Patents by Inventor Sung Ki Ha

Sung Ki Ha 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).

  • Process for hydrotreatment of a heavy hydrocarbon fraction using permutable reactors and introduction of a middle distillate
    Patent number: 6306287
    Abstract: A hydrotreatment process is carried out in at least two steps to hydrotreat a heavy hydrocarbon fraction containing asphaltenes, sulphur-containing impurities and metallic impurities, comprising a first hydrodemetallization step and a subsequent second hydrodesulphurization step, in which the hydrodemetallization step comprises one or more hydrodemetallization zones with fixed beds preceded by at least two hydrodemetallization guard zones (A) and (B), also with fixed beds, disposed in series for cyclic use consisting of successive repetition of steps b) and c) defined below.
    Type: Grant
    Filed: October 14, 1999
    Date of Patent: October 23, 2001
    Assignee: Institut Francais du Petrole
    Inventors: Alain Billon, Frédéric Morel, Stéphane Kressmann, Sun Dong Kim, Sung Ki Ha, Haen Heor