Patents by Inventor Noriyuki Okuyama

Noriyuki Okuyama 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: 10131858
    Abstract: The present invention is provided with a step for preheating coal, a step for heating an extraction solvent, a step for mixing the preheated coal and the extraction solvent heated to a higher temperature than the preheated coal and thereby heating the coal, a step for separating a solution in which a coal component is dissolved from the mixture of the coal and the extraction solvent, and a step for evaporating and separating the extraction solvent from the solution.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: November 20, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Sakai, Noriyuki Okuyama, Takuya Yoshida, Shigeru Kinoshita
  • Publication number: 20180320097
    Abstract: A method for producing ash-free coal includes: pulverizing a coal in the presence of a protection solvent; heating an extraction solvent; mixing pulverized matter obtained after the pulverizing, with the extraction solvent obtained after the heating; separating a solution containing a coal component dissolved therein, from a slurry obtained after the mixing; and evaporatively separating the protection solvent and the extraction solvent from the solution obtained after the separating.
    Type: Application
    Filed: November 9, 2016
    Publication date: November 8, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd)
    Inventors: Koji SAKAI, Noriyuki OKUYAMA, Takuya YOSHIDA, Shigeru KINOSHITA
  • Patent number: 10035967
    Abstract: A method for producing an ashless coal which includes a slurry preparation step, an extraction step, a separation step, an ashless coal acquirement step, and a by-product acquirement step. The separation step is conducted under the state of being pressurized to a pressure equal to or higher than a vapor pressure of the solvent. In the by-product acquirement step, the solvent is evaporated and separated from the solid content-concentrated slurry by spraying the solid content-concentrated slurry into a flash tank in which a pressure is set to lower than a saturation pressure of the solid content-concentrated slurry from a spray nozzle while maintaining a pressure of the solid content-concentrated slurry in a nozzle orifice of the spray nozzle at a level equal to or higher than the vapor pressure of the solvent.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: July 31, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Takuya Yoshida, Noriyuki Okuyama, Shigeru Kinoshita, Koji Sakai
  • Patent number: 9938477
    Abstract: A production apparatus of an ashless coal includes a preheater, an extraction tank, a feed pipe, a solid-liquid separator and a solvent separator. The preheater heats a solvent. The extraction tank extracts a coal component soluble in the solvent from a slurry including a mixture of a coal and the solvent heated by the preheater. The coal feeding unit feeds the coal to the feed pipe by pressuring a feed part to the feed pipe such that the solvent does not flow back. The solid-liquid separator separates a solution part containing the coal component from the slurry. The solvent separator evaporates and separates the solvent from the solution part to obtain an ashless coal.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: April 10, 2018
    Assignee: Kobe Steel, Ltd.
    Inventors: Noriyuki Okuyama, Koji Sakai, Takuya Yoshida, Shigeru Kinoshita, Maki Hamaguchi
  • Publication number: 20180044603
    Abstract: A method for producing an ash-free coal includes a step of mixing a coal with a solvent to prepare a slurry; a step of dissolving away a coal component soluble in the solvent, from the coal, by heating the slurry; a step of separating the solution containing the coal component dissolved therein from the slurry after the dissolution; and a step of subjecting the solution separated in the separation step to a vaporization and a separation of the solvent to obtain an ash-free coal. The separation step and the dissolution step are simultaneously performed.
