Patents by Inventor Kenichi Imagawa

Kenichi Imagawa 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).

  • Publication number: 20240055641
    Abstract: [Task] Provided is a proton conductor and a manufacturing method thereof that are suitable for the use in a temperature range between 200° C. and 600° C. [Solution] A proton conductor has electric conductivity of 0.01 S/cm or more at 300° C., wherein a portion of lithium ions of Li14?2xZn1+x(GeO4)4 is substituted with protons. The x is a number equal to or more than 0. 40% to 70% inclusive of movable lithium ions contained in Li14?2xZn1+x(GeO4)4 may be substituted with the protons. 50% to 60% inclusive of movable lithium ions contained in Li14?2xZn1+x as (GeO4)4 may be substituted with the protons. A manufacturing method of a proton conductor comprises a process of substituting a portion of lithium ions with protons by immersing Li14?2xZn1+x(GeO4)4 in a non-aqueous organic solvent containing acid.
    Type: Application
    Filed: August 12, 2021
    Publication date: February 15, 2024
    Inventors: Yoshimi OKADA, Takuo YASUNISHI, Kenichi IMAGAWA, Koichi EGUCHI, Toshiaki MATSUI, Hiroki MUROYAMA, Takashi OZEKI
  • Publication number: 20230356165
    Abstract: [Task] To avoid use of direct fire and suppress CO2 emission when heating a heat medium used to input heat to dehydrogenation reaction of hydrogenated aromatics.
    Type: Application
    Filed: April 16, 2021
    Publication date: November 9, 2023
    Inventors: Yoshimi OKADA, Kenichi IMAGAWA, Tomoyuki MIKURIYA, Hironori KAWAI, Yusuke NAKAJIMA
  • Publication number: 20230343978
    Abstract: Provided is an electrochemical cell, a power generation method using the electrochemical cell, and a manufacturing method of a hydrogen gas using the electrochemical cell that are suitable for the use in a temperature range between 200° C. and 600° C. A fuel cell 1 (electrochemical cell) includes a proton conductor 5 represented by (Li, H)14?2xZn1+x(GeO4)4 where a portion of lithium ions of Li14?2xZn1+x(GeO4)4 where x is a number equal to or more than 0 is substituted with protons, the proton conductor having electric conductivity of 0.01 S/cm or more at 300° C., an anode 6 provided on one side of the proton conductor, a cathode 7 provided on another side of the proton conductor, a first separator 9 provided on an anode side of the proton conductor to define an anode chamber 8, and a second separator 12 provided on a cathode side of the proton conductor to define a cathode chamber 11.
    Type: Application
    Filed: August 12, 2021
    Publication date: October 26, 2023
    Inventors: Yoshimi OKADA, Takuo YASUNISHI, Kenichi IMAGAWA, Daisuke KUROSAKI
  • Publication number: 20230338927
    Abstract: To provide a platinum-loaded alumina catalyst with an improved catalyst life. A platinum-loaded alumina catalyst includes an alumina carrier, and platinum loaded on the alumina carrier, wherein the alumina carrier includes a ?-alumina carrier having a surface area of 200 m2/g or more, a pore volume of 0.50 m2/g or more, an average pore diameter in a range of 60 to 150 ?, with pores having a pore diameter in a range of ±30 ? from the average pore diameter occupying 60% or more of a total pore volume, platinum particles are loaded on ?-alumina carrier in a range of 0.1 to 1.5% by weight calculated as elemental platinum (Pt), and 70% or more of the platinum particles have a size of 8 to 15 ? by direct observation using a transmission electron microscope.
