Patents by Inventor Kazuki Murahashi

Kazuki Murahashi 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).

  • Patent number: 9687805
    Abstract: The present invention includes a reactor main body (4) that is formed into a tubular shape having an axis (O) as the center and accumulates a slurry (S); a gas supply line (10) for incorporating a synthesis gas (G) into the reactor main body (4), and a sparger part (5) that is disposed in a lower portion within the reactor main body (4), communicates with the gas supply line (10), and sprays the synthesis gas (G). The sparger part (5) includes a header tube (15) in which a plurality of openings are formed so as to be separated from each other in a first direction and which sprays the synthesis gas (G) from the openings, and a pair of wall surface parts that protrude from the header tube (15), on opposing sides of the plurality of openings and in a direction orthogonal to the first direction.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: June 27, 2017
    Assignee: NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.
    Inventors: Kentarou Morita, Kazuki Murahashi, Eiichi Yamada, Yuzuru Kato, Yoshiyuki Saiwai, Atsushi Murata
  • Patent number: 9688918
    Abstract: The hydrocarbon synthesis reaction apparatus according to the present invention includes a reaction vessel that brings a synthesis gas having carbon monoxide gas and hydrogen gas as main components into contact with a slurry having a solid catalyst suspended in a liquid hydrocarbon compound to synthesize a liquid hydrocarbon compound using a Fischer-Tropsch reaction; a filter that is provided within the reaction vessel and is configured to separate the liquid hydrocarbon compound from the catalyst; and a powdered catalyst particles-discharging device configured to discharge powdered catalyst particles in the solid catalyst in the slurry to the outside of the reaction vessel.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: June 27, 2017
    Assignees: Japan Oil, Gas and Metals National Corporation, INPEX CORPORATION, JX Nippon Oil & Energy Corporation, Japan Petroleum Exploration Co., Ltd., COSMO OIL CO., LTD., NIPPON STEEL & SUMIKIN ENGINEERING CO.
    Inventors: Atsushi Murata, Eiichi Yamada, Kazuki Murahashi, Yuzuru Kato, Yasuhiro Onishi
  • Patent number: 9492783
    Abstract: A carbon dioxide gas recovery device is provided which includes an absorption tower causing an absorbent to absorb carbon dioxide gas to generate a rich absorbent and a regeneration tower regenerating a lean absorbent by heating the rich absorbent to separate carbon dioxide gas therefrom. The regeneration tower includes a reboiler system heating the absorbent led out from the regeneration tower and reintroducing the heated absorbent into the regeneration tower and a mixed gas cooling system cooling a mixed gas led out from the regeneration tower, condensing a vapor fraction of a solute and a solvent, reintroducing the condensed vapor fraction into the regeneration tower, and discharging carbon dioxide gas. The carbon dioxide gas recovery device further includes a heat pump as a heat source of an endothermic reaction in which carbon dioxide gas is separated from the rich absorbent in the regeneration tower.
    Type: Grant
    Filed: March 28, 2011
    Date of Patent: November 15, 2016
    Assignees: NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD., THE UNIVERSITY OF TOKYO
    Inventors: Atsushi Tsutsumi, Akira Kishimoto, Yasuki Kansha, Kazuki Murahashi, Tomohiro Mimura, Mikihiro Hayashi, Yutaka Ekuni
  • Patent number: 9463470
    Abstract: Means for Solving the Problem According to an aspect of the present invention, there is provided a magnetic-separation filter device that removes contaminants of fine ferromagnetic particles from a fluid containing such contaminants, comprising: a substantially cylindrical housing; two partition plates that are disposed in an inside of the housing so as to extend in a vertical direction of the housing, dividing the inside of the housing by being disposed in parallel to each other; a filter medium that includes a fine amorphous-alloy wire bundle filled in a first region defined by the housing and the two partition plates; and plural permanent magnets that are provided on both sides of the first region outside the housing, wherein the contaminants of fine ferromagnetic particles are adsorbed on the filter media by flowing the fluid containing such contaminants through the first region in which the magnetic field has been formed by these plural permanent magnets.
    Type: Grant
    Filed: February 28, 2012
    Date of Patent: October 11, 2016
    Assignee: NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.
    Inventors: Kazuki Murahashi, Kentarou Morita, Yuzuru Kato, Atsushi Murata
  • Publication number: 20160160129
    Abstract: The present invention includes a reactor main body (4) that is formed into a tubular shape having an axis (O) as the center and accumulates a slurry (S); a gas supply line (10) for incorporating a synthesis gas (G) into the reactor main body (4), and a sparger part (5) that is disposed in a lower portion within the reactor main body (4), communicates with the gas supply line (10), and sprays the synthesis gas (G). The sparger part (5) includes a header tube (15) in which a plurality of openings are formed so as to be separated from each other in a first direction and which sprays the synthesis gas (G) from the openings, and a pair of wall surface parts that protrude from the header tube (15), on opposing sides of the plurality of openings and in a direction orthogonal to the first direction.