    Type: Application
    Filed: February 19, 2016
    Publication date: February 15, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Koji SAKAI, Noriyuki OKUYAMA, Takuya YOSHIDA, Shigeru KINOSHITA
  • Patent number: 9752088
    Abstract: A method for producing an ashless coal includes an extraction step, a separation step and an ashless coal acquirement step. In the extraction step, a slurry obtained by mixing a coal with a solvent is heated and thereby a solvent-soluble component of the coal is extracted. In the separation step, the slurry is separated into a solution of the solvent-soluble component of the coal and a solid content-concentrated liquid. In the ashless coal acquirement step, an ashless coal is obtained by evaporating and separating the solvent from the solution. The solvent is a mixture of a dissolution medium and a coal extraction accelerator added thereto. The solvent contains a bicyclic aromatic compound that is liquid at ordinary temperature. The coal extraction accelerator containing no nitrogen has two benzene rings and has at least one cyclic structure having no double bond.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: September 5, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Sakai, Noriyuki Okuyama, Shigeru Kinoshita, Takuya Yoshida
  • Patent number: 9714394
    Abstract: A method for producing an ashless coal includes a slurry preparation, an extraction, a separation, an ashless coal acquirement, and a by-product acquirement. In the by-product acquirement, a solvent used in the slurry preparation is evaporated and separated from a solid-content concentrated liquid separated in the separation, and then, a by-product coal is acquired. The by-product coal is used as a fuel for heating a slurry obtained in the slurry preparation.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: July 25, 2017
    Assignee: Kobe Steel, Ltd.
    Inventors: Shigeru Kinoshita, Noriyuki Okuyama, Takuya Yoshida, Koji Sakai
  • Publication number: 20160272910
    Abstract: Provided is a method for producing ashless coal, said method comprising a slurry preparation step in which a slurry is prepared by mixing coal and a solvent, the coal that is included in the slurry is dewatered, and the temperature of the slurry is increased. The slurry preparation step comprises a preparation/dewatering step and a preparation/temperature increase step. In the preparation/dewatering step, preparation of the slurry and dewatering of the coal are performed by mixing coal and a liquid solvent that is circulated during a circulation step. In the preparation/temperature increase step, the slurry is prepared and the temperature of the slurry is increased by mixing the slurry with solvent vapor that is circulated during the circulation step.
    Type: Application
    Filed: December 9, 2014
    Publication date: September 22, 2016
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Shigeru KINOSHITA, Noriyuki OKUYAMA, Takuya YOSHIDA, Koji SAKAI
  • Publication number: 20160230107
    Abstract: A method for producing an ashless coal includes an extraction step, a separation step and an ashless coal acquirement step. In the extraction step, a slurry obtained by mixing a coal with a solvent is heated and thereby a solvent-soluble component of the coal is extracted. In the separation step, the slurry is separated into a solution of the solvent-soluble component of the coal and a solid content-concentrated liquid. In the ashless coal acquirement step, an ashless coal is obtained by evaporating and separating the solvent from the solution. The solvent is a mixture of a dissolution medium and a coal extraction accelerator added thereto. The solvent contains a bicyclic aromatic compound that is liquid at ordinary temperature. The coal extraction accelerator containing no nitrogen has two benzene rings and has at least one cyclic structure having no double bond.
    Type: Application
    Filed: October 8, 2014
    Publication date: August 11, 2016
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Koji SAKAI, Noriyuki OKUYAMA, Shigeru KINOSHITA, Takuya YOSHIDA
  • Patent number: 9382493
    Abstract: Provided is an ash-free coal production method without the need to once re-liquefy and form an ash-free coal. The ash-free coal production method includes an extraction step of mixing coal with a solvent to prepare a slurry and heating the slurry to extract a solvent-soluble coal component; a separation step of separating a solution containing the solvent-soluble coal component from the slurry obtained from the extraction step; an ash-free coal obtaining step of evaporatively separating the solvent from the solution separated in the separation step to obtain an ash-free coal. The ash-free coal obtaining step in the production method is performed so that the solvent is evaporatively separated from the solution to give a liquid ash-free coal, and the liquid ash-free coal is brought into contact with a solidifier (e.g., water) to solidify into a predetermined shape.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: July 5, 2016
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Sakai, Noriyuki Okuyama, Shigeru Kinoshita, Takuya Yoshida, Takahiro Shishido, Maki Hamaguchi
  • Patent number: 9334456
    Abstract: Provided is a method that controls and uniformizes fluidity of ash-free coal. The method includes the steps of obtaining an ash-free coal by removing a solvent from a solution containing a coal component dissolved therein (ash-free coal obtaining step (solvent recovering unit 8)); and mixing a plurality of coals of different types or components thereof, where the coals are capable of individually giving ash-free coals having different fluidities (mixing step (see reference signs B1 to B6)). The ash-free coal obtaining step (solvent recovering unit 8) obtains the ash-free coal by removing the solvent from the solution containing components of the coals which have been mixed.
