Patents by Inventor Myoung-Jae Choi

Myoung-Jae Choi 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).

  • Apparatus for recovering styrene monomer and method of recovering styrene monomer using auxiliary solvent
    Patent number: 8449725
    Abstract: Described are an apparatus and a method for recovering styrene monomer using an auxiliary solvent, more particularly an apparatus and a method for recovering styrene monomer through pyrolysis of waste polystyrene capable of improving recovery ratio of styrene monomer using an auxiliary solvent such as steam, preventing repolymerization of pyrolyzed styrene monomer and effectively preventing production of unwanted high molecular weight materials.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: May 28, 2013
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Byung Tae Yoon, Myoung Jae Choi, Seong Bo Kim, Sang Bong Lee
  • APPARATUS FOR RECOVERING STYRENE MONOMER AND METHOD OF RECOVERING STYRENE MONOMER USING AUXILIARY SOLVENT
    Publication number: 20110067992
    Abstract: Disclosed are an apparatus and a method for recovering styrene monomer using an auxiliary solvent, more particularly an apparatus and a method for recovering styrene monomer through pyrolysis of waste polystyrene capable of improving recovery ratio of styrene monomer using an auxiliary solvent such as steam, preventing repolymerization of pyrolyzed styrene monomer and effectively preventing production of unwanted high molecular weight materials.
    Type: Application
    Filed: January 27, 2010
    Publication date: March 24, 2011
    Inventors: Byung Tae Yoon, Myoung Jae Choi, Seong Bo Kim, Sang Bong Lee
  • Catalyst for preparing hydrocarbon
    Patent number: 7157404
    Abstract: The present invention relates to a catalyst for preparing hydrocarbons of carbon dioxide and more particularly, the Fe—Cu—K/?—Al2O3 catalyst prepared by impregnation which enables producing hydrocarbons in high yield for more than 2000 hours due to its excellent activity and stability.
    Type: Grant
    Filed: July 14, 2000
    Date of Patent: January 2, 2007
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Ki-Won Jun, Jin-Soo Hwang, Kyu-Wan Lee, Myoung-Jae Choi
  • Process for preparing hydrocarbons
    Patent number: 5952540
    Abstract: This invention relates to a process for preparing hydrocarbons, in particular hydrogenation of carbon dioxide over Fe-K/Al.sub.2 O.sub.3 catalyst, which is reduced in hydrogen and activated in the mixture of carbon dioxide and hydrogen.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: September 14, 1999
    Assignee: Korea Research Institute of Chemical Technology
    Inventors: Kyu Wan Lee, Myoung Jae Choi, Ki Won Jun, Pyoung Ho Choi, Soo Jae Lee