Patents Assigned to Sumikin Coke Co., Ltd.
  • Method for thermal cracking of heavy petroleum oil
    Patent number: 4340464
    Abstract: Disclosed is a method for the thermal cracking of a heavy petroleum oil to produce a pitch with a high aromaticity having a high softening point, the ratio of H/C of about 0.4 to 1.1 and the fraction insoluble in n-heptane but soluble in quinoline of higher than 55% by weight and an oil mainly composed of aliphatic hydrocarbon by feeding the heavy petroleum oil into a reaction system and bringing it therein into contact with a gas which does not react with the heavy petroleum oil, of a temperature in the range of from 400.degree. C. to 2000.degree. C., which method is improved by using, as the reaction system, a plurality of reaction vessels arranged in series and having their interior temperatures successively lower by a fixed step in the direction of the transfer of the charge.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: July 20, 1982
    Assignees: Kureha Kagaku Kogyo Kabushiki Kaisha, Sumitomo Metal Industries, Ltd., Sumikin Coke Co., Ltd.
    Inventors: Takaaki Aiba, Hisatsugu Kaji, Tomizo Endo, Takao Ishihara
  • Mass production system of highly aromatic petroleum pitch
    Patent number: 4242196
    Abstract: The mass production system disclosed herein provides a method for producing highly aromatic petroleum pitch, comprising, preheating a liquefied petroleum residuum to a temperature of 450.degree.-520.degree. C. by passing the same through a tubular heater for 0.5-15 minutes, feeding the preheated residuum into a reaction vessel, thermally cracking the same by introducing an inert gas heated to a temperature of 400.degree.-2,000.degree. C. through a heating furnace into the reaction vessel for direct contact with the residuum for 0.5-10 hours, and adjusting to be coincident the ratio of the number of feeding flow lines for the preheated residuum from the tubular heater into the reaction vessels to the total number of reaction vessels with the ratio of the charging time .theta.C required for charging one reaction vessel with one feeding flow of preheated residuum to the total time .theta.T required for carrying out one batch of the thermal cracking in one reaction vessel.
    Type: Grant
    Filed: October 27, 1978
    Date of Patent: December 30, 1980
    Assignees: Kureha Kagaku Kogyo Kabushiki Kaisha, Sumikin Coke Co., Ltd, Sumitomo Metal Industries, Ltd.
    Inventors: Takaaki Aiba, Ryoichi Takahashi, Takuji Hosoi, Tutomu Konno
  • Method for improving coking property of coal for use in production of cokes
    Patent number: 4135983
    Abstract: Raw material coal for coke production having improved coking property is readily obtainable by a simple step of blending raw material coal having poor coking property with a highly aromatic bituminous substance obtained by heat-treating hydrocarbons.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: January 23, 1979
    Assignees: Kureha Kagaku Kogyo Kabushiki Kaisha, Sumikin Coke Co., Ltd.
    Inventors: Yoshio Kiritani, Michio Tsuyuguchi