Patents by Inventor Hironori Wakamatsu

Hironori Wakamatsu 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: 9352301
    Abstract: An exhaust gas purification catalyst contains a first catalyst in which an oxide of general formula (1): LaxM1-xM?O3-? (where La is lanthanum, M is at least one selected from a group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M? is at least one selected from a group consisting of iron (Fe), cobalt (Co), nickel (Ni) and manganese (Mn), ? is the amount of oxygen defect, and x and ? satisfy 0<x?1 and 0???1) is supported by an oxide capable of occluding and releasing oxygen, and a second catalyst containing a noble metal. The particle size of the oxide capable of occluding and releasing oxygen is within the range from 1 to 50 nm. The particle size of the oxide of the general formula (1) is within the range from 1 to 30 nm.
    Type: Grant
    Filed: July 18, 2013
    Date of Patent: May 31, 2016
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Junji Ito, Yasunari Hanaki, Tetsuro Naito, Misaki Akaishi, Hironori Wakamatsu
  • Patent number: 9101914
    Abstract: An exhaust gas purifying catalyst having a high purifying ability even if noble metal is not used as an essential component, an exhaust gas purifying monolith catalyst, and a method for manufacturing an exhaust gas purifying catalyst, are provided. The exhaust gas purifying catalyst includes an oxide having an oxygen storage and release capacity, and an oxide represented by the following formula (1) supported on the oxide having the oxygen storage and release capacity, LaxM1?xM?O3????(1) (wherein La represents lanthanum, M represents at least one element selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M? represents at least one element selected from the group consisting of iron (Fe), cobalt (Co), nickel (Ni) and manganese (Mn), ? represents an oxygen deficient amount, and x and ? fulfill conditions represented by 0<x?1 and 0???1, respectively).
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: August 11, 2015
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Junji Ito, Yasunari Hanaki, Tetsuro Naito, Misaki Akaishi, Hironori Wakamatsu
  • Publication number: 20150217275
    Abstract: An exhaust gas purification catalyst contains a first catalyst in which an oxide of general formula (1): LaxM1-xM?O3-? (where La is lanthanum, M is at least one selected from a group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M? is at least one selected from a group consisting of iron (Fe), cobalt (Co), nickel (Ni) and manganese (Mn), ? is the amount of oxygen defect, and x and ? satisfy 0<x?1 and 0???1) is supported by an oxide capable of occluding and releasing oxygen, and a second catalyst containing a noble metal. The particle size of the oxide capable of occluding and releasing oxygen is within the range from 1 to 50 nm. The particle size of the oxide of the general formula (1) is within the range from 1 to 30 nm.
    Type: Application
    Filed: July 18, 2013
    Publication date: August 6, 2015
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Junji Ito, Yasunari Hanaki, Tetsuro Naito, Misaki Akaishi, Hironori Wakamatsu
  • Patent number: 9080491
    Abstract: The present invention provides an exhaust gas purifying catalyst that can keep high catalytic performance even being subjected to exhaust gas. The exhaust gas purifying catalyst includes: noble metal particles (7); and supports (3), each support supporting the noble metal particles (7), wherein at least a certain amount of the noble metal particles (7) is provided on an outermost surface of the support (3), or provided within a range of 10% inside of a diameter of the support (3) from the outermost surface in a direction toward a center of the support.
    Type: Grant
    Filed: November 14, 2007
    Date of Patent: July 14, 2015
    Assignees: NISSAN MOTOR CO., LTD., RENAULT S.A.S. SOCIETE PAR ACTIONS SIMPLIFIEE
    Inventors: Masato Nagata, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga
  • Patent number: 9073044
    Abstract: An object is to maintain an effect of enhancing activity of noble metal particles by transition metal without increasing production cost and an environmental load. An exhaust gas purifying catalyst 1 is composed of: noble metal particles 2; first compounds 3 which contact the noble metal particles 2 and suppress movement of the noble metal particles 2; and second compounds 4 which contain the noble metal particles 2 and the first compounds 3, suppress the movement of the noble metal particles 2, and suppress coagulation of the first compounds 3 following mutual contact of the first compounds 3, wherein the first compounds 3 support the noble metal particles 2, and simplexes or aggregates of the first compounds 3 supporting the noble metal particles 2 are included in section partitioned by the second compounds 4.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: July 7, 2015
    Assignees: NISSAN MOTOR CO., LTD., RENAULT S.A.S.