    Type: Grant
    Filed: December 7, 2012
    Date of Patent: May 10, 2016
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Sakai, Takahiro Shishido, Noriyuki Okuyama, Maki Hamaguchi
  • Patent number: 9334457
    Abstract: Provided is an ash-free coal production method that can produce an ash-free coal efficiently with a higher solvent recovery rate. The ash-free coal production method includes an extraction step of mixing coal with a solvent to give a slurry and heating the slurry to extract a solvent-soluble coal component; a separation step of separating a solution containing the coal component from the slurry containing the extracted coal component; and an ash-free coal obtaining step of separating and recovering the solvent from the separated solution to give an ash-free coal. The ash-free coal obtaining step includes a pressure-reducing substep of reducing a pressure to a level lower than the solvent vapor pressure to evaporatively separate the solvent from the solution to thereby give a solid ash-free coal; and a heating substep of heating the solid ash-free coal to evaporatively separate a residual solvent from the ash-free coal.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: May 10, 2016
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Sakai, Noriyuki Okuyama, Shigeru Kinoshita, Takuya Yoshida
  • Patent number: 9315751
    Abstract: A gravitational settling tank including a pressure vessel which precipitates solid content contained in slurry in which coal and solvent are blended, and separates the solid-content concentrated liquid from the supernatant liquid, and a supply pipe which supplies the pressure vessel with the slurry. A main body part and a nozzle part which is connected on the downstream side of the main body part and extends horizontally are provided in the supply pipe. A plurality of holes are provided in the nozzle part. By virtue of this, agitation of the solid-content concentrated liquid which has settled in the bottom is inhibited.
    Type: Grant
    Filed: June 22, 2012
    Date of Patent: April 19, 2016
    Assignee: Kobe Steel, Ltd.
    Inventors: Koji Sakai, Takahiro Shishido, Noriyuki Okuyama, Maki Hamaguchi
  • Publication number: 20160010011
    Abstract: A method for producing an ashless coal includes a slurry preparation, an extraction, a separation, an ashless coal acquirement, and a by-product acquirement. In the by-product acquirement, a solvent used in the slurry preparation is evaporated and separated from a solid-content concentrated liquid separated in the separation, and then, a by-product coal is acquired. The by-product coal is used as a fuel for heating a slurry obtained in the slurry preparation.
    Type: Application
    Filed: March 17, 2014
    Publication date: January 14, 2016
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Shigeru KINOSHITA, Noriyuki OKUYAMA, Takuya YOSHIDA, Koji SAKAI
  • Publication number: 20160002551
    Abstract: A production apparatus of an ashless coal includes a preheater, an extraction tank, a feed pipe, a solid-liquid separator and a solvent separator. The preheater heats a solvent. The extraction tank extracts a coal component soluble in the solvent from a slurry including a mixture of a coal and the solvent heated by the preheater. The coal feeding unit feeds the coal to the feed pipe by pressuring a feed part to the feed pipe such that the solvent does not flow back. The solid-liquid separator separates a solution part containing the coal component from the slurry. The solvent separator evaporates and separates the solvent from the solution part to obtain an ashless coal.
    Type: Application
    Filed: March 26, 2014
    Publication date: January 7, 2016
    Inventors: Noriyuki OKUYAMA, Koji SAKAI, Takuya YOSHIDA, Shigeru KINOSHITA, Maki HAMAGUCHI
  • Publication number: 20150376528
    Abstract: In a method for producing residue coal according to the present invention, a solvent is separated by evaporation from a solid material concentrate, which has been separated in a gravity settling vessel (7), in a solvent separator (10), thereby producing a residue coal mixture in which the solvent is remained in the residue coal. Subsequently, the remaining solvent is separated by evaporation from the residue coal mixture in a drier (11), thereby producing the residue coal. In the drier (11), the remaining solvent is separated by evaporation from the residue coal mixture utilizing a heat the residue coal mixture itself has. In this manner, an apparatus for drying the residue coal mixture can be simplified, and the cost required for the drying can be reduced.
