Patents by Inventor Fuyuhiko Sakyu
Fuyuhiko Sakyu 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: 20120123172Abstract: Production of trans-1,3,3,3-tetrafluoropropene by reacting 1-chloro-3,3,3-trifluoropropene with hydrogen fluoride to obtain a reaction product A containing formed trans-1,3,3,3-tetrafluoropropene, unreacted 1-chloro-3,3,3-trifloropropene and hydrogen fluoride, and by-product cis-1,3,3,3-tetrafluoropropene, 1,1,1,3,3-pentafluoropropane and hydrogen chloride; distilling reaction product A to recover a distillation bottom product containing 1-chloro-3,3,3-trifloropropene and hydrogen fluoride and supplying recovered distillation bottom product to the reacting step; recovering hydrogen fluoride from a residue B remaining after recovery of the distillation bottom product and supplying recovered hydrogen fluoride to the reacting step; contacting a residue C remaining after recovery of hydrogen fluoride with water or aqueous sodium hydroxide solution to separate hydrogen chloride; dehydrating a residue D remaining after separation of hydrogen chloride; and distilling a residue E remaining after the dehydration to obType: ApplicationFiled: October 14, 2011Publication date: May 17, 2012Applicant: Central Glass Company, LimitedInventors: Yasuo Hibino, Satoshi Yoshikawa, Yoshio Nishiguchi, Satoru Okamoto, Fuyuhiko Sakyu
-
Patent number: 8115037Abstract: There is provided a method for producing 1,3,3,3-tetrafluoropropene. This method includes dehydrofluorinating 1,1,1,3,3-pentafluoropropane in gas phase in the presence of a zirconium compound-carried catalyst in which a zirconium compound is carried on a metal oxide or activated carbon.Type: GrantFiled: December 12, 2008Date of Patent: February 14, 2012Assignee: Central Glass Company, LimitedInventors: Fuyuhiko Sakyu, Yasuo Hibino
-
Patent number: 8016911Abstract: A method of using a protective gas composition comprising a fluorine-containing organic compound and a carrier gas for preventing a rapid oxidation or combustion of a molten magnesium/magnesium alloy alloy in a magnesium or magnesium alloy production process.Type: GrantFiled: June 28, 2010Date of Patent: September 13, 2011Assignee: Central Glass Company, LimitedInventors: Yasuo Hibino, Ryoichi Tamai, Satoru Okamoto, Fuyuhiko Sakyu
-
Protective gas composition for magnesium/magnesium alloy production and combustion preventing method
Patent number: 7988762Abstract: There is provided a protective gas composition for preventing combustion of a molten magnesium/magnesium alloy, containing a compound selected from the group consisting of 1,1,1,3,3-pentafluoropropane (HFC-245fa), 1,3,3,3-tetrafluoropropene (OHFC-1234ze), methyl 1,1,2,2-tetrafluoroethyl ether (HFE-254pc), which are fluorine-containing organic compounds, and mixtures thereof; and a carrier gas.Type: GrantFiled: November 1, 2006Date of Patent: August 2, 2011Assignees: Central Glass Company, Limited, Nagaoka University of TechnologyInventors: Shigeharu Kamado, Hayato Okumura, Daisuke Yamagata, Yasuo Hibino, Fuyuhiko Sakyu -
Publication number: 20110172472Abstract: According to the first characteristic of the present invention, there is provided a production process for 1,3,3,3-tetrafluoropropene including: the first step of reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride thereby obtaining 1-chloro-3,3,3-trifluoropropene; and the second step of reacting 1-chloro-3,3,3-trifluoropropene obtained in the first step with hydrogen fluoride in a gaseous phase in the presence of a fluorination catalyst. According to the second characteristic of the present invention, there is provided a dehydration process including bringing 1,3,3,3-tetrafluoropropene containing at least water into contact with zeolite.Type: ApplicationFiled: September 24, 2009Publication date: July 14, 2011Applicant: Central Glass Company, LimitedInventors: Fuyuhiko Sakyu, Satoshi Yoshikawa, Satoru Okamoto, Yasuo Hibino, Yoshio Nishiguchi
-
Publication number: 20100263489Abstract: A method of using a protective gas composition comprising a fluorine-containing organic compound and a carrier gas for preventing a rapid oxidation or combustion of a molten magnesium/magnesium alloy alloy in a magnesium or magnesium alloy production process.Type: ApplicationFiled: June 28, 2010Publication date: October 21, 2010Applicant: CENTRAL GLASS COMPANY, LIMITEDInventors: Yasuo HIBINO, Ryoichi Tamai, Satoru Okamoto, Fuyuhiko Sakyu
-
Protective Gas Composition For Magnesium/Magnesium Alloy Production And Combustion Preventing Method
Publication number: 20100257976Abstract: There is provided a protective gas composition for preventing combustion of a molten magnesium/magnesium alloy, containing a compound selected from the group consisting of 1,1,1,3,3-pentafluoropropane (HFC-245fa), 1,3,3,3-tetrafluoropropene (OHFC-1234ze), methyl 1,1,2,2-tetrafluoroethyl ether (HFE-254pc), which are fluorine-containing organic compounds, and mixtures thereof; and a carrier gas.Type: ApplicationFiled: November 1, 2006Publication date: October 14, 2010Applicant: NAGAOKA UNIVERSITY OF TECHNOLOGYInventors: Shigeharu Kamado, Hayato Okumura, Daisuke Yamagata, Yasuo Hibino, Fuyuhiko Sakyu -
Publication number: 20100256426Abstract: There is provided a method for producing trans-1,3,3,3-tetrafluoropropene, which includes the step of bringing cis-1,3,3,3-tetrafluoropropene into contact, in a gas phase, with a metal oxide, an activated carbon supporting thereon a metal compound, or a fluorinated derivative thereof, as a catalyst.Type: ApplicationFiled: October 7, 2008Publication date: October 7, 2010Applicant: CENTRAL GLASS COMPANY, LTD.Inventors: Fuyuhiko Sakyu, Satoru Okamoto, Yasuo Hibino
-
Publication number: 20090099395Abstract: There is provided a method for producing 1,3,3,3-tetrafluoropropene. This method includes dehydrofluorinating 1,1,1,3,3-pentafluoropropane in gas phase in the presence of a zirconium compound-carried catalyst in which a zirconium compound is carried on a metal oxide or activated carbon.Type: ApplicationFiled: December 12, 2008Publication date: April 16, 2009Applicant: CENTRAL GLASS COMPANY, LIMITEDInventors: Fuyuhiko Sakyu, Yasuo Hibino
-
Publication number: 20080163956Abstract: There is provided a protective gas composition for preventing a rapid oxidation or combustion of a molten magnesium/magnesium alloy, comprising a fluorine-containing organic compound and a carrier gas. Furthermore, there is provided a method for preventing a rapid oxidation or combustion of a molten magnesium or magnesium alloy, which is characterized in that the above gas composition is used as a protective gas for preventing an oxidation or combustion of a molten magnesium or magnesium alloy in a magnesium or magnesium alloy production.Type: ApplicationFiled: April 26, 2006Publication date: July 10, 2008Applicant: CENTRAL GLASS COMPANY, LIMITEDInventors: Yasuo Hibino, Ryoichi Tamai, Satoru Okamoto, Fuyuhiko Sakyu
-
Patent number: 6395940Abstract: The invention relates to a method for producing a first perhalogenated cyclopentene represented by the general formula: C5ClBF8−B where B is an integer of from 0 to 7. The method includes a step of (a) fluorinating a second perhalogenated cyclopentene by hydrogen fluoride in a gas phase in the presence of a fluorination catalyst. The second perhalogenated cyclopentene is represented by general formula: C5ClAF8−A where A is an integer of from 1 to 8, and A is not smaller than B. With this method, the first perhalogenated cyclopentene (e.g., 1,2-dichloro-3,3,4,4,5,5-hexafluorocyclopentene, another chlorofluorinated cyclopentene, or octafluorocyclopentene) can continuously easily be produced, for example, from octachlorocyclopentene obtained by chlorination of hexachlorocyclopentadiene that is easily available. Therefore, the above method is very useful as an industrial scale production method.Type: GrantFiled: March 1, 2000Date of Patent: May 28, 2002Assignees: Central Glass Company, Limited, Nippon Zeon Co., Ltd.Inventors: Takeo Komata, Takayuki Nishimiya, Fuyuhiko Sakyu, Hideaki Imura, Mikio Ujiie, Masatomi Kanai
-
Patent number: 6316681Abstract: The present invention relates to a method for producing 1,1,1,3,3-pentafluoropropane. This method includes a first step of fluorinating 1-chloro-3,3,3-trifluoropropene in a liquid phase by hydrogen fluoride in the presence of an antimony compound as a catalyst, or a second step of fluorinating 1-chloro-3,3,3-trifluoropropene in a gas phase by hydrogen fluoride in the presence of a fluorination catalyst. If the first step is taken, 1,1,1,3,3-pentafluoropropane can be produced with a high yield. If the second step is taken, 1,1,1,3,3-pentafluoropropane can continuously be easily produced. Therefore, the second step is useful for an industrial scale production thereof. According to the invention, 1-chloro-3,3,3-trifluoropropene may be produced by a method including a step of reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in a gas phase in the presence of a fluorination catalyst. This method is useful, because yield of 1-chloro-3,3,3-trifluoropropene is high.Type: GrantFiled: December 4, 1996Date of Patent: November 13, 2001Assignee: Central Glass Company, LimitedInventors: Satoshi Yoshikawa, Ryouichi Tamai, Fuyuhiko Sakyu, Yasuo Hibino, Yoshihiko Gotoh
-
Patent number: 6235951Abstract: The present invention relates to a method for producing 1,1,1,3,3-pentafluoropropane. This method includes the steps of (a) adding hydrogen fluoride to 1-chloro-3,3,3-trifluoropropene in the presence of an addition catalyst to obtain 1,1,1,3-tetrafluoro-3-chloropropane; and (b) disproportionating the 1,1,1,3-tetrafluoro-3-chloropropane into the 1,1,1,3,3-pentafluoropropane and 1,1,1-trifluoro-3,3-dichloropropane, in the presence of a disproportionation catalyst. This method is a useful method for producing 1,1,1,3,3-pentafluoropropane in an industrial scale, because its steps (a) and (b) are respectively superior in selectivity and yield. According to the invention, 1-chloro-3,3,3-trifluoropropene may be produced by a method including a step of reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in a gas phase in the presence of a fluorination catalyst. This method is useful, because yield of 1-chloro-3,3,3-trifluoropropene is high.Type: GrantFiled: November 20, 1996Date of Patent: May 22, 2001Assignee: Central Glass Company, LimitedInventors: Fuyuhiko Sakyu, Satoshi Yoshikawa, Yasuo Hibino, Yoshihiko Gotoh, Ryouichi Tamai
-
Patent number: 6198010Abstract: The present invention relates to a method for producing 1,1,1,3,3-pentafluoropropane. This method includes a first step of fluorinating 1-chloro-3,3,3-trifluoropropene in a liquid phase by hydrogen fluoride in the presence of an antimony compound as a catalyst, or a second step of fluorinating 1-chloro-3,3,3-trifluoropropene in a gas phase by hydrogen fluoride in the presence of a fluorination catalyst. If the first step is taken, 1,1,1,3,3-pentafluoropropane can be produced with a high yield. If the second step is taken, 1,1,1,3,3-pentafluoropropane can continuously be easily produced. Therefore, the second step is useful for an industrial scale production thereof. According to the invention, 1-chloro-3,3,3-trifluoropropene may be produced by a method including a step of reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in a gas phase in the presence of a fluorination catalyst. This method is useful, because yield of 1-chloro-3,3,3-trifluoropropene is high.Type: GrantFiled: October 6, 1998Date of Patent: March 6, 2001Assignee: Central Glass Company, LimitedInventors: Satoshi Yoshikawa, Ryouichi Tamai, Fuyuhiko Sakyu, Yasuo Hibino, Yoshihiko Gotoh
-
Patent number: 6166276Abstract: The invention relates to a method for producing 1,1,2,2,3,3,4-heptafluorocyclopentane. This method includes the step of reducing 1,1-dichlorooctafluorocyclopentane by hydrogen in the presence of a hydrogenation catalyst. This catalyst contains at least one first metal selected from metals of 8, 9, and 10 groups of periodic table, such as iron, cobalt, palladium, platinum, rhodium, ruthenium, iridium, and osmium. According to this method, it is possible to produce 1,1,2,2,3,3,4-heptafluorocyclopentane with high yield and high selectivity.Type: GrantFiled: November 30, 1999Date of Patent: December 26, 2000Assignees: Central Glass Company, Limited, Nippon Zeon Co., Ltd.Inventors: Fuyuhiko Sakyu, Naoto Takada, Hideaki Imura, Takeo Komata
-
Patent number: 6111150Abstract: The present invention relates to a method for producing 1,1,1,3,3-pentafluoropropane. This method includes a step of adding hydrogen fluoride to 1,3,3,3-tetrafluoropropene in a liquid phase in the presence of a hydrohalogenation catalyst. This method is a useful method for producing 1,1,1,3,3-pentafluoropropane in an industrial scale, because yield of 1,1,1,3,3-pentafluoropropane is high. According to the invention, 1,3,3,3-tetrafluoropropene may be produced by a method including a step of reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in a gas phase in the presence of a fluorination catalyst, or by another method including a step of reacting 1-chloro-3,3,3-trifluoropropene with hydrogen fluoride in a gas phase in the presence of a fluorination catalyst. According to the invention, 1-chloro-3,3,3-trifluoropropene may be produced by a method including a step of reacting 1,1,1,3,3-pentachloropropane with hydrogen fluoride in a gas phase in the presence of a fluorination catalyst.Type: GrantFiled: December 12, 1996Date of Patent: August 29, 2000Assignee: Central Glass Company, LimitedInventors: Fuyuhiko Sakyu, Yasuo Hibino, Satoshi Yoshikawa, Ryouichi Tamai, Yoshihiko Gotoh