    Type: Application
    Filed: April 16, 2021
    Publication date: October 26, 2023
    Inventors: Yoshimi OKADA, Kenichi IMAGAWA, Shinichi NAKATA
  • Publication number: 20230148027
    Abstract: To provide an egg shell-type platinum-loaded alumina catalyst demonstrating excellent performance in terms of catalyst life, an egg shell-type platinum-loaded alumina catalyst includes: an alumina carrier; platinum dispersed and loaded on an outer shell of the alumina carrier; and one or more second components selected from the group consisting of vanadium, chromium, molybdenum, and phosphorus. Preferably, the content of platinum is 0.05 to 5.0 wt % calculated as elemental platinum. The content of each second component preferably is 0.1 to 5.0 wt % calculated as each element. The alumina carrier has a surface area of 150 m2/g or more, a pore volume of 0.40 cm3/g or more, and an average pore diameter of 40 to 300 ?, with pores having a pore diameter in a range of ±30 ? from the average pore diameter occupying 60% or more of a total pore volume.
    Type: Application
    Filed: April 23, 2020
    Publication date: May 11, 2023
    Inventors: Yoshimi OKADA, Kenichi IMAGAWA, Masashi SAITO, Kenta FUKUDOME, Haruto KOBAYASHI
  • Publication number: 20230141512
    Abstract: To provide a uniform-type platinum-loaded alumina catalyst demonstrating excellent performance in terms of catalyst life, a uniform-type platinum-loaded alumina catalyst includes: an alumina carrier; sulfur or a sulfur compound dispersed over an entire cross section of the alumina carrier; platinum dispersed and loaded over the entire cross section of the alumina carrier; one or more alkali metals selected from the group consisting of sodium, potassium, and calcium. Preferably, the content of platinum is 0.05 to 5.0 wt % calculated as elemental platinum. The content of the sulfur or the sulfur compound preferably is 0.15 to 5.0 wt % calculated as elemental sulfur. The content of the alkali metal preferably is 0.1 to 5.0 wt % calculated as elemental alkali metal.
    Type: Application
    Filed: April 23, 2020
    Publication date: May 11, 2023
    Inventors: Yoshimi OKADA, Kenichi IMAGAWA, Masashi SAITO, Kenta FUKUDOME, Haruto KOBAYASHI
  • Patent number: 10745628
    Abstract: A hydrogenation catalyst with a small amount of supported metal that is excellent in stability and inhibition of side reactions is provided. The catalyst hydrogenates an aromatic hydrocarbon compound into an alicyclic hydrocarbon compound, and a Group X metal represented by nickel is supported in a composite support including at least alumina and titania. The composite support preferably includes at least an alumina substrate coated with titania. It is also preferable that the Group X metal is prereduced by hydrogen. In the case that the Group X metal is nickel, the nickel content is preferably 5-35 wt % as nickel oxide in the catalyst. The substrate includes, for example, a porous structure formed by a plurality of needle-shaped or column-shaped intertwined three-dimensionally.
    Type: Grant
    Filed: September 9, 2017
    Date of Patent: August 18, 2020
    Assignee: CHIYODA CORPORATION
    Inventors: Kenichi Imagawa, Haruto Kobayashi, Akihiro Muto, Shinichi Inoue
  • Patent number: 10131593
    Abstract: To reduce the emission of carbon dioxide and improve the energy efficiency in a hydrogen supply system. The hydrogen supply system (1) comprises: a reformer (5) for performing steam reforming of a hydrocarbon; a shift reaction unit (6) for producing a gas containing hydrogen and carbon dioxide by causing a water gas shift reaction of a gas obtained from the reformer; a first absorber (36) for absorbing the carbon dioxide contained in the gas obtained from the shift reaction unit in an absorption liquid; a hydrogenation reaction unit (8) for producing a hydrogenated aromatic compound by causing a hydrogenation reaction of an aromatic compound with a gas that has passed through the first absorber; and a regenerator (37) for separating the carbon dioxide from the absorption liquid by re-circulating the absorption liquid from the first absorber and heating the absorption liquid with heat generated from the hydrogenation reaction.
    Type: Grant
    Filed: August 5, 2014
    Date of Patent: November 20, 2018
    Assignee: CHIYODA CORPORATION
    Inventors: Yoshimi Okada, Tomohiko Shirasaki, Osamu Ikeda, Kenichi Imagawa, Hironori Kawai, Masato Shiraga, Tatsuo Ishiyama
  • Patent number: 10053363
    Abstract: To allow hydrogen to be supplied to a dehydrogenation reaction unit for dehydrogenating an organic hydride by using a highly simple structure so that the activity of the dehydrogenation catalyst of the dehydrogenation reaction unit is prevented from being rapidly reduced.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: August 21, 2018
    Assignee: CHIYODA CORPORATION
    Inventors: Tomoyuki Mikuriya, Kenichi Imagawa, Hironori Kawai, Yusuke Nakajima, Takenori Kanda
  • Patent number: 9919986
    Abstract: The energy is minimized that is required to lower the concentration of the high boiling point components (containing the poisoning substance for the dehydrogenation catalyst) contained in the hydrogenated aromatic compound produced by the hydrogenation of an aromatic compound. The hydrogenation system (2) for an aromatic compound comprises a hydrogenation reaction unit (11) for adding hydrogen to an aromatic compound by a hydrogenation reaction to produce a hydrogenated aromatic compound, a first separation unit (12) for separating a gas and a liquid component from a product of the hydrogenation reaction unit while maintaining a temperature of the product generally higher than a boiling point of the hydrogenated aromatic compound, and a second separation unit (13) for separating the hydrogenated aromatic compound from the gas component separated by the first separation unit.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: March 20, 2018
    Assignee: CHIYODA CORPORATION
    Inventors: Kenichi Imagawa, Hironori Kawai, Masato Shiraga, Yusuke Nakajima
  • Publication number: 20170369793
    Abstract: A hydrogenation catalyst with a small amount of supported metal that is excellent in stability and inhibition of side reactions is provided. The catalyst hydrogenates an aromatic hydrocarbon compound into an alicyclic hydrocarbon compound, and a Group X metal represented by nickel is supported in a composite support including at least alumina and titania. The composite support preferably includes at least an alumina substrate coated with titania. It is also preferable that the Group X metal is prereduced by hydrogen. In the case that the Group X metal is nickel, the nickel content is preferably 5-35 wt % as nickel oxide in the catalyst. The substrate includes, for example, a porous structure formed by a plurality of needle-shaped or column-shaped intertwined three-dimensionally.
    Type: Application
    Filed: September 9, 2017
    Publication date: December 28, 2017
    Applicant: CHIYODA CORPORATION
    Inventors: Kenichi IMAGAWA, Haruto KOBAYASHI, Akihiro MUTO, Shinichi INOUE
  • Publication number: 20170166496
    Abstract: The energy is minimized that is required to lower the concentration of the high boiling point components (containing the poisoning substance for the dehydrogenation catalyst) contained in the hydrogenated aromatic compound produced by the hydrogenation of an aromatic compound. The hydrogenation system (2) for an aromatic compound comprises a hydrogenation reaction unit (11) for adding hydrogen to an aromatic compound by a hydrogenation reaction to produce a hydrogenated aromatic compound, a first separation unit (12) for separating a gas and a liquid component from a product of the hydrogenation reaction unit while maintaining a temperature of the product generally higher than a boiling point of the hydrogenated aromatic compound, and a second separation unit (13) for separating the hydrogenated aromatic compound from the gas component separated by the first separation unit.
    Type: Application
    Filed: January 29, 2015
    Publication date: June 15, 2017
    Inventors: Kenichi Imagawa, Hironori Kawai, Masato Shiraga, Yusuke Nakajima
  • Publication number: 20170057890
    Abstract: In a system for hydrogenation of an aromatic compound, an excessive temperature rise in the hydrogenation reaction unit is prevented, and the amount of the dilution gas to be circulated is minimized. The hydrogenation system (1) comprises a hydrogenation reaction unit (2) for producing a hydrogenated aromatic compound by adding hydrogen to an aromatic compound via a hydrogenation reaction, a separation unit (3) for separating the hydrogenated aromatic compound from a product of the hydrogenation reaction unit, and a transportation unit (4) for circulating at least a part of a residual component remaining in the separation unit after separating the hydrogenated aromatic compound therefrom to the hydrogenation reaction unit.
    Type: Application
    Filed: February 20, 2015
    Publication date: March 2, 2017
    Inventors: Hironori Kawai, Masato Shiraga, Kenichi Imagawa, Tatsuo Ishiyama
  • Publication number: 20170015553
    Abstract: To allow hydrogen to be supplied to a dehydrogenation reaction unit for dehydrogenating an organic hydride by using a highly simple structure so that the activity of the dehydrogenation catalyst of the dehydrogenation reaction unit is prevented from being rapidly reduced.
    Type: Application
    Filed: March 6, 2015
    Publication date: January 19, 2017
    Inventors: Tomoyuki MIKURIYA, Kenichi IMAGAWA, Hironori KAWAI, Yusuke NAKAJIMA, Takenori KANDA
  • Publication number: 20160176784
    Abstract: To reduce the emission of carbon dioxide and improve the energy efficiency in a hydrogen supply system. The hydrogen supply system (1) comprises: a reformer (5) for performing steam reforming of a hydrocarbon; a shift reaction unit (6) for producing a gas containing hydrogen and carbon dioxide by causing a water gas shift reaction of a gas obtained from the reformer; a first absorber (36) for absorbing the carbon dioxide contained in the gas obtained from the shift reaction unit in an absorption liquid; a hydrogenation reaction unit (8) for producing a hydrogenated aromatic compound by causing a hydrogenation reaction of an aromatic compound with a gas that has passed through the first absorber; and a regenerator (37) for separating the carbon dioxide from the absorption liquid by re-circulating the absorption liquid from the first absorber and heating the absorption liquid with heat generated from the hydrogenation reaction.
    Type: Application
    Filed: August 5, 2014
    Publication date: June 23, 2016
    Inventors: Yoshimi Okada, Tomohiko Shirasaki, Osamu Ikeda, Kenichi Imagawa, Hironori Kawai, Masato Shiraga, Tatsuo Ishiyama
  • Patent number: 7888282
    Abstract: A catalyst for manufacturing synthesis gas has a carrier and a Group VIII metal carried by the carrier. The carrier contains a first ingredient, a second ingredient and a third ingredient. The first ingredient is an oxide of at least an alkaline earth metal selected from the group of magnesium, calcium, strontium and barium. The second ingredient is an oxide of at least an element selected from the group of scandium, yttrium and lanthanoids. The third ingredient is zirconia or a substance containing zirconia as principal ingredient and has a solid electrolytic property. The carrier may be formed by forming an overcoat film on a substrate by coating. Then, the overcoat film contains the above three ingredients. A catalyst according to the invention can remarkably reduce the dimensions of the reaction facility and improve the energy efficiency of the facility.
    Type: Grant
    Filed: December 8, 2004
    Date of Patent: February 15, 2011
    Assignee: Chiyoda Corporation
    Inventors: Takeshi Minami, Kenichi Imagawa, Atsuro Nagumo, Tetsuro Matsumura
  • Publication number: 20100056370
    Abstract: A catalyst carrier which includes a catalyst support layer containing an alkaline earth metal and/or an alkali metal disposed on an alumina substrate. The alkaline earth metal and/or the alkali metal is suppressed or prevented from diffusing into the substrate to react with alumina in the substrate. A catalyst support layer 3 that contains an alkaline earth metal and/or an alkali metal is formed on a surface of an alumina substrate 1 having a three-dimensional network structure. A zirconia layer 2 consisting of zirconia and/or stabilized zirconia is disposed between the substrate 1 and the catalyst support layer 3. The zirconia layer 2 has a thickness of 3 ?m or more in a region of at least 65% of the substrate surface. The zirconia layer suppresses or prevents the alkaline earth metal and/or the alkali metal in the catalyst support layer from diffusing into the substrate.
    Type: Application
    Filed: August 27, 2009
    Publication date: March 4, 2010
    Applicants: BRIDGESTONE CORPORATION, CHIYODA CORPORATION
    Inventors: Yasushige Shigyo, Tomohiro Yamamoto, Kenichi Imagawa, Takeshi Minami
  • Publication number: 20070129245
    Abstract: A catalyst for manufacturing synthesis gas has a carrier and a Group VIII metal carried by the carrier. The carrier contains a first ingredient, a second ingredient and a third ingredient. The first ingredient is an oxide of at least an alkaline earth metal selected from the group of magnesium, calcium, strontium and barium. The second ingredient is an oxide of at least an element selected from the group of scandium, yttrium and lanthanoids. The third ingredient is zirconia or a substance containing zirconia as principal ingredient and has a solid electrolytic property. The carrier may be formed by forming an overcoat film on a substrate by coating. Then, the overcoat film contains the above three ingredients. A catalyst according to the invention can remarkably reduce the dimensions of the reaction facility and improve the energy efficiency of the facility.
    Type: Application
    Filed: December 8, 2004
    Publication date: June 7, 2007
    Applicant: CHIYODA CORPORATION
    Inventors: Takeshi Minami, Kenichi Imagawa, Atsuro Nagumo, Tetsuro Matsumura
  • Patent number: 6218335
    Abstract: A porous spinel type oxide shows a large surface area and a uniform micro-porous structure. The oxide is expressed by general formula MO—Al2O3 and shows a surface area per unit weight of not less than 80 m2/g. Such a porous spinel type compound oxide is obtained by impregnating a specific &ggr;-alumina carrier with a solution of a compound of metal element M capable of taking a valence of 2, drying the impregnated carrier and calcining it at a temperature of 600° C. or higher. The specific &ggr;-alumina carrier shows a surface area per unit weight of not less than 150 m2/g, a micro-pore volume per unit weight of not less than 0.55 cm3/g and an average micro-pore diameter between 90 and 200 angstroms. The micro-pores with a diameter between 90 and 200 angstroms occupy not less than 60% of the total micro-pore volume of the carrier.
    Type: Grant
    Filed: July 23, 1999
    Date of Patent: April 17, 2001
    Assignee: Chiyoda Corporation
    Inventors: Yoshimi Okada, Kenichi Imagawa, Susumu Yamamoto
  • Patent number: 4804746
    Abstract: An antibody of a human leukemia virus-related peptide obtained by collecting an antibody produced in a mammal body by administering to the mammal an antigen prepared by reacting a human leukemia virus-related peptide selected from the group consisting of:(a) a peptide represented by formula (1):H-Tyr-Val-Glu-Pro-Thr-Ala-Pro-Gln-Val-Leu-H (1)(b) a peptide represented by formula (2): psR-Ile-Pro-His-Pro-Lys-Asn-Ser-Ile-Gly-Gly-Glu-Val-OH (2)wherein R is the same as defined above;(c) a peptide represented by formula (3):R-Thr-Trp-Thr-Pro-Lys-Asp-Lys-Thr-Lys-Val-Leu-OH (3)wherein R is the same as defined above;(d) a peptide represented by formula (4):H-Val-Val-Gln-Pro-Lys-Lys-Pro-Pro-Pro-Tyr-OH (4)(e) a peptide represented by formula (5):R-Met-Gly-Gln-Ile-Phe-Ser-Arg-Ser-Ala-Ser-Pro-OH (5)wherein R is the same as defined above; and(f) a peptide represented by formula (6):H-Tyr-Pro-Glu-Gly-Thr-Pro-Lys-Asp-Pro-Ile-Leu-Arg-Ser-Leu-OH (6)as a hapten, with a carrier in the presence of a haptencarrier binding agent.
    Type: Grant
    Filed: March 19, 1985
    Date of Patent: February 14, 1989
    Assignees: Japanese Foundation for Cancer Research, Otsuka Pharmaceutical Co., Ltd.
    Inventors: Mitsuaki Yoshida, Haruo Sugano, Fumio Shimizu, Kenichi Imagawa