Patents by Inventor Koichi Yanase

Koichi Yanase 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: 8766021
    Abstract: In the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf), formation of HFC-254eb as an excessively reduced product is suppressed. A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound gas composed of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen gas, in the presence of a catalyst, wherein the catalyst is a catalyst having palladium supported on active carbon, and the ratio of the number of moles of the hydrogen gas to the number of moles of chlorine atoms in the raw material compound gas (H2/Cl) is at most 0.7.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: July 1, 2014
    Assignee: Asahi Glass Company, Limited
    Inventors: Satoshi Kawaguchi, Hidekazu Okamoto, Yu Takeuchi, Hirokazu Takagi, Kunio Watanabe, Koichi Yanase
  • Patent number: 8530710
    Abstract: The object is to provide a process whereby it is possible to produce 2,3,3,3-tetrafluoropropene at a high conversion ratio constantly for a long period of time. A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen, in the presence of a noble metal catalyst supported on active carbon having an ash content of at most 3% as measured in accordance with ASTM D2866.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: September 10, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Hirokazu Takagi, Hidekazu Okamoto, Satoshi Kawaguchi, Yu Takeuchi, Kunio Watanabe, Koichi Yanase, Shingo Nomura
  • Patent number: 8530711
    Abstract: The object is to provide a process for producing highly pure 2,3,3,3-tetrafluoropropene, whereby formation of 3,3,3-trifluoropropene is suppressed. A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound composed of 1,1-dichloro-2,3,3,3-tetrafluoropropene and/or 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen in a gas phase in a reactor having a catalyst layer packed with a catalyst-supporting carrier, while maintaining the maximum temperature of the catalyst layer to be at most 130° C., to obtain formed gas containing 2,3,3,3-tetrafluoropropene, and then, contacting the formed gas discharged from the reactor, with alkali at a temperature of at most 100° C.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: September 10, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Satoshi Kawaguchi, Hidekazu Okamoto, Yu Takeuchi, Hirokazu Takagi, Kunio Watanabe, Koichi Yanase
  • Patent number: 8399722
    Abstract: The object is to provide a process for producing highly pure 2,3,3,3-tetrafluoropropene, whereby formation of 3,3,3-trifluoropropene as a by-product is suppressed. A process for producing 2,3,3,3-tetrafluoropropene, which comprises introducing and reacting a raw material compound composed of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen, in a catalyst layer packed with a catalyst-supporting carrier, wherein the temperature of the catalyst layer is controlled to be higher than the dew point of the raw material mixed gas comprising the raw material compound and the hydrogen, and the maximum temperature of the catalyst layer is maintained to be at most 130° C. during the reaction.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: March 19, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Satoshi Kawaguchi, Hidekazu Okamoto, Yu Takeuchi, Hirokazu Takagi, Kunio Watanabe, Koichi Yanase
  • Publication number: 20110319681
    Abstract: The object is to provide a process for producing highly pure 2,3,3,3-tetrafluoropropene, whereby formation of 3,3,3-trifluoropropene as a by-product is suppressed. A process for producing 2,3,3,3-tetrafluoropropene, which comprises introducing and reacting a raw material compound composed of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen, in a catalyst layer packed with a catalyst-supporting carrier, wherein the temperature of the catalyst layer is controlled to be higher than the dew point of the raw material mixed gas comprising the raw material compound and the hydrogen, and the maximum temperature of the catalyst layer is maintained to be at most 130° C. during the reaction.
    Type: Application
    Filed: June 23, 2011
    Publication date: December 29, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Satoshi KAWAGUCHI, Hidekazu Okamoto, Yu Takeuchi, Hirokazu Takagi, Kunio Watanabe, Koichi Yanase
  • Publication number: 20110319680
    Abstract: In the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf), formation of HFC-254eb as an excessively reduced product is suppressed. A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound gas composed of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen gas, in the presence of a catalyst, wherein the catalyst is a catalyst having palladium supported on active carbon, and the ratio of the number of moles of the hydrogen gas to the number of moles of chlorine atoms in the raw material compound gas (H2/Cl) is at most 0.7.
    Type: Application
    Filed: June 23, 2011
    Publication date: December 29, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Satoshi KAWAGUCHI, Hidekazu OKAMOTO, Yu TAKEUCHI, Hirokazu TAKAGI, Kunio WATANABE, Koichi YANASE
  • Publication number: 20110319676
    Abstract: The object is to provide a process whereby it is possible to produce 2,3,3,3-tetrafluoropropene at a high conversion ratio constantly for a long period of time. A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound of at least one of 1,1-dichloro-2,3,3,3-tetrafluoropropene and 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen, in the presence of a noble metal catalyst supported on active carbon having an ash content of at most 3% as measured in accordance with ASTM D2866.
    Type: Application
    Filed: June 23, 2011
    Publication date: December 29, 2011
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Hirokazu TAKAGI, Hidekazu Okamoto, Satoshi Kawaguchi, Yu Takeuchi, Kunio Watanabe, Koichi Yanase, Shingo Nomura
  • Publication number: 20110319677
    Abstract: The object is to provide a process for producing highly pure 2,3,3,3-tetrafluoropropene, whereby formation of 3,3,3-trifluoropropene is suppressed. A process for producing 2,3,3,3-tetrafluoropropene, which comprises reacting a raw material compound composed of 1,1-dichloro-2,3,3,3-tetrafluoropropene and/or 1-chloro-2,3,3,3-tetrafluoropropene, and hydrogen in a gas phase in a reactor having a catalyst layer packed with a catalyst-supporting carrier, while maintaining the maximum temperature of the catalyst layer to be at most 130° C., to obtain formed gas containing 2,3,3,3-tetrafluoropropene, and then, contacting the formed gas discharged from the reactor, with alkali at a temperature of at most 100° C.
    Type: Application
    Filed: June 23, 2011
    Publication date: December 29, 2011
    Applicant: Asahi Glass Company, Limited
    Inventors: Satoshi KAWAGUCHI, Hidekazu Okamoto, Yu Takeuchi, Hirokazu Takagi, Kunio Watanabe, Koichi Yanase
  • Patent number: 7371899
    Abstract: To provide a method for producing carbonyl fluoride by employing carbon monoxide and fluorine as starting materials, without such a problem as vigorous heat generation or a decrease in the reaction yield due to a side reaction.
    Type: Grant
    Filed: June 15, 2007
    Date of Patent: May 13, 2008
    Assignee: Asahi Glass Company, Limited
    Inventors: Yuuki Mitsui, Koichi Yanase
  • Patent number: 7351342
    Abstract: An aqueous solution containing a fluorine-containing emulsifier in a low concentration of at least 1 ppm by mass and at most 1% by mass (e.g., coagulation waste water after an emulsion polymerization of a fluoropolymer and/or an aqueous solution obtained by washing with an aqueous solution a waste gas from a drying process and/or a heat treating process of the fluoropolymer) is subjected to vacuum concentration under a pressure of at most 100 kPa and a temperature of the aqueous solution of at most 100° C. by means of a heating tube surface evaporation type concentrator equipped with a heat pump or the like, and the fluorine-containing emulsifier is recovered from a highly concentrated aqueous solution containing the fluorine-containing emulsifier in a higher concentration of at least 5% by mass. According to the present method, the fluorine-containing emulsifier can be recovered with a high yield from a low-concentration liquid such as coagulation waste water of a fluoropolymer.
    Type: Grant
    Filed: December 16, 2004
    Date of Patent: April 1, 2008
    Assignees: Asahi Glass Company, Limited, Sasakura Engineering Co., Ltd.
    Inventors: Hiroshi Funaki, Koichi Yanase, Hiroki Kamiya, Masao Uehara, Kenichiro Nagatomo, Yasushi Nishimura, Shiro Ohno, Satoru Hirano
  • Publication number: 20070249863
    Abstract: To provide a method for producing carbonyl fluoride by employing carbon monoxide and fluorine as starting materials, without such a problem as vigorous heat generation or a decrease in the reaction yield due to a side reaction. A method for producing carbonyl fluoride, which comprises introducing carbon monoxide gas and fluorine gas into a liquid, and letting carbon monoxide and fluorine react with each other to obtain carbonyl fluoride.
    Type: Application
    Filed: June 15, 2007
    Publication date: October 25, 2007
    Applicant: ASAHI GLASS CO., LTD.
    Inventors: Yuuki MITSUI, Koichi Yanase
  • Patent number: 7161025
    Abstract: The present invention provides a method for producing industrially useful fluorine-containing compounds such as a fluorinated ester compound and an acid fluoride compound. Namely, the present invention resides in a method for producing a fluorinated ester compound, which comprises fluorinating an ester compound which is an ester of a compound having hydroxyl group(s) with a compound having acyl fluoride group(s) and which has a structure which can be fluorinated, in a liquid phase to produce a fluorinated ester compound, wherein the fluorination is carried out in the form of a liquid mixture of the ester compound and the compound having acyl fluoride group(s).
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: January 9, 2007
    Assignee: Asahi Glass Company, Limited
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Koichi Yanase, Yasuhiro Suzuki, Daisuke Shirakawa
  • Patent number: 7071272
    Abstract: The present invention provides a method for preparing a compound of CF3CF2CF2OCF?CF2 by pyrolyzing a compound expressed by CF3CF2CF2OCF(CF3)COOCF2CF(CF3)OCF2CF2CF3 in a gas phase at a temperature of from 200° C. to 500° C.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: July 4, 2006
    Assignee: Asahi Glass Company, Limited
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Masakuni Sato, Hidenobu Murofushi, Koichi Yanase, Yasuhiro Suzuki
  • Patent number: 7053237
    Abstract: A process for producing a fluorinated ester through a small number of steps, is presented. The process for producing a fluorinated ester, comprises a transesterification step in which RAF—COOCF2—RAF and RA—CH2OH are subjected to a transesterification reaction to obtain RAF—COOCH2—RA, and a fluorination step in which the obtained compound is fluorinated to obtain a reaction product containing RAF—COOCF2—RAF. Here, in the formulae, RA is a monovalent organic group, and RAF is the same group as RA or a monovalent organic group obtained by fluorination of RA.
    Type: Grant
    Filed: July 16, 2003
    Date of Patent: May 30, 2006
    Assignee: Asahi Glass Company, Limited
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Hidenobu Murofushi, Masakuni Sato, Masahiro Ito, Koichi Yanase, Yasuhiro Suzuki
  • Patent number: 7034179
    Abstract: The present invention provides a method for producing industrially useful fluorine-containing compounds such as a fluorinated ester compound and an acid fluoride compound. Namely, the present invention resides in a method for producing a fluorinated ester compound, which comprises fluorinating an ester compound which is an ester of a compound having hydroxyl group(s) with a compound having acyl fluoride group(s) and which has a structure which can be fluorinated, in a liquid phase to produce a fluorinated ester compound, wherein the fluorination is carried out in the form of a liquid mixture of the ester compound and the compound having acyl fluoride group(s).
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: April 25, 2006
    Assignee: Asahi Glass Company, Limited
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Koichi Yanase, Yasuhiro Suzuki, Daisuke Shirakawa
  • Publication number: 20050261516
    Abstract: A process for producing a fluorinated ester through a small number of steps, is presented. The process for producing a fluorinated ester, comprises a transesterification step in which RAF—COOCF2—RAF and RA—CH2OH are subjected to a transesterification reaction to obtain RAF—COOCH2—RA, and a fluorination step in which the obtained compound is fluorinated to obtain a reaction product containing RAF—COOCF2—RAF. Here, in the formulae, RA is a monovalent organic group, and RAF is the same group as RA or a monovalent organic group obtained by fluorination of RA.
    Type: Application
    Filed: July 16, 2003
    Publication date: November 24, 2005
    Applicant: ASAHI GLASS COMPANY
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Hidenobu Murofushi, Masakuni Sato, Masahiro Ito, Koichi Yanase, Yasuhiro Suzuki
  • Publication number: 20050192456
    Abstract: The present invention provides a method for producing industrially useful fluorine-containing compounds such as a fluorinated ester compound and an acid fluoride compound. Namely, the present invention resides in a method for producing a fluorinated ester compound, which comprises fluorinating an ester compound which is an ester of a compound having hydroxyl group(s) with a compound having acyl fluoride group(s) and which has a structure which can be fluorinated, in a liquid phase to produce a fluorinated ester compound, wherein the fluorination is carried out in the form of a liquid mixture of the ester compound and the compound having acyl fluoride group(s).
    Type: Application
    Filed: April 14, 2005
    Publication date: September 1, 2005
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Koichi Yanase, Yasuhiro Suzuki, Daisuke Shirakawa
  • Publication number: 20050150833
    Abstract: An aqueous solution containing a fluorine-containing emulsifier in a low concentration of at least 1 ppm by mass and at most 1% by mass (e.g., coagulation waste water after an emulsion polymerization of a fluoropolymer and/or an aqueous solution obtained by washing with an aqueous solution a waste gas from a drying process and/or a heat treating process of the fluoropolymer) is subjected to vacuum concentration under a pressure of at most 100 kPa and a temperature of the aqueous solution of at most 100° C. by means of a heating tube surface evaporation type concentrator equipped with a heat pump or the like, and the fluorine-containing emulsifier is recovered from a highly concentrated aqueous solution containing the fluorine-containing emulsifier in a higher concentration of at least 5% by mass. According to the present method, the fluorine-containing emulsifier can be recovered with a high yield from a low-concentration liquid such as coagulation waste water of a fluoropolymer.
    Type: Application
    Filed: December 16, 2004
    Publication date: July 14, 2005
    Applicants: ASAHI GLASS COMPANY LIMITED, SASAKURA ENGINEERING CO., LTD.
    Inventors: Hiroshi Funaki, Koichi Yanase, Hiroki Kamiya, Masao Uehara, Kenichiro Nagatomo, Yasushi Nishimura, Shiro Ohno, Satoru Hirano
  • Publication number: 20040241481
    Abstract: There is provided a multilayer film comprising two outer layers and at least one inner layer interposed between the outer layers, wherein the multilayer film:
    Type: Application
    Filed: June 30, 2004
    Publication date: December 2, 2004
    Applicant: Sumitomo Chemical Co., Ltd.
    Inventors: Akihiro Ichige, Koichi Yanase
  • Publication number: 20030219584
    Abstract: Disclosed are a sheet which has a resin layer comprising a polyolefin resin with a degree of crystallinity of at least 45% wherein the resin layer has a total haze of up to 10% and wherein at least one surface of the sheet is the resin layer, a thermoformed article obtained by thermoforming the sheet, and a laminate structure comprising the sheet or thermoformed article and a substrate made of a thermoplastic resin, the substrate being laminated on the sheet or thermoformed article.
    Type: Application
    Filed: March 3, 2003
    Publication date: November 27, 2003
    Applicant: Sumitomo Chemical Company, Limited
    Inventors: Kenichi Higashi, Koichi Yanase, Takashi Fujimoto