Patents by Inventor Kazumitsu Mitani

Kazumitsu Mitani 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 controlling the size of coke particles within a fluidized bed
    Patent number: 4049541
    Abstract: A process for controlling the coke balance as well as the size of coke particles within a fluidized bed in the range adapted for continuous operation of a heavy residual oil cracking apparatus, wherein thermal cracking of heavy residual oil is performed under fluidization of coke particles and steam, which comprises classifying one portion of the coke particles withdrawn from the fluidized bed into coarse particles and fine particles by means of a pneumatic classifier, and after the size of said coarse particles have been reduced by combustion, returning them to the fluidized bed along with said fine particles.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: September 20, 1977
    Assignees: Chiyoda Chemical Engineering & Construction Co. Ltd., Mitsubishi Petrochemical Company Limited
    Inventors: Tetsuo Nakagawa, Nobuo Matsuda, Kazumitsu Mitani, Toshiharu Tanemoto