Patents by Inventor Masatoyo Shiraiwa

Masatoyo Shiraiwa 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).

  • Method for rapid cooling of thermally cracked gases of hydrocarbons and apparatus for carrying out the method
    Patent number: 4016066
    Abstract: A method for rapid cooling of high temperature reaction gases obtained by ermal cracking of hydrocarbons, which comprises conducting an indirect heat exchange between a high temperature reaction gas obtained by thermal cracking of a hydrocarbon and a molten metal maintained at a prescribed temperature, lest heavy components in the high temperature gas be substantially condensed. In this method, the molten metal can be circulated by the use of a pressurized inert gas. In practice of this method, there can be effectively used a high temperature reaction gas cooling apparatus comprising a double-tubular heat exchanger, a cooling tank connected to said heat exchanger, and an inert gas circulating passage connected to a conduit connecting said heat exchanger and said cooling tank.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: April 5, 1977
    Assignee: Idemitsu Sekiyukagaku Kabushiki Kaisha (Idemitsu Petrochemical Co., Ltd.)
    Inventors: Masatoyo Shiraiwa, Ichiro Tokumitsu, Toshisada Takemura, Satoshi Hatano, Hiroshi Yamaguchi