Patents by Inventor Kazunori Shoji

Kazunori Shoji 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 producing a high concentration coal-water slurry
    Patent number: 4900330
    Abstract: A process for continuously and automatically producing a high concentration coal-water slurry having a uniform quality is provided, which process comprises always monitoring the viscosity, concentration, pH, particle diameter distribution and the like of the slurry, detecting the variations of the foregoing and adjusting the quantity of coal fed, the quantity of water fed and the quantities of a surfactant and a pH adjustor added to thereby control the specifications of the coal-water slurry to definite ones.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: February 13, 1990
    Assignee: Babcock-Hitachi Kabushiki-Baisha
    Inventors: Kazunori Shoji, Yoshinori Ohtani, Hirofumi Kikkawa, Hiroshi Terada, Masayasu Murata, Nobuyasu Meguri
  • Process for producing a coal-water slurry
    Patent number: 4786289
    Abstract: A process for producing a coal-water slurry of low viscosity and high coal concentration with a low specific energy and a good efficiency is provided, which process comprises wet-grinding coal by means of a wet vertical ring-roll mill in the presence or absence of a surfactant and recycling a part of the coal ground by the mill, as it is, without classifying it, to the mill through a splitter.
    Type: Grant
    Filed: February 12, 1988
    Date of Patent: November 22, 1988
    Assignee: Babcock-Hitachi Kabushiki Kaisha
    Inventors: Kazunori Shoji, Hirofumi Kikkawa, Hiroshi Takezaki, Yoshinori Ohtani
  • Process for producing a high concentration coal-water slurry
    Patent number: 4747548
    Abstract: A process for producing a coal-water slurry having a low viscosity and a good stability even in a high coal concentration without increase in the production cost is provided, which process is characterized in that when coal is fed to a wet mill and milled therein, the coal feed is divided in a multi-stage manner, also in that two coals of different grindabilities are milled together.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: May 31, 1988
    Assignee: Babcock-Hitachi Kabushiki Kaisha
    Inventors: Hirofumi Kikkawa, Kazunori Shoji, Yasuyuki Nishimura
  • Process for producing a coal-water slurry
    Patent number: 4613084
    Abstract: A process for producing a coal-water slurry having a high coal concentration (generally 60 to 80% by weight or more) and a lower viscosity, at a lower cost and with a smaller amount of dispersing agent added is provided, which process is directed to a process for producing a high concentration coal-water slurry by feeding coal, water and a dispersing agent into a wet, continuous ball mill and wet-milling them, characterized by feeding the dispersing agent in a multi-stage manner along the milling direction of coal within the ball mill.
    Type: Grant
    Filed: June 27, 1984
    Date of Patent: September 23, 1986
    Assignee: Babcock-Hitachi Kabushiki Kaisha
    Inventors: Shigehito Takamoto, Kazunori Shoji, Nobuyasu Meguri, Yoshinori Ohtani, Hirofumi Kikkawa, Yasuyuki Nishimura, Hiroyuki Kaku, Masayasu Murata