Patents by Inventor Jung Jo Jung

Jung Jo Jung 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).

  • Simultaneous preparation of tetrafluoroethylene and hexafluoropropylene
    Patent number: 6924402
    Abstract: The present invention relates to a process for simultaneously preparing tetrafluoroethylene and hexafluoropropylene by the pyrolysis of difluorochloromethane mixed in the molar ratio of super-heated steam/pre-heated difluorochloromethane ([H2O]/[R22]) of 5-10 under the conditions such as a temperature of 730° C. to 760° C. and a residence time of 0.01 to 0.2 seconds, where the unreacted R22 and produced HFP are recycled and controlled to have an appropriate molar ratio of HFP/R22 of 0.01 to 0.1 in order to obtain a high yield of HFP. Thus, the pyrolysis process of the present invention is efficient for preparing TFE and HFP, which are essential monomers in fluorinated resin industry.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: August 2, 2005
    Assignee: Korea Institute of Science and Technology
    Inventors: Dong Ju Moon, Jung Jo Jung, Yong Joon Lee, Sang Deuk Lee, Byoung Sung Ahn
  • Simultaneous preparation of tetrafluoroethylene and hexafluoropropylene
    Publication number: 20040082822
    Abstract: The present invention relates to a process for simultaneously preparing tetrafluoroethylene and hexafluoropropylene by the pyrolysis of difluorochloromethane mixed in the molar ratio of super-heated steam/pre-heated difluorochloromethane ([H2O]/[R22]) of 5-10 under the conditions such as a temperature of 730° C. to 760° C. and a residence time of 0.01 to 0.2 seconds, where the unreacted R22 and produced HFP are recycled and controlled to have an appropriate molar ratio of HFP/R22 of 0.01 to 0.1 in order to obtain a high yield of HFP. Thus, the pyrolysis process of the present invention is efficient for preparing TFE and HFP, which are essential monomers in fluorinated resin industry.
    Type: Application
    Filed: April 16, 2003
    Publication date: April 29, 2004
    Inventors: Dong Ju Moon, Jung Jo Jung, Yong Joon Lee, Sang Deuk Lee, Byoung Sung Ahn