    Type: Application
    Filed: February 7, 2014
    Publication date: December 31, 2015
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Koji SAKAI, Noriyuki OKUYAMA, Takuya YOSHIDA, Shigeru KINOSHITA
  • Publication number: 20150013215
    Abstract: A method for separating solvent-containing water, which is generated in the process for producing an ashless coal, into a solvent and water readily without using any adsorbent or the like (a solvent separation method). The solvent separation method comprises: a solvent-containing water supply step of supplying the solvent-containing water into a pressure vessel for solvent separation purposes; and a temperature retention step of retaining the temperature of the solvent-containing water that has been supplied into the pressure vessel for solvent separation purposes at a predetermined temperature (e.g., 100 to 180 DEG C. inclusive). In the pressure vessel for solvent separation purposes, water in the liquid form moves downward and the solvent moves upward due to the difference between the density of water and the density of the solvent at the predetermined temperature. In this manner, the solvent-containing water can be separated into the solvent and water.
    Type: Application
    Filed: January 9, 2013
    Publication date: January 15, 2015
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Koji Sakai, Noriyuki Okuyama, Shigeru Kinoshita, Takuya Yoshida
  • Publication number: 20140325901
    Abstract: Provided is an ash-free coal production method without the need to once re-liquefy and form an ash-free coal. The ash-free coal production method includes an extraction step of mixing coal with a solvent to prepare a slurry and heating the slurry to extract a solvent-soluble coal component; a separation step of separating a solution containing the solvent-soluble coal component from the slurry obtained from the extraction step; an ash-free coal obtaining step of evaporatively separating the solvent from the solution separated in the separation step to obtain an ash-free coal. The ash-free coal obtaining step in the production method is performed so that the solvent is evaporatively separated from the solution to give a liquid ash-free coal, and the liquid ash-free coal is brought into contact with a solidifier (e.g., water) to solidify into a predetermined shape.
    Type: Application
    Filed: December 17, 2012
    Publication date: November 6, 2014
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Koji Sakai, Noriyuki Okuyama, Shigeru Kinoshita, Takuya Yoshida, Takahiro Shishido, Maki Hamaguchi
  • Publication number: 20140311024
    Abstract: Provided is a meted that controls and uniformizes fluidity of ash-free coal. The method includes the steps of obtaining an ash-free coal by removing a solvent from a solution containing a coal component dissolved therein (ash-free coal obtaining step (solvent recovering unit 8)); and mixing a plurality of coals of different types or components theme where the coals are capable of individually giving ash-free coals having different fluidities (mixing step (see reference signs B1 to B6)). The ash-free coal obtaining step (solvent recovering unit 8) obtains the ash-free coal by removing the solvent from the solution containing components of the coals which have been mixed.
    Type: Application
    Filed: December 7, 2012
    Publication date: October 23, 2014
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Koji Sakai, Takahiro Shishido, Noriyuki Okuyama, Maki Hamaguchi
  • Publication number: 20140305034
    Abstract: Provided is an ash-free coal production method that can produce an ash-free coal efficiently with a higher solvent recovery rate. The ash-free coal production method includes an extraction step of mixing coal with a solvent to give a slurry and heating the slurry to extract a solvent-soluble coal component; a separation step of separating a solution containing the coal component from the slurry containing the extracted coal component; and an ash-free coal obtaining step of separating and recovering the solvent from the separated solution to give an ash-free coal. The ash-free coal obtaining step includes a pressure-reducing substep of reducing a pressure to a level lower than the solvent vapor pressure to evaporatively separate the solvent from the solution to thereby give a solid ash-free coal; and a heating substep of heating the solid ash-free coal to evaporatively separate a residual solvent from the ash-free coal.
    Type: Application
    Filed: December 14, 2012
    Publication date: October 16, 2014
    Applicant: KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)
    Inventors: Koji Sakai, Noriyuki Okuyama, Shigeru Kinoshita, Takuya Yoshida