Patents by Inventor Motoi Tanaka

Motoi Tanaka 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: 20220139586
    Abstract: As an organic iodine remover that removes organic iodine in a containment vessel of a nuclear reactor, an organic agent (for example, an ionic liquid, an interfacial active agent, a quaternary salt, or a phase transfer catalyst) having a function of dissolving and decomposing the organic iodine and retaining iodine is used. The organic iodine remover is a substance composed of a cation and an anion. The organic iodine remover is, in particular, an organic iodine remover in which, in a structure of the cation of the organic agent, carbon or oxygen is bonded to, via a single bond, to a phosphorus element, a sulfur element or a nitrogen element, the number of carbon chains is 2 or more, and an anionic structure is configured with a substance with high nucleophilicity. By using such an organic agent, the organic iodine is removed with an efficiency of 99% or more.
    Type: Application
    Filed: January 21, 2020
    Publication date: May 5, 2022
    Inventors: Sohei FUKUI, Motoi TANAKA, Masaaki TANAKA, Fumio TOTSUKA, Tomoharu HASHIMOTO, Kazuo TOMINAGA
  • Publication number: 20220139587
    Abstract: To provide an iodine trapping apparatus capable of trapping organic iodine in a wide temperature range with high efficiency. The iodine trapping apparatus includes a first trapping agent 2 capable of trapping organic iodine in a gas in a nuclear power structure main body. The first trapping agent 2 contains a generating and trapping component which generates an iodide ion (I?) from organic iodine (RI) and traps the generated iodide ion, and a generating component which is different from the generating and trapping component, generates an iodide ion from the organic iodine at least at 100° C. to 130° C., and traps the generated iodide ion in the generating and trapping component.
    Type: Application
    Filed: October 27, 2021
    Publication date: May 5, 2022
    Inventors: Sohei FUKUI, Kazushige ISHIDA, Tsuyoshi ITO, Kazuo TOMINAGA, Motoi TANAKA, Masaaki TANAKA
  • Publication number: 20220051813
    Abstract: An organic iodine trapping apparatus and method efficiently traps organic iodine in a nuclear reactor container vessel. A liquid vessel contains a non-volatile liquid (e.g., ionic liquid or interfacial active agent solution) capable of decomposing organic iodine. An introduction pipe introduces a fluid containing organic iodine in the nuclear reactor container vessel to the non-volatile liquid. The non-volatile liquid is heated by heat in the nuclear reactor container vessel or reaction heat of the fluid in the nuclear reactor container vessel. Then, the trapping apparatus decomposes and traps the organic iodine. The organic iodine trapping method includes heating a non-volatile liquid capable of decomposing organic iodine by heat in the nuclear reactor container vessel or reaction heat of fluid in the nuclear reactor container vessel; making the fluid containing organic iodine pass through the heated non-volatile liquid; and decomposing and trapping the organic iodine in the non-volatile liquid.
    Type: Application
    Filed: November 12, 2019
    Publication date: February 17, 2022
    Inventors: Sohei FUKUI, Motoi TANAKA, Masaaki TANAKA, Fumio TOTSUKA, Tomoharu HASHIMOTO, Kazuo TOMINAGA
  • Publication number: 20210316248
    Abstract: There is provided an organic iodine trapping apparatus that can efficiently trap an organic iodine without using complicated or large equipment. An organic iodine trapping apparatus 30 is an apparatus that traps an organic iodine, including: a trapping vessel 1 through which gas containing an organic iodine is passed; an organic iodine remover 2 (Example: trihexyl (tetradecyl) phosphonium chloride, or the like) that is disposed in or injected into the trapping vessel 1 and decomposes the organic iodine; and a trapping material 3 that is disposed in or injected into the trapping vessel 1 and traps iodine ions generated by decomposition of the organic iodine, in which the trapping material 3 is a metal (Example: silver or the like) or a metal compound (Example: silver chloride, silver oxide, or the like).
    Type: Application
    Filed: April 6, 2021
    Publication date: October 14, 2021
    Inventors: Sohei FUKUI, Kazushige ISHIDA, Kazuo TOMINAGA, Motoi TANAKA, Tomoharu HASHIMOTO
  • Publication number: 20210130689
    Abstract: A phosphor including a fired product having a composition represented by general formula M1aM2bM3cAl3N4-dOd, wherein M1 is one or more elements selected from Sr, Mg, Ca, and Ba, M2 is one or more elements selected from Li, Na, and K, and M3 is one or more elements selected from Eu, Ce, and Mn, and wherein a, b, c, and d satisfy each of the following formulas: 0.850?a?1.150, 0.850?b?1.150, 0.001?c?0.010, 0.10<d?0.20, and 0.09?d/(a+d)<0.20.
    Type: Application
    Filed: March 14, 2019
    Publication date: May 6, 2021
    Applicant: Denka Company Limited
    Inventors: Masato AKABANE, Ryo YOSHIMATU, Hiroaki TOYOSHIMA, Motoi TANAKA
  • Patent number: 10759995
    Abstract: The present invention relates to a process for producing a composite-fluoride fluorescent material represented by the general formula A2MF6:Mn4+ (wherein A is at least one alkali metal element including K; M is one or more metallic elements including at least Si or Ge and selected from among Si, Ge, Sn, Ti, Zr, and Hf; F is fluorine; and Mn is manganese). With the production process, it is possible to obtain a fluorescent material which is high in absorptance, internal quantum efficiency, and external quantum efficiency and has excellent optical properties.
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: September 1, 2020
    Assignee: DENKA COMPANY LIMITED
    Inventors: Masayoshi Ichikawa, Ryosuke Kondo, Hideyuki Emoto, Motoi Tanaka
  • Patent number: 10611956
    Abstract: Provided is a phosphor represented by the general formula: A2MF6:Mn. The elements A each represents an alkali metal element, the element M represents one or more tetravalent metallic elements selected from Si, Ge, Sn, Ti, Zr and Hf. The phosphor has a minimal light absorption rate in a wavelength range of 300 nm or more and 350 nm or less of 67% or less, and a maximum light absorption rate in a wavelength range of 400 nm or more and 500 nm or less of 65% or more. The phosphor has a Mn content of 0.3% by mass or more and 1.5% by mass or less.
    Type: Grant
    Filed: January 27, 2016
    Date of Patent: April 7, 2020
    Assignee: Denka Company Limited
    Inventors: Hideyuki Emoto, Motoi Tanaka, Kazuhiro Ito
  • Publication number: 20180086973
    Abstract: Provided is a phosphor that emits red light, is represented by the general formula, A2MF6:Mn, and exhibits little reduction in intensity even when exposed to a high-temperature, high-humidity atmosphere over a long period of time. Also provided is a light-emitting device using said phosphor. The present invention is a phosphor in which the main crystal phase thereof is represented by the general formula, A2MF6:Mn. The element A is an alkali metal element including at least K, and the element M is one or more tetravalent elements selected from the group consisting of Si, Ge, Sn, Ti, Zr, and Hf. The phosphor has a coating layer on the surface thereof. The coating layer is a hydrophobic organic substance having a hydrophobicity of 10% or more.
    Type: Application
    Filed: January 19, 2016
    Publication date: March 29, 2018
    Inventors: Ryosuke KONDO, Masayoshi ICHIKAWA, Hideyuki EMOTO, Motoi TANAKA
  • Publication number: 20180072946
    Abstract: Provided is a phosphor represented by the general formula: A2MF6:Mn. The elements A each represents an alkali metal element, the element M represents one or more tetravalent metallic elements selected from Si, Ge, Sn, Ti, Zr and Hf. The phosphor has a minimal light absorption rate in a wavelength range of 300 nm or more and 350 nm or less of 67% or less, and a maximum light absorption rate in a wavelength range of 400 nm or more and 500 nm or less of 65% or more. The phosphor has a Mn content of 0.3% by mass or more and 1.5% by mass or less.
    Type: Application
    Filed: January 27, 2016
    Publication date: March 15, 2018
    Inventors: Hideyuki EMOTO, Motoi TANAKA, Kazuhiro ITO
  • Publication number: 20180016494
    Abstract: The present invention relates to a process for producing a composite-fluoride fluorescent material represented by the general formula A2MF6:Mn4+ (wherein A is at least one alkali metal element including K; M is one or more metallic elements including at least Si or Ge and selected from among Si, Ge, Sn, Ti, Zr, and Hf; F is fluorine; and Mn is manganese). With the production process, it is possible to obtain a fluorescent material which is high in absorptance, internal quantum efficiency, and external quantum efficiency and has excellent optical properties.
    Type: Application
    Filed: February 17, 2016
    Publication date: January 18, 2018
    Inventors: Masayoshi Ichikawa, Ryosuke Kondo, Hideyuki Emoto, Motoi Tanaka