Patents by Inventor Sanghwan Jo

Sanghwan Jo 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 and apparatus for recovering amide-based compound
    Patent number: 11970445
    Abstract: There is provided a method and an apparatus for efficiently recovering an amide-based compound such as N-methyl-2-pyrrolidone from an aqueous solution containing an amide-based compound such as N-methyl-2-pyrrolidone.
    Type: Grant
    Filed: September 27, 2019
    Date of Patent: April 30, 2024
    Assignee: LG CHEM, LTD.
    Inventors: Sanghwan Jo, Joong Jin Han, Hansol Kim
  • Separation and purification method of polyarylene sulfide
    Patent number: 11661482
    Abstract: The present disclosure relates to a method of more efficiently separating and purifying a polyarylene sulfide exhibiting excellent strength, heat resistance, flame retardancy, and processability when processed into a molded product after polymerization.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: May 30, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Hansol Kim, Joong Jin Han, Sanghwan Jo
  • Separation and recovery method of polyarlene sulfide
    Patent number: 11597800
    Abstract: The present disclosure relates to a method of more efficiently separating and recovering a polyarylene sulfide exhibiting excellent strength, heat resistance, flame retardancy, and processability when processed into a molded product after polymerization.
    Type: Grant
    Filed: October 18, 2019
    Date of Patent: March 7, 2023
    Assignee: LG CHEM, LTD.
    Inventors: Hansol Kim, Joong Jin Han, Sanghwan Jo
  • Preparation method of polyarylene sulfide
    Patent number: 11427683
    Abstract: A preparation method of a polyarylene sulfide that may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method with a high molecular weight at a high yield by optimizing the content and molar ratio of an amide-based compound in a polymerization step.
    Type: Grant
    Filed: July 4, 2019
    Date of Patent: August 30, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Jeongbin Lee, Joong Jin Han, Eunju Park, Sanghwan Jo
  • Process for recovering amide compounds
    Patent number: 11220441
    Abstract: There is provided a method for efficiently recovering amide-based compounds such as N-methyl-2-pyrrolidone from a waste liquid containing amide-based compounds such as N-methyl-2-pyrrolidone generated, for example, in a production process of polyarylene sulfide.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: January 11, 2022
    Assignee: LG CHEM, LTD.
    Inventors: Sanghwan Jo, Joong Jin Han, Hansol Kim
  • PREPARATION METHOD OF POLYARYLENE SULFIDE
    Publication number: 20210238355
    Abstract: The present disclosure relates to a preparation method of a polyarylene sulfide, and this method may produce a polyarylene sulfide having properties equal to or higher than those of the conventional method with a high molecular weight at a high yield by optimizing the content and molar ratio of an amide-based compound in a polymerization step.
    Type: Application
    Filed: July 4, 2019
    Publication date: August 5, 2021
    Inventors: Jeongbin LEE, Joong Jin HAN, Eunju PARK, Sanghwan JO
  • METHOD AND APPARATUS FOR RECOVERING AMIDE-BASED COMPOUND
    Publication number: 20210238137
    Abstract: The present disclosure provides a method and an apparatus for efficiently recovering an amide-based compound such as N-methyl-2-pyrrolidone from an aqueous solution containing an amide-based compound such as N-methyl-2-pyrrolidone.
    Type: Application
    Filed: September 27, 2019
    Publication date: August 5, 2021
    Inventors: Sanghwan Jo, Joong Jin Han, Hansol Kim
  • SEPARATION AND RECOVERY METHOD OF POLYARLENE SULFIDE
    Publication number: 20210238354
    Abstract: The present disclosure relates to a method of more efficiently separating and recovering a polyarylene sulfide exhibiting excellent strength, heat resistance, flame retardancy, and processability when processed into a molded product after polymerization.
    Type: Application
    Filed: October 18, 2019
    Publication date: August 5, 2021
    Inventors: Hansol KIM, Joong Jin HAN, Sanghwan JO
  • SEPARATION AND PURIFICATION METHOD OF POLYARYLENE SULFIDE
    Publication number: 20210214503
    Abstract: The present disclosure relates to a method of more efficiently separating and purifying a polyarylene sulfide exhibiting excellent strength, heat resistance, flame retardancy, and processability when processed into a molded product after polymerization.
    Type: Application
    Filed: October 18, 2019
    Publication date: July 15, 2021
    Inventors: Hansol Kim, Joong Jin Han, Sanghwan Jo
  • PROCESS FOR RECOVERING AMIDE COMPOUNDS
    Publication number: 20210039963
    Abstract: There is provided a method for efficiently recovering amide-based compounds such as N-methyl-2-pyrrolidone from a waste liquid containing amide-based compounds such as N-methyl-2-pyrrolidone generated, for example, in a production process of polyarylene sulfide.
    Type: Application
    Filed: November 15, 2019
    Publication date: February 11, 2021
    Inventors: Sanghwan Jo, Joong Jin Han, Hansol Kim