Patents by Inventor Masayuki Yui

Masayuki Yui 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).

  • Coal-water slurry producing process, system therefor, and slurry transfer mechanism
    Patent number: 6132478
    Abstract: In a coal-water slurry producing system, low grade coal is wet-ground to not greater than 3 mm in particle size to produce a ground coal slurry. An upgrading treatment is applied to the ground coal slurry under a pressurized hydrothermal atmosphere not less than 300.degree. C. to produce an upgraded coal slurry. The upgraded coal slurry is subjected to a dehydration treatment to produce an upgraded coal cake and a filtrate. A final coal-water slurry is produced from the upgraded coal cake. The filtrate is recycled for producing the ground coal slurry. A slurry transfer mechanism is provided in the coal-water slurry producing system for ensuring a stable transfer of the upgraded coal slurry from a high-pressure slurry vessel to a low-pressure slurry vessel.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: October 17, 2000
    Assignee: JGC Corporation
    Inventors: Masao Tsurui, Masanori Asakura, Takashi Goto, Tsutomu Katagiri, Akio Furuta, Takao Takinami, Yoshinori Suto, Kazuhiro Shibata, Jin Ogawa, Masayuki Yui, Shinji Takano