Patents by Inventor Jong-Cheul Ji

Jong-Cheul Ji 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 and method for recovering acetic acid and catalyst in process for preparation of 2,6-naphthalenedicarboxylic acid
    Patent number: 7396457
    Abstract: An apparatus and a method for effectively recovering acetic acid and catalyst from a mother liquor discharged from a series of processes including an oxidation process, a crystallization process and a solid-liquid separation process, in a continuous process for preparing naphthalenedicarboxylic acid by oxidizing dimethylnaphthalene in the presence of an oxygen-containing gas and an acetic acid solvent, using a catalyst system comprising a transition metal such as cobalt or manganese, and a bromine-based compound, are provided.
    Type: Grant
    Filed: June 27, 2006
    Date of Patent: July 8, 2008
    Assignee: Hyosung Corporation
    Inventors: Ik-Hyun Kwon, Young-Gyo Choi, Byung-Jun Song, Jong-Cheul Ji
  • Apparatus and method for recovering acetic acid and catalyst in process for preparation of 2,6-naphthalenedicarboxylic acid
    Publication number: 20070299235
    Abstract: An apparatus and a method for effectively recovering acetic acid and catalyst from a mother liquor discharged from a series of processes including an oxidation process, a crystallization process and a solid-liquid separation process, in a continuous process for preparing naphthalenedicarboxylic acid by oxidizing dimethylnaphthalene in the presence of an oxygen-containing gas and an acetic acid solvent, using a catalyst system comprising a transition metal such as cobalt or manganese, and a bromine-based compound, are provided.
    Type: Application
    Filed: June 27, 2006
    Publication date: December 27, 2007
    Applicant: HYOSUNG Corporation
    Inventors: Ik-Hyun Kwon, Young-Gyo Choi, Byung-Jun Song, Jong-Cheul Ji