Patents by Inventor Alfonso LOPEZ-JUAREZ

Alfonso LOPEZ-JUAREZ 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).

  • Method for bioleaching and solvent extraction with selective recovery of copper and zinc from polymetal concentrates of sulfides
    Patent number: 10280481
    Abstract: A bioleaching and solvent extraction process with selective recovery of copper and zinc from polymetallic sulphide concentrates is described, comprising a bioleaching and ferric ion reducing process and a copper and zinc solvent extraction process. The bioleaching and ferric ion reducing process comprises a concentrates pulp conditioning step; a bioleaching step, wherein once the pulp is conditioned it is subjected to a bioleaching process using a plurality of bioreactors of the stirred-tank type with an air injection and diffusion system, which allows handling of a pulp density higher than 15%; a step of solid separation from a solution rich in metallic ions from the bioleaching step; and, a ferric ion reduction step, wherein the pulp from the previous step is subjected to a transformation step of ferric ions into ferrous ions.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: May 7, 2019
    Assignee: SERVICIOS CONDUMEX S.A. DE C.V.
    Inventors: Belisario Sanchez-Vazquez, Francisco Estrada-De Los Santos, Alfonso Lopez-Juarez, Eric David Buendia-Cachu, Ulises Monter-Valenzuela
  • METHOD FOR BIOLEACHING AND SOLVENT EXTRACTION WITH SELECTIVE RECOVERY OF COPPER AND ZINC FROM POLYMETAL CONCENTRATES OF SULFIDES
    Publication number: 20160115564
    Abstract: A bioleaching and solvent extraction process with selective recovery of copper and zinc from polymetallic sulphide concentrates is described, comprising a bioleaching and ferric ion reducing process and a copper and zinc solvent extraction process. The bioleaching and ferric ion reducing process comprises a concentrates pulp conditioning step; a bioleaching step, wherein once the pulp is conditioned it is subjected to a bioleaching process using a plurality of bioreactors of the stirred-tank type with an air injection and diffusion system, which allows handling of a pulp density higher than 15%; a step of solid separation from a solution rich in metallic ions from the bioleaching step; and, a ferric ion reduction step, wherein the pulp from the previous step is subjected to a transformation step of ferric ions into ferrous ions.
    Type: Application
    Filed: October 30, 2013
    Publication date: April 28, 2016
    Applicant: Servicios Condumex S.A. DE C.V.
    Inventors: Belisario SANCHEZ- VAZQUEZ, Francisco ESTRADA -DE LOS SANTOS, Alfonso LOPEZ-JUAREZ, Eric David BUENDIA-CACHU, Ulises MONTER- VALENZUELA