Patents by Inventor Se-Eun Chang

Se-Eun Chang 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).

  • Synthesis method for magnetite and birnessite aggregate-form mixture
    Patent number: 9174196
    Abstract: The present invention relates to a magnetite-birnessite mixture, to a synthesis method therefor, and to a water-treatment method using the same. The magnetite-birnessite mixture synthesis method according to the present invention includes: a first synthesis step in which magnetite is synthesized; a second synthesis step in which manganese is made to adsorb onto the surface of the magnetite by supplying manganese while maintaining a basic state in the presence of the magnetite, and then synthesizing birnessite on the surface of the magnetite by supplying an oxidizing agent and sodium, thereby synthesizing a mixture in which magnetite and birnessite are bound together; and a purification step in which the mixture of magnetite and birnessite is purified.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: November 3, 2015
    Assignee: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES (KIGAM)
    Inventors: Jae-Gon Kim, Chul-Min Chun, Ho-Cheol Song, In-Hyun Nam, Dong-Wan Cho, Se-Eun Chang
  • MAGNETITE AND BIRNESSITE AGGREGATE-FORM MIXTURE, SYNTHESIS METHOD THEREFOR, AND WATER-TREATMENT METHOD USING MIXTURE
    Publication number: 20130200001
    Abstract: The present invention relates to a magnetite-birnessite mixture, to a synthesis method therefor, and to a water-treatment method using the same. The magnetite-birnessite mixture synthesis method according to the present invention includes: a first synthesis step in which magnetite is synthesized; a second synthesis step in which manganese is made to adsorb onto the surface of the magnetite by supplying manganese while maintaining a basic state in the presence of the magnetite, and then synthesizing birnessite on the surface of the magnetite by supplying an oxidizing agent and sodium, thereby synthesizing a mixture in which magnetite and birnessite are bound together; and a purification step in which the mixture of magnetite and birnessite is purified.
    Type: Application
    Filed: July 7, 2011
    Publication date: August 8, 2013
    Applicant: KOREA INSTITUTE OF GEOSCIENCE AND MINERAL RESOURCES(KIGAM)
    Inventors: Jae-Gon Kim, Chul-Min Chun, Ho-Cheol Song, In-Hyun Nam, Dong-Wan Cho, Se-Eun Chang