Patents by Inventor Arturo Hernandez-Maldonado

Arturo Hernandez-Maldonado 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).

  • NANOPOROUS PURE SILICA ZEOLITES
    Publication number: 20240033708
    Abstract: This disclosure relates to nanoporous pure silica zeolite (PSZ) adsorbents and uses thereof.
    Type: Application
    Filed: December 17, 2021
    Publication date: February 1, 2024
    Inventors: Arturo HERNANDEZ-MALDONADO, Zhongfang Chen, Rodinson ARRIETA-PEREZ, Daniela RIVERA-MIRABAL, Gabriela DEL VALLE-PEREZ, Yinghe ZHAO, Shiru LIN, Dariana VEGA-SANTANDER
  • Adsorption material for removing chemical compounds from water and method of making the same
    Patent number: 10086359
    Abstract: The invention provides the incorporation of Co2+, Ni2+ or Cu2+ onto the surface of mesoporous SBA-15 via an amino-organic grafting method and the screening of materials as sorbents for the removal of Naproxen from water.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: October 2, 2018
    Assignee: University of Puerto Rico
    Inventors: Arturo Hernandez-Maldonado, Sandra Mendez-Gonzalez, Sindia Rivera-Jimenez
  • Method of synthesizing a novel absorbent titanosilicate material (UPRM-5)
    Patent number: 8440166
    Abstract: A titanium silicate variant named UPRM-5 was prepared using tetraethylammonium hydroxide as a structure-directing agent (SDA). Successful detemplation was achieved via ion exchange with NH4Cl. Effective functionalization was obtained after ion exchanging the detemplated material using SrCl2 and BaCl2. Adsorption of CO2 at 25° C. in Sr- and Ba-UPRM-5 materials activated at different temperatures. For low partial pressures, the observed CO2 adsorption capacities increased as follows: NH4-UPRM-5<Sr-UPRM-5<Ba-UPRM-5. Both the Sr- and Ba-UPRM-5 materials exhibited outstanding selectivity for CO2 over CH4, N2 and O2.
    Type: Grant
    Filed: March 24, 2011
    Date of Patent: May 14, 2013
    Assignee: University of Puerto Rico
    Inventors: Arturo Hernandez-Maldonado, Jose N Primera-Pedrozo
  • Denitrogenation of liquid fuels
    Publication number: 20050150837
    Abstract: A method for removing organo-nitrogen compounds from liquid fuel includes contacting the liquid fuel with an adsorbent which preferentially adsorbs the organo-nitrogen compounds. The adsorption takes place at a selected temperature and pressure, thereby producing a non-adsorbed component and an organo-nitrogen compound-rich adsorbed component. The adsorbent includes either a metal or a metal cation that is adapted to form ?-complexation bonds with the organo-nitrogen compounds, and the preferential adsorption occurs by ?-complexation.
    Type: Application
    Filed: January 9, 2004
    Publication date: July 14, 2005
    Inventors: Ralph Yang, Arturo Hernandez-Maldonado