    Type: Application
    Filed: July 15, 2014
    Publication date: June 9, 2016
    Applicant: NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.
    Inventors: Kentarou MORITA, Kazuki MURAHASHI, Eiichi YAMADA, Yuzuru KATO, Yoshiyuki SAIWAI, Atsushi MURATA
  • Publication number: 20160046870
    Abstract: The hydrocarbon synthesis reaction apparatus according to the present invention includes a reaction vessel that brings a synthesis gas having carbon monoxide gas and hydrogen gas as main components into contact with a slurry having a solid catalyst suspended in a liquid hydrocarbon compound to synthesize a liquid hydrocarbon compound using a Fischer-Tropsch reaction; a filter that is provided within the reaction vessel and is configured to separate the liquid hydrocarbon compound from the catalyst; and a powdered catalyst particles-discharging device configured to discharge powdered catalyst particles in the solid catalyst in the slurry to the outside of the reaction vessel.
    Type: Application
    Filed: March 19, 2014
    Publication date: February 18, 2016
    Inventors: Atsushi MURATA, Eiichi YAMADA, Kazuki MURAHASHI, Yuzuru KATO, Yasuhiro ONISHI
  • Publication number: 20130327687
    Abstract: According to an aspect of the present invention, there is provided a magnetic-separation filter device that removes contaminants of fine ferromagnetic particles from a fluid containing such contaminants, comprising: a substantially cylindrical housing; two partition plates that are disposed in an inside of the housing so as to extend in a vertical direction of the housing, dividing the inside of the housing by being disposed in parallel to each other; a filter medium that includes a fine amorphous-alloy wire bundle filled in a first region defined by the housing and the two partition plates; and plural permanent magnets that are provided on both sides of the first region outside the housing, wherein the contaminants of fine ferromagnetic particles are adsorbed on the filter media by flowing the fluid containing such contaminants through the first region in which the magnetic field has been formed by these plural permanent magnets.
    Type: Application
    Filed: February 28, 2012
    Publication date: December 12, 2013
    Applicant: NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.
    Inventors: Kazuki Murahashi, Kentarou Morita, Yuzuru Kato, Atsushi Murata
  • Publication number: 20130055756
    Abstract: A carbon dioxide gas recovery device is provided which includes an absorption tower causing an absorbent to absorb carbon dioxide gas to generate a rich absorbent and a regeneration tower regenerating a lean absorbent by heating the rich absorbent to separate carbon dioxide gas therefrom. The regeneration tower includes a reboiler system heating the absorbent led out from the regeneration tower and reintroducing the heated absorbent into the regeneration tower and a mixed gas cooling system cooling a mixed gas led out from the regeneration tower, condensing a vapor fraction of a solute and a solvent, reintroducing the condensed vapor fraction into the regeneration tower, and discharging carbon dioxide gas. The carbon dioxide gas recovery device further includes a heat pump as a heat source of an endothermic reaction in which carbon dioxide gas is separated from the rich absorbent in the regeneration tower.
    Type: Application
    Filed: March 28, 2011
    Publication date: March 7, 2013
    Inventors: Atsushi Tsutsumi, Akira Kishimoto, Yasuki Kansha, Kazuki Murahashi, Tomohiro Mimura, Mikihiro Hayashi, Yutaka Ekuni
  • Patent number: 6189462
    Abstract: Waste material containing combustible waste substances and incombustible waste substances along with carbonic massive combustibles are feed for passage in a furnace in the form of packed layers. Lower stage tuyeres feed burning support gas in the burning and melting zone of the furnace. Upper stage tuyeres feed burning support gas in the heat decomposing zone of the furnace. Total oxygen fed by the upper and lower tuyeres is 130 to 600 Nm3 per one ton of waste. The ratio of the quantity of oxygen fed from the upper stage tuyeres to the total quantity of oxygen fed from both the upper and lower stage tuyeres is 0.2 to 0.8. Oxygen fed from the lower stage tuyeres is at least 0.8 times the theoretical oxygen required for burning the carbonic massive combustibles.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: February 20, 2001
    Assignee: Nippon Steel Corporation
    Inventors: Yoshihiro Ishida, Youichi Tawara, Yasuhiko Kato, Yoshihiro Ono, Kazuhiro Kuribayashi, Norio Fukinaka, Hachiro Harajiri, Kazuki Murahashi