced as a result of a hydrometallurgical extraction operation is passed through a filtering bed comprising a plurality of elements, optionally of differing sizes and shapes, formed from materials including plastics and their derivatives, polypropylene, polyester, nylon, teflon, etc., so as to remove organic phase residues, solids, and other contaminants therefrom. The method is complemented by a back wash stage using air and water to dislodge the contaminants from the bed to permit subsequent collection and/or treatment of these materials. The method exhibits technical and economic advantages that are very significant in comparison to traditional methods.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: June 27, 1995
    Assignee: Corporation Nacional del Cobre de Chile
    Inventors: Renzo A. Gasparini Noziglia, Gustavo H. Bannach Sichtermann, Aliro T. N. Pincheira Alvarez, Andres A. Reghezza Inzunza, Alberto S. Cruz Rivera, Gino S. Slanzi Guerra, Jorge A. Vergara Chavez, Tomas S. Lorca Soto, Gonzalo R. Cerda Varela, Luis F. Hidalgo Cortes, Elio F. Moyano Cossio, Gabriel E. Vera Baeza, Samuel F. Castillo Correa