Patents by Inventor Elizabeth POLIDO LEGARIA

Elizabeth POLIDO LEGARIA 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).

  • Separation of rare earth elements from other elements
    Patent number: 10787722
    Abstract: A process for separating rare earth elements (REE) from Ca, Mg and other non-REE elements comprises raising the pH of an acidic aqueous solution of REE to pH 8 to pH 11; adding nano- or micro (NoM) particles having a silica or titanium oxide surface; agitating the suspension for 6 h to 48 h to provide for adherent crystallization of REE hydroxide on the particles; separating the particles from the solution; releasing REE by treatment with aqueous acid to form an aqueous solution of REE salt; separating them from the aqueous solution of REE salt formed. The acidic aqueous solution comprising REE is preferably provided by leaching of an REE mineral with aqueous acid; adding a base to bring the pH to from pH 4.0 to pH 6.5; separating precipitated non-REE hydroxide from the solution.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: September 29, 2020
    Inventors: Gulaim A. Seisenbaeva, Elizabeth Polido Legaria, Vadim Kessler
  • SEPARATION OF RARE EARTH ELEMENTS FROM OTHER ELEMENTS
    Publication number: 20190226055
    Abstract: A process for separating rare earth elements (REE) from Ca, Mg and other non-REE elements comprises raising the pH of an acidic aqueous solution of REE to pH 8 to pH 11; adding nano- or micro (NoM) particles having a silica or titanium oxide surface; agitating the suspension for 6 h to 48 h to provide for adherent crystallization of REE hydroxide on the particles; separating the particles from the solution; releasing REE by treatment with aqueous acid to form an aqueous solution of REE salt; separating them from the aqueous solution of REE salt formed. The acidic aqueous solution comprising REE is preferably provided by leaching of an REE mineral with aqueous acid; adding a base to bring the pH to from pH 4.0 to pH 6.5; separating precipitated non-REE hydroxide from the solution.
    Type: Application
    Filed: May 10, 2017
    Publication date: July 25, 2019
    Inventors: Gulaim A. SEISENBAEVA, Elizabeth POLIDO LEGARIA, Vadim KESSLER