Patents by Inventor Ricardo Arancibia Cifuentes

Ricardo Arancibia Cifuentes 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