Patents by Inventor Walter C. Wilfong

Walter C. Wilfong 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).

  • Stable immobilized amine sorbents for REE and heavy metal recovery from liquid sources
    Patent number: 12031029
    Abstract: Materials, methods of making, and methods of using a stable and regenerable immobilized amine sorbents for rare earth element and heavy metal recovery from liquid sources. Embodiments of the invention relate to the novel combination of different polyamines, primarily polyethylenimine Mw=800 (PEI800), and an epoxysilane, namely 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECTMS), covalently immobilizing theREE and heavy metal-adsorbing amine sites within low cost, porous silica particles.
    Type: Grant
    Filed: November 22, 2022
    Date of Patent: July 9, 2024
    Assignee: United States Department of Energy
    Inventors: Mcmahan L. Gray, Brian W. Kail, Walter C. Wilfong, Qiuming Wang
  • STABLE IMMOBILIZED AMINE SORBENTS FOR REE AND HEAVY METAL RECOVERY FROM LIQUID SOURCES
    Publication number: 20230112681
    Abstract: Materials, methods of making, and methods of using a stable and regenerable immobilized amine sorbents for rare earth element and heavy metal recovery from liquid sources. Embodiments of the invention relate to the novel combination of different polyamines, primarily polyethylenimine Mw=800 (PEI800), and an epoxysilane, namely 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECTMS), covalently immobilizing theREE and heavy metal-adsorbing amine sites within low cost, porous silica particles.
    Type: Application
    Filed: November 22, 2022
    Publication date: April 13, 2023
    Inventors: McMahan L. Gray, Brian W. Kail, Walter C. Wilfong, Qiuming Wang
  • Metal-Loaded Basic Immobilized Amine Sorbents For The Removal Of Metal Contaminants From Wastewater
    Publication number: 20210017047
    Abstract: One or more embodiments relate to a method of separating a target contaminant from an aqueous source by contacting a polyamine network-based sorbent with the aqueous source; and capturing and separating the target contaminant from the aqueous source.
    Type: Application
    Filed: July 17, 2020
    Publication date: January 21, 2021
    Inventors: Brian W. Kail, McMahan L. Gray, Walter C. Wilfong, Qiuming Wang, Fan Shi
  • Stable immobilized amine sorbents for removal of an organic contaminate from wastewater
    Patent number: 10836654
    Abstract: The present disclosure relates to a method for the removal of organic contaminates from wastewater. The method comprises contacting wastewater comprising water and an organic contaminate with a basic immobilized amine sorbent, where the basic immobilized amine sorbent comprises a polyamine bound to an inorganic support via a linker, such that contacting the wastewater causes at a least a portion of the organic contaminate to bind to the basic immobilized amine sorbent.
    Type: Grant
    Filed: October 31, 2018
    Date of Patent: November 17, 2020
    Assignee: U.S. Department of Energy
    Inventors: McMahan L. Gray, Brian W. Kail, Qiuming Wang, Walter C. Wilfong
  • Pelletized immobilized amine sorbent for COcapture
    Patent number: 10603654
    Abstract: The disclosure describes a pelletized sorbent comprising a first component comprising Basic Immobilized Amine Sorbent, a second component comprising inorganic strength additive, and a third component comprising polymer binder, where the Basic Immobilized Amine Sorbent and solid inorganic strength additive are interconnected by the polymer binder. The pelletized sorbent is useful for removing CO2 from a gaseous mixture such as a post combustion gas stream.
    Type: Grant
    Filed: August 7, 2018
    Date of Patent: March 31, 2020
    Assignee: U.S. Department of Energy
    Inventors: Walter C. Wilfong, McMahan L. Gray, Yee Soong, Brian W. Kail
  • STABLE IMMOBILIZED AMINE SORBENTS FOR REE AND HEAVY METAL RECOVERY FROM LIQUID SOURCES
    Publication number: 20180100065
    Abstract: Materials, methods of making, and methods of using a stable and regenerable immobilized amine sorbents for rare earth element and heavy metal recovery from liquid sources. Embodiments of the invention relate to the novel combination of different polyamines, primarily polyethylenimine Mw=800 (PEI800), and an epoxysilane, namely 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane (ECTMS), covalently immobilizing the REE and heavy metal-adsorbing amine sites within low cost, porous silica particles.
    Type: Application
    Filed: October 12, 2017
    Publication date: April 12, 2018
    Inventors: McMahan L. Gray, Brian W. Kail, Walter C. Wilfong, Qiuming Wang