    Inventors: Masanori Nakamura, Katsuo Suga, Hironori Wakamatsu, Kazuyuki Shiratori, Hirofumi Yasuda, Makoto Aoyama, Jun Ikezawa
  • Patent number: 8877675
    Abstract: An exhaust gas purifying catalyst includes: a catalyst particle unit having at least noble metal with a catalytic function, first oxides on which the catalyst noble metal is supported, and second oxides covering the first oxides on which the noble metal is supported. In catalyst powder formed of an aggregate of plural pieces of the catalyst particle units, at least one type of compounds selected from the group consisting of a transition element, an alkali earth metal element, an alkali metal element, and a rare earth element, which is a promoter component, are contained.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: November 4, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masanori Nakamura, Hironori Wakamatsu, Tetsuro Naito, Katsuo Suga, Hiroto Kikuchi, Kazuyuki Shiratori
  • Publication number: 20140018235
    Abstract: An exhaust gas purifying catalyst having a high purifying ability even if noble metal is not used as an essential component, an exhaust gas purifying monolith catalyst, and a method for manufacturing an exhaust gas purifying catalyst, are provided. The exhaust gas purifying catalyst includes an oxide having an oxygen storage and release capacity, and an oxide represented by the following formula (1) supported on the oxide having the oxygen storage and release capacity, LaxM1-xM?O3-???(1) (wherein La represents lanthanum, M represents at least one element selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M? represents at least one element selected from the group consisting of iron (Fe), cobalt (Co), nickel (Ni) and manganese (Mn), ? represents an oxygen deficient amount, and x and ? fulfill conditions represented by 0<x?1 and 0???1, respectively).
    Type: Application
    Filed: March 28, 2012
    Publication date: January 16, 2014
    Inventors: Junji Ito, Yasunari Hanaki, Tetsuro Naito, Misaki Akaishi, Hironori Wakamatsu
  • Patent number: 8609578
    Abstract: An exhaust gas purifying catalyst is constituted by: noble metal particles (1); first compounds (2) which support the noble metal particles (1); second compounds (3) different in type from the first compounds (2); and oxides (4) which surround the noble metal particles (1), the first compounds (2) and the second compounds (3). A median diameter of the first compounds (2) and a median diameter of the second compounds (3) satisfy a relationship of a following inequality: median diameter of first compounds<median diameter of second compounds.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: December 17, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masanori Nakamura, Yoshiaki Hiramoto, Hiroto Kikuchi, Hironori Wakamatsu, Kazuyuki Shiratori, Tetsuro Naito, Katsuo Suga
  • Patent number: 8569201
    Abstract: An exhaust gas purifying catalyst includes: rhodium; a zirconium-containing oxide which supports rhodium, and comprises: at least one element selected from the group consisting of calcium, lanthanum, cerium, neodymium and yttrium; and zirconium; and a NOx absorbing material comprising at least one selected from the group consisting of magnesium, barium, sodium, potassium and cesium. A degree of dispersion of rhodium is 20% or more after baking at 900° C. in air for three hours. A method for manufacturing the exhaust gas purifying catalyst includes: mixing the zirconium-containing oxide with water, thereby preparing an aqueous liquid of the zirconium-containing oxide; and supporting rhodium on the zirconium-containing oxide by mixing the aqueous liquid of the zirconium-containing oxide with an aqueous solution of a rhodium salt. A pH of a mixed liquid of the aqueous solution of the rhodium salt and the aqueous liquid of the zirconium-containing oxide is adjusted to 7 or more.
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: October 29, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tetsuro Naito, Masanori Nakamura, Hironori Wakamatsu
  • Patent number: 8486853
    Abstract: An exhaust gas purifying catalyst (1) according to the present invention includes noble metal particles (6), a first compound (7) supporting the noble metal particles (6), and a second compound (9) disposed not in contact with the noble metal particles (6) and having an oxygen storage capacity. An average distance between the first compound (7) and the second compound (9) is between 5 nm and 300 nm.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: July 16, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kazuyuki Shiratori, Katsuo Suga, Masanori Nakamura, Hironori Wakamatsu, Hiroto Kikuchi, Tetsuro Naito, Jun Ikezawa
  • Publication number: 20130157844
    Abstract: An object is to maintain an effect of enhancing activity of noble metal particles by transition metal without increasing production cost and an environmental load. An exhaust gas purifying catalyst 1 is composed of: noble metal particles 2; first compounds 3 which contact the noble metal particles 2 and suppress movement of the noble metal particles 2; and second compounds 4 which contain the noble metal particles 2 and the first compounds 3, suppress the movement of the noble metal particles 2, and suppress coagulation of the first compounds 3 following mutual contact of the first compounds 3, wherein the first compounds 3 support the noble metal particles 2, and simplexes or aggregates of the first compounds 3 supporting the noble metal particles 2 are included in section partitioned by the second compounds 4.
    Type: Application
    Filed: February 19, 2013
    Publication date: June 20, 2013
    Inventors: Masanori NAKAMURA, Katsuo Suga, Hironori Wakamatsu, Kazuyuki Shiratori, Hirofumi Yasuda, Makoto Aoyama, Jun Ikezawa
  • Patent number: 8455390
    Abstract: An exhaust gas purifying catalyst includes a monolithic substrate (2), and a transition metal oxide layer (3) formed in the monolithic substrate (2). The transition metal oxide layer (3) contains transition metal oxide powder including: transition metal oxide particles (10); a first compound (20) on which the transition metal oxide particles (10) are supported; and a second compound (30) that surrounds a single body or an aggregate of the transition metal oxide particles (10) and the first compound (20).
    Type: Grant
    Filed: June 23, 2009
    Date of Patent: June 4, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroto Kikuchi, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga, Toshiharu Miyamura, Jun Ikezawa, Tetsuro Naito, Junji Ito
  • Patent number: 8404611
    Abstract: An object is to maintain an effect of enhancing activity of noble metal particles by transition metal without increasing production cost and an environmental load. An exhaust gas purifying catalyst 1 is composed of: noble metal particles 2; first compounds 3 which contact the noble metal particles 2 and suppress movement of the noble metal particles 2; and second compounds 4 which contain the noble metal particles 2 and the first compounds 3, suppress the movement of the noble metal particles 2, and suppress coagulation of the first compounds 3 following mutual contact of the first compounds 3, wherein the first compounds 3 support the noble metal particles 2, and simplexes or aggregates of the first compounds 3 supporting the noble metal particles 2 are included in section partitioned by the second compounds 4.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: March 26, 2013
    Assignees: Nissan Motor Co., Ltd., Renault S.A.S.
    Inventors: Masanori Nakamura, Katsuo Suga, Hironori Wakamatsu, Kazuyuki Shiratori, Hirofumi Yasuda, Makoto Aoyama, Jun Ikezawa
  • Publication number: 20130056092
    Abstract: The present invention concerns a coating apparatus including a coating unit for applying a slurry-like kneaded electrode material prepared by kneading an electrode material and a solvent, a pump for feeding the kneaded electrode material under pressure to the coating unit, and a temperature raising unit for raising the temperature of the kneaded electrode material before coating to a predetermined temperature range where a storage modulus of the kneaded electrode material becomes substantially constant. This enables stable coating in an early stage after the start of coating.
    Type: Application
    Filed: May 16, 2011
    Publication date: March 7, 2013
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Hironori Wakamatsu, Tomoyuki Natsume
  • Publication number: 20120322652
    Abstract: An exhaust gas purifying catalyst includes: rhodium; a zirconium-containing oxide which supports rhodium, and comprises: at least one element selected from the group consisting of calcium, lanthanum, cerium, neodymium and yttrium; and zirconium; and a NOx absorbing material comprising at least one selected from the group consisting of magnesium, barium, sodium, potassium and cesium. A degree of dispersion of rhodium is 20% or more after baking at 900° C. in air for three hours. A method for manufacturing the exhaust gas purifying catalyst includes: mixing the zirconium-containing oxide with water, thereby preparing an aqueous liquid of the zirconium-containing oxide; and supporting rhodium on the zirconium-containing oxide by mixing the aqueous liquid of the zirconium-containing oxide with an aqueous solution of a rhodium salt. A pH of a mixed liquid of the aqueous solution of the rhodium salt and the aqueous liquid of the zirconium-containing oxide is adjusted to 7 or more.
    Type: Application
    Filed: August 23, 2012
    Publication date: December 20, 2012
    Inventors: Tetsuro Naito, Masanori Nakamura, Hironori Wakamatsu
  • Patent number: 8309487
    Abstract: An exhaust gas purifying catalyst (1) is composed of: a noble metal (2); a first compound (3); and a second compound (4). The noble metal (2) is supported on the first compound (3). The exhaust gas purifying catalyst (1) includes units having a structure in which the first compound (3) supporting the noble metal (2) is surrounded by the second compound (4), and the first compound (3) supporting the noble metal (2) is isolated from one another by the second compound (4). The noble metal (2) is one or more selected from [Pt, Pd and Rh], the first compound (3) contains Ti as a main component, and the second compound (4) contains, as a main component, one or more selected from [Al and Si].
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: November 13, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Kazuyuki Shiratori, Masanori Nakamura, Hironori Wakamatsu, Katsuo Suga
  • Patent number: 8273681
    Abstract: An exhaust gas purifying catalyst includes: rhodium; a zirconium-containing oxide which supports rhodium, and comprises: at least one element selected from the group consisting of calcium, lanthanum, cerium, neodymium and yttrium; and zirconium; and a NOx absorbing material comprising at least one selected from the group consisting of magnesium, barium, sodium, potassium and cesium. A degree of dispersion of rhodium is 20% or more after baking at 900° C. in air for three hours. A method for manufacturing the exhaust gas purifying catalyst includes: mixing the zirconium-containing oxide with water, thereby preparing an aqueous liquid of the zirconium-containing oxide; and supporting rhodium on the zirconium-containing oxide by mixing the aqueous liquid of the zirconium-containing oxide with an aqueous solution of a rhodium salt. A pH of a mixed liquid of the aqueous solution of the rhodium salt and the aqueous liquid of the zirconium-containing oxide is adjusted to 7 or more.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: September 25, 2012
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Tetsuro Naito, Masanori Nakamura, Hironori Wakamatsu
  • Patent number: 8158554
    Abstract: A high heat-resistant catalyst includes: noble metal particles; first compounds which contact the noble metal particles and suppress movement of the noble metal particles; and second compounds which envelop the noble metal particles and the first compounds, suppress the movement of the noble metal particles, and suppress coagulation of the first compounds following mutual contact of the first compounds. The first compounds support the noble metal particles, and single piece or aggregate of the first compounds supporting the noble metal particles are included in a section partitioned by the second compounds. A coefficient of linear thermal expansion of the second compounds is 1.2×10?5 [K?1] or less.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: April 17, 2012
    Assignees: Nissan Motor Co., Ltd., RENAULT s.a.s.
    Inventors: Hironori Wakamatsu, Masanori Nakamura, Masahiro Takaya, Katsuo Suga, Hiroto Kikuchi, Jun Ikezawa
  • Publication number: 20120053050
    Abstract: An exhaust gas purifying catalyst (1) according to the present invention includes noble metal particles (6), a first compound (7) supporting the noble metal particles (6), and a second compound (9) disposed not in contact with the noble metal particles (6) and having an oxygen storage capacity. An average distance between the first compound (7) and the second compound (9) is between 5 nm and 300 nm.
    Type: Application
    Filed: March 4, 2010
    Publication date: March 1, 2012
    Inventors: Kazuyuki Shiratori, Katsuo Suga, Masanori Nakamura, Hironori Wakamatsu, Hiroto Kikuchi, Tetsuro Naito, Jun Ikezawa
  • Publication number: 20110177939
    Abstract: An exhaust gas purifying catalyst is constituted by: noble metal particles (1); first compounds (2) which support the noble metal particles (1); second compounds (3) different in type from the first compounds (2); and oxides (4) which surround the noble metal particles (1), the first compounds (2) and the second compounds (3). A median diameter of the first compounds (2) and a median diameter of the second compounds (3) satisfy a relationship of a following inequality: median diameter of first compounds<median diameter of second compounds.
    Type: Application
    Filed: June 30, 2009
    Publication date: July 21, 2011
    Inventors: Masanori Nakamura, Yoshiaki Hiramoto, Hiroto Kikuchi, Hironori Wakamatsu, Kazuyuki Shiratori, Tetsuro Naito, Katsuo Suga