Patents by Inventor Seiji Takubo

Seiji Takubo 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: 20200172456
    Abstract: An object of the present invention is to provide a composition containing fluoromethane having high purity. A method for producing fluoromethane, comprising: pyrolyzing in a gas phase a fluorine-containing methyl ether represented by Formula (1): wherein R1 and R2 are the same or different, and each represents an optionally substituted linear or branched monovalent aliphatic hydrocarbon group, an optionally substituted monovalent aromatic hydrocarbon group, an optionally substituted monovalent cyclic aliphatic hydrocarbon group, hydrogen, or halogen, in the presence of an alumina catalyst to thereby obtain a mixed gas containing fluoromethane and acid fluoride, wherein: the alumina catalyst contains chlorine in an amount of 1.0 wt % or less.
    Type: Application
    Filed: February 7, 2020
    Publication date: June 4, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shingo NAKAMURA, Yuusuke ETOU, Seiji TAKUBO, Katsuya NAKAI
  • Patent number: 10597343
    Abstract: An object of the present invention is to provide a composition containing fluoromethane having high purity. A method for producing fluoromethane, comprising: pyrolyzing in a gas phase a fluorine-containing methyl ether represented by Formula (1): wherein R1 and R2 are the same or different, and each represents an optionally substituted linear or branched monovalent aliphatic hydrocarbon group, an optionally substituted monovalent aromatic hydrocarbon group, an optionally substituted monovalent cyclic aliphatic hydrocarbon group, hydrogen, or halogen, in the presence of an alumina catalyst to thereby obtain a mixed gas containing fluoromethane and acid fluoride, wherein: the alumina catalyst contains chlorine in an amount of 1.0 wt % or less.
    Type: Grant
    Filed: June 3, 2016
    Date of Patent: March 24, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Shingo Nakamura, Yuusuke Etou, Seiji Takubo, Katsuya Nakai
  • Publication number: 20180141886
    Abstract: An object of the present invention is to provide a composition containing fluoromethane having high purity. A method for producing fluoromethane, comprising: pyrolyzing in a gas phase a fluorine-containing methyl ether represented by Formula (1): wherein R1 and R2 are the same or different, and each represents an optionally substituted linear or branched monovalent aliphatic hydrocarbon group, an optionally substituted monovalent aromatic hydrocarbon group, an optionally substituted monovalent cyclic aliphatic hydrocarbon group, hydrogen, or halogen, in the presence of an alumina catalyst to thereby obtain a mixed gas containing fluoromethane and acid fluoride, wherein: the alumina catalyst contains chlorine in an amount of 1.0 wt % or less.
    Type: Application
    Filed: June 3, 2016
    Publication date: May 24, 2018
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shingo NAKAMURA, Yuusuke ETOU, Seiji TAKUBO, Katsuya NAKAI
  • Publication number: 20130177491
    Abstract: Provided is a method for producing phosphorus pentafluoride comprising reacting phosphorus trihalide represented by Formula: PX3, wherein X represents F, Cl or Br, with gas-phase molecular halogen and hydrogen fluoride. The method of the present invention makes it possible to efficiently produce phosphorus pentafluoride at low cost on an industrial scale.
    Type: Application
    Filed: October 12, 2011
    Publication date: July 11, 2013
    Inventors: Atsushi Suzuki, Seiji Takubo
  • Patent number: 7592484
    Abstract: The present invention relates to a method for producing carbonyl difluoride comprising a step of reacting trifluoromethane with oxygen or an oxygen-containing gas while heating.
    Type: Grant
    Filed: April 26, 2005
    Date of Patent: September 22, 2009
    Assignee: Daikin Industries, Ltd.
    Inventors: Seiji Takubo, Takuji Kume, Akinori Yamamoto, Chie Sawauchi, Hisako Nakamura
  • Publication number: 20080021243
    Abstract: The present invention relates to a method for producing carbonyl difluoride comprising a step of reacting trifluoromethane with oxygen or an oxygen-containing gas while heating.
    Type: Application
    Filed: April 26, 2005
    Publication date: January 24, 2008
    Applicant: DAIKIN INDUSTRIES, LTD.,
    Inventors: Seiji Takubo, Takuji Kume, Akinori Yamamoto, Chie Sawauchi, Hisako Nakamura
  • Patent number: 7182363
    Abstract: A stroller comprises a main structure provided with a handle including a pair of back pipes, a body structure, and a seat. The body structure includes a back part, and a pair of side parts extending from a right and a left side of the back part, and is formed of a cushioning material. The stroller includes a support sheet for supporting the body structure on the main structure, and a reclining mechanism for adjusting inclination of the body structure relative to the seat. The side parts are connected to corresponding back pipes by connecting flaps formed of a flexible material.
    Type: Grant
    Filed: January 6, 2004
    Date of Patent: February 27, 2007
    Assignee: Combi Corporation
    Inventors: Seiji Takubo, Hiroko Kurosu, Kentaro Moriguchi
  • Patent number: 6846963
    Abstract: In a process for producing 1,1,1,3,3-pentafluoropropane which has a liquid-phase reaction step for fluorination of 1,1,1,3,3-pentahalopropane (wherein at least one of halogen atoms is not fluorine) with HF in the presence of antimony pentahalide catalyst in a reactor to obtain a reaction mixture comprising 1,1,1,3,3-pentafluoropropane and the antimony pentahalide catalyst, the fluorination is conducted at a reaction temperature less than 50° C.
    Type: Grant
    Filed: February 11, 2004
    Date of Patent: January 25, 2005
    Assignee: Daikin Industries, Ltd.
    Inventors: Tatsuo Nakada, Seiji Takubo, Toshikazu Yoshimura, Takashi Shibanuma
  • Publication number: 20040162451
    Abstract: In a process for producing 1,1,1,3,3-pentafluoropropane which has a liquid-phase reaction step for fluorination of 1,1,1,3,3-pentahalopropane (wherein at least one of halogen atoms is not fluorine) with HF in the presence of antimony pentahalide catalyst in a reactor to obtain a reaction mixture comprising 1,1,1,3,3-pentafluoropropane and the antimony pentahalide catalyst, the fluorination is conducted at a reaction temperature less than 50° C.
    Type: Application
    Filed: February 11, 2004
    Publication date: August 19, 2004
    Applicant: Daikin Industries, Ltd.
    Inventors: Tatsuo Nakada, Seiji Takubo, Toshikazu Yoshimura, Takashi Shibanuma
  • Publication number: 20040140648
    Abstract: A stroller 10 comprises a main structure 12 provided with a handle 26 including a pair of back pipes 30, a body structure 14, and a seat 16. The body structure 14 includes a back part 40, and a pair of side parts 42 extending from the right and the left side of the back part 40, and is formed of a cushioning material. The stroller 10 includes a support sheet 18 for supporting the body structure 14 on the main structure 12, and a reclining mechanism 10 for adjusting the inclination of the body structure 14 relative to the seat 16. The pair of side parts 42 are connected to the corresponding back pipes 30 by connecting flaps 46 formed of a flexible material.
    Type: Application
    Filed: January 6, 2004
    Publication date: July 22, 2004
    Inventors: Seiji Takubo, Hiroko Kurosu, Kentaro Moriguchi
  • Patent number: 6521802
    Abstract: The present invention provides a process for preparing a fluorine-containing halogenated hydrocarbon compound by fluorinating, in a reaction field where an antimony halide compound represented by the general formula: SbClpF5−p  (I) wherein p is a value within a range from 0 to 2, and hydrogen fluoride and a halogenated hydrocarbon compound as a raw material exist, the halogenated hydrocarbon compound in a molar ratio of the antimony halide compound to hydrogen fluoride within a range from 40/60 to 90/10. According to this process, a fluorine-containing halogenated hydrocarbon compound (HFC), which is important as a substitute compound of CFC or HCFC, can be prepared economically advantageously with good selectivity while suppressing a corrosive action of a reaction vessel.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: February 18, 2003
    Assignee: Daikin Industries, Ltd.
    Inventors: Seiji Takubo, Noriaki Shibata, Tatsuo Nakada, Takashi Shibanuma
  • Patent number: 5763705
    Abstract: There are provided production methods of 1,1,1,3,3-pentafluoropropane characterized in that 1,1,1,3,3-pentafluoro-2,3-dichloropropane is reacted with hydrogen fluoride in the presence of a noble metal catalyst; of 1,1,1,3,3-pentafluoro-2-halogeno-3-chloropropane characterized in that the halogenated propene indicated as general formula I is fluorinated in the presence of antimony trihalogenide and/or antimony pentahalogenide by hydrogen fluoride of mole ratio of or over five times the said antimony halogenide in a liquid phase; and of 1,1,1,2,3,3-hexachloropropene characterized in that 1,1,1,2,2,3,3-heptachloropropane is reacted with an aqueous solution of alkali metal hydroxide in the presence of a phase transfer catalyst. Therefore, an industrial manufacturing method which is possible to obtain the objective product easily at low cost and high yield can be provided.
    Type: Grant
    Filed: March 10, 1997
    Date of Patent: June 9, 1998
    Assignee: Daikin Industries Ltd.
    Inventors: Seiji Takubo, Hirokazu Aoyama, Tatsuo Nakada
  • Patent number: 5714655
    Abstract: 2,2,3-trichloro-1,1,1,3,3-pentafluoropropane is used as a raw material, to which not less than 4.5 equivalent parts of hydrogen are added to effect a hydrogenation reaction in the presence of a noble metal catalyst, particularly a palladium catalyst, by the vapor phase method to manufacture 1,1,1,3,3-pentafluoropropane. Further, propane, propene, and hexachloropropene, etc. are chlorofluorinated in the presence of a metal catalyst to produce 2,2,3-trichloro-1,1,1,3,3-pentafluoropropane, then this compound is reduced with hydrogen in the presence of a noble metal catalyst to produce 1,1,1,3,3-pentafluoropropane. 2,2,3-trichloro-1,1,1,3,3-pentafluoropropane and 1,1,1,3,3-pentafluoropropane can thus be efficiently and economically produced.
    Type: Grant
    Filed: December 8, 1995
    Date of Patent: February 3, 1998
    Assignee: Daikin Industries, Ltd.
    Inventors: Akinori Yamamoto, Eiji Seki, Hirokazu Aoyama, Seiji Takubo, Tatsuo Nakada
  • Patent number: 5659093
    Abstract: There are provided production methods of 1,1,1,3,3-pentafluoropropane characterized in that 1,1,1,3,3-pentafluoro-2,3-dichloropropane is reacted with hydrogen fluoride in the presence of a noble metal catalyst; of 1,1,1,3,3-pentafluoro-2-halogeno-3-chloropropane characterized in that the halogenated propene indicated as general formula I is fluorinated in the presence of antimony trihalogenide and/or antimony pentahalogenide by hydrogen fluoride of mole ratio of or over five times the said antimony halogenide in a liquid phase; and of 1,1,1,2,3,3-hexaohloropropene characterized in that 1,1,1,2,2,3,3-heptachloropropane is reacted with an aqueous solution of alkali metal hydroxide in the presence of a phase transfer catalyst. Therefore, an industrial manufacturing method which is possible to obtain the objective product easily at low cost and high yield can be provided.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: August 19, 1997
    Assignee: Daikin Industries Ltd.
    Inventors: Seiji Takubo, Hirokazu Aoyama, Tatsuo Nakada
  • Patent number: 5608128
    Abstract: The present invention provides a production method of obtaining the mixture of 1,1,1,4,4,4-hexafluoro-2,3-dichloro-2-butene, 1,1,1,4,4,4-hexafluoro-2-chloro-2-butene and 1,1,1,4,4,4-hexafluoro-2-butene (1,1,1,4,4,4-hexafluoro-2-butene compounds) by reacting at least one of butane, butene and butadiene with chlorine and HF in the presence of a suitable catalyst, and also a production method of obtaining 1,1,1,4,4,4-hexafluorobutane by reducing said products in the presence of a noble metal catalyst.
    Type: Grant
    Filed: July 27, 1995
    Date of Patent: March 4, 1997
    Assignee: Daikin Industries, Ltd.
    Inventors: Tatsuo Nakada, Hirokazu Aoyama, Seiji Takubo
  • Patent number: 5576095
    Abstract: A water- and oil-repellent fiber formed from a synthetic resin composition which contains a fluorine-containing polymer having a repeating unit (a) having a perfluoroalkyl or perfluoroalkenyl group and an ether linkage gives a fabric having excellent water- and oil-repellency, excellent stain resistance and excellent feeling.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: November 19, 1996
    Assignee: Daikin Industries, Ltd.
    Inventors: Akihiko Ueda, Seiji Takubo, Yoshio Amimoto
  • Patent number: 5510407
    Abstract: A mold release agent composition which contains A) 10 to 95% by weight of a copolymer of a polyfluoroalkyl acrylate or methacrylate ester having a polyfluoroalkyl group having 1 to 20 carbon atoms and a vinyl compound having an alkyl group having 8 to 30 carbon atoms, and B) 90 to 5% by weight of a silicone, has sufficient releasability, has an only slightly amount of the migration to a shaped article and gives no adverse effect on fabricability of a shaped article surface.
    Type: Grant
    Filed: February 25, 1994
    Date of Patent: April 23, 1996
    Assignee: Daikin Industries Ltd.
    Inventors: Masayuki Yamana, Seiji Takubo
  • Patent number: 5427127
    Abstract: A dish washing method includes a process for applying a sticking inhibitor to the surface of dishes in order to make it easy to remove food from the surface of the dishes. The sticking inhibitor is a compound having hydrophilic and hydrophobic groups. The compound is absorbed to the surfaces of the dishes by the hydrophilic groups, and is absorbed to food surfaces by the hydrophobic groups. The compound is a compound containing a fluoroalkyl group. Also, a dish washer has a reservoir for storing therein the sticking inhibitor and a passageway for joining the sticking inhibitor with a detergent.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: June 27, 1995
    Assignee: Daikin Industries, Ltd.
    Inventors: Munehiro Nogi, Koichiro Miyazaki, Seiji Takubo, Yoshio Amimoto, Ryutaro Ohashi
  • Patent number: 5329948
    Abstract: A dish washing method includes a process for applying a sticking inhibitor to the surface of dishes in order to make it easy to remove food from the surface of the dishes. The sticking inhibitor is a compound having hydrophilic and hydrophobic groups. The compound is absorbed to the surfaces of the dishes by the hydrophilic groups, and is absorbed to food surfaces by the hydrophobic groups. The compound is a compound containing a fluoroalkyl group. Also, a dish washer has a reservoir for storing therein the sticking inhibitor and a passageway for joining the sticking inhibitor with a detergent.
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: July 19, 1994
    Assignee: Daikin Industries, Ltd.
    Inventors: Munehiro Nogi, Koichiro Miyazaki, Seiji Takubo, Yoshio Amimoto, Ryutaro Ohashi
  • Patent number: 5079299
    Abstract: This invention provides a mold release composition copmrising (1) a compound or a polymer having at least one of perfluoroalkyl groups having 4 to 20 carbon atoms and perfluoroalkenyl groups having 4 to 20 carbon atoms, and (2) a ladder polymer of organosilsesquioxane.
    Type: Grant
    Filed: July 16, 1989
    Date of Patent: January 7, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Iwao Hisamoto, Masayoshi Shinjyo, Seiji Takubo, Yasuko Katakura