Patents by Inventor Kazuyoshi Ichihara
Kazuyoshi Ichihara 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: 9169225Abstract: The present invention provides a novel method for producing hexafluoropropylene oxide, which can attain a high HFPO selectivity without using a phase transfer catalyst. Hexafluoropropylene (HFP), a water-soluble and aprotic organic solvent, and an aqueous solution of an oxidizing agent are introduced into a small space, thereby bringing into contact with each other and reacting hexafluoropropylene with the oxidizing agent to obtain hexafluoropropylene oxide (HFPO).Type: GrantFiled: March 9, 2010Date of Patent: October 27, 2015Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Kazuyoshi Ichihara, Hideki Nakaya, Mai Hirai, Yasuhide Senba
-
Patent number: 8877017Abstract: The present invention provides a novel method for separating hexafluoropropylene oxide (HFPO) from hexafluoropropylene (HFP), which is capable of reducing the burden on the environment. A mixture including HFPO and HFP is subjected to an extractive distillation operation using, as a solvent, at least one of a fluorine-containing saturated compound represented by the general formula CnHaFb (wherein n, a and b are integers which satisfy: n=3 to 8, 0?a?2n+1, and 1?b?2n+2) thereby separating into a first fraction including HFPO and a second fraction including HFP and the solvent. At least one of 1-bromopropane and 2-bromopropane may be u as the solvent in place of the fluorine-containing saturated compound.Type: GrantFiled: February 18, 2010Date of Patent: November 4, 2014Assignee: Daikin Industries, Ltd.Inventors: Hideki Nakaya, Kazuyoshi Ichihara, Yasuhide Senba, Mikio Nakagoshi, Kazunori Morimoto
-
Patent number: 8143440Abstract: There is provided a method for separating and collecting at least alcohol with a high purity from an azeotropic mixture of olefin and alcohol.Type: GrantFiled: January 9, 2009Date of Patent: March 27, 2012Assignee: Daikin Industries, Ltd.Inventors: Yuuki Matsuda, Kazuyoshi Ichihara, Takeomi Hirasaka, Takuya Ichida
-
Publication number: 20120016142Abstract: The present invention provides a novel method for producing hexafluoropropylene oxide, which can attain a high HFPO selectivity without using a phase transfer catalyst. Hexafluoropropylene (HFP), a water-soluble and aprotic organic solvent, and an aqueous solution of an oxidizing agent are introduced into a small space, thereby bringing into contact with each other and reacting hexafluoropropylene with the oxidizing agent to obtain hexafluoropropylene oxide (HFPO).Type: ApplicationFiled: March 9, 2010Publication date: January 19, 2012Inventors: Kazuyoshi Ichihara, Hideki Nakaya, Mai Hirai, Yasuhide Senba
-
Publication number: 20120006672Abstract: The present invention provides a novel method for separating hexafluoropropylene oxide (HFPO) from hexafluoropropylene (HFP), which is capable of reducing the burden on the environment. A mixture including HFPO and HFP is subjected to an extractive distillation operation using, as a solvent, at least one of a fluorine-containing saturated compound represented by the general formula CnHaFb (wherein n, a and b are integers which satisfy: n=3 to 8, 0?a?2n+1, and 1?b?2n+2) thereby separating into a first fraction including HFPO and a second fraction including HFP and the solvent. At least one of 1-bromopropane and 2-bromopropane may be u as the solvent in place of the fluorine-containing saturated compound.Type: ApplicationFiled: February 18, 2010Publication date: January 12, 2012Inventors: Hideki Nakaya, Kazuyoshi Ichihara, Yasuhide Senba, Mikio Nakagoshi, Kazunori Morimoto
-
Publication number: 20100298595Abstract: There is provided a method for separating and collecting at least alcohol with a high purity from an azeotropic mixture of olefin and alcohol.Type: ApplicationFiled: January 9, 2009Publication date: November 25, 2010Inventors: Yuuki Matsuda, Kazuyoshi Ichihara, Takeomi Hirasaka, Takuya Ichida
-
Patent number: 7692048Abstract: The present invention provides a method for producing a fluorine-containing halide, comprising reacting a fluorine-containing sulfonyl halide or fluorine-containing disulfonyl chloride with a metal halide or metal component in the present or absence of a solvent. In accordance with the present invention, a fluorine-containing bromide, fluorine-containing iodide or fluorine-containing chloride can be readily produced in high yield at low cost, using an industrially advantageous process.Type: GrantFiled: March 11, 2005Date of Patent: April 6, 2010Assignee: Daikin Industries, Ltd.Inventors: Akinari Sugiyama, Kazuyoshi Ichihara, Noriyuki Shinoki, Toshiya Mantani, Masahiro Kondou
-
Patent number: 7321071Abstract: The present invention relates to a method for producing a water-soluble fluorine-containing vinyl ether which comprises subjecting a fluorine-containing 2-alkoxypropionic acid derivative represented by the following general formula (I): (wherein A represents —OM1 or —OM21/2, and M1 represents an alkali metal and M2 represents an alkaline earth metal; X represents a halogen atom; Y1 and Y2 are the same or different and each represents a fluorine atom, a chlorine atom, a perfluoroalkyl group or a fluorochloroalkyl group; n represents an integer of 0 to 3, and n of Y1s may be the same or different; m represents an integer of 1 to 5, and m of Y2s are the same or different; and Z represents a hydrophilic group) to thermal decomposition at a temperature of not lower than 50° C. but lower than 170° C.Type: GrantFiled: June 16, 2003Date of Patent: January 22, 2008Assignee: Daikin Industries, Ltd.Inventors: Kenji Ishii, Noriyuki Shinoki, Takuya Arase, Kazuyoshi Ichihara, Toshiya Mantani
-
Publication number: 20080004473Abstract: The present invention provides a method of producing a fluorine-containing fluorosulfonylalkyl vinyl ether represented by the formula CF2=CFOCF2CF2SO2F, the method comprising reacting a fluorine-containing chlorosulfonylalkyl vinyl ether represented by the formula CF2=CFOCF2CF2SO2Cl with a fluorinating agent represented by the formula KF·(HF)n (wherein n is 0 to 5) in a polar organic solvent at a temperature not higher than 70° C. The method of the invention produces the fluorine-containing fluorosulfonylalkyl vinyl ether in high yield at low cost in a simple, industrially advantageous manner.Type: ApplicationFiled: October 28, 2005Publication date: January 3, 2008Inventors: Akinari Sugiyama, Kazuyoshi Ichihara, Noriyuki Shinoki, Toshiya Mantani, Masahiro Kondou
-
Publication number: 20070185355Abstract: The present invention provides a method for producing a fluorine-containing halide, comprising reacting a fluorine-containing sulfonyl halide or fluorine-containing disulfonyl chloride with a metal halide or metal component in the present or absence of a solvent. In accordance with the present invention, a fluorine-containing bromide, fluorine-containing iodide or fluorine-containing chloride can be readily produced in high yield at low cost, using an industrially advantageous process.Type: ApplicationFiled: March 11, 2005Publication date: August 9, 2007Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Akinari Sugiyama, Kazuyoshi Ichihara, Noriyuki Shinoki, Toshiya Mantani, Masahiro Kondou
-
Patent number: 7005545Abstract: The present invention provides a process for producing a fluorinated fluorosulfonylalkyl vinyl ether represented by general formula (2): CF2?CFO(CF2CF(CF3)O)nCF2CF2SO2F??(2) wherein n is an integer from 0 to 10, comprising fluorinating a perfluorovinylether sulfonate with SF4 and HF, the perfluorovinylether sulfonate being represented by general formula (1): CF2?CFO(CF2CF(CF3)O)nCF2CF2SO3M??(1) wherein M is Ma or Mb1/2, provided that Ma is an alkali metal and Mb is an alkaline earth metal; and n is as defined above. According to the process of the invention, the fluorinated fluorosulfonylalkyl vinyl ether can be produced in high yield in an industrially advantageous manner.Type: GrantFiled: May 23, 2003Date of Patent: February 28, 2006Assignee: Daikin Industries, Ltd.Inventors: Akinari Sugiyama, Tatsuya Ohtsuka, Kazuyoshi Ichihara, Toshiya Mantani
-
Publication number: 20050245758Abstract: The present invention relates to a method for producing a water-soluble fluorine-containing vinyl ether which comprises subjecting a fluorine-containing 2-alkoxypropionic acid derivative represented by the following general formula (I): (wherein A represents —OM1 or —OM21/2, and M1 represents an alkali metal and M2 represents an alkaline earth metal; X represents a halogen atom; Y1 and Y2 are the same or different and each represents a fluorine atom, a chlorine atom, a perfluoroalkyl group or a fluorochloroalkyl group; n represents an integer of 0 to 3, and n of Y1s may be the same or different; m represents an integer of 1 to 5, and m of Y2s are the same or different; and Z represents a hydrophilic group) to thermal decomposition at a temperature of not lower than 50° C. but lower than 170° C.Type: ApplicationFiled: June 16, 2003Publication date: November 3, 2005Applicant: Saikin Industries, LTD. Umeda Center BuildingInventors: Kenji Ishii, Noriyuki Shinoki, Takuya Arase, Kazuyoshi Ichihara, Toshiya Mantani
-
Publication number: 20050177001Abstract: The present invention provides a process for producing a fluorinated fluorosulfonylalkyl vinyl ether represented by general formula (2): CF2=CFO(CF2CF(CF3)O)nCF2CF2SO2F??(2) wherein n is an integer from 0 to 10, comprising fluorinating a perfluorovinylether sulfonate with SF4 and HF, the perfluorovinylether sulfonate being represented by general formula (1): CF2=CFO(CF2CF(CF3)O)nCF2CF2SO3M??(1) wherein M is Ma or Mb1/2, provided that Ma is an alkali metal and Mb is an alkaline earth metal; and n is as defined above. According to the process of the invention, the fluorinated fluorosulfonylalkyl vinyl ether can be produced in high yield in an industrially advantageous manner.Type: ApplicationFiled: May 23, 2003Publication date: August 11, 2005Inventors: Akinari Sugiyama, Tatsuya Ohtsuka, Kazuyoshi Ichihara, Toshiya Mantani
-
Patent number: 6891064Abstract: The present invention provides a process for producing a fluoroalkylcarboxylic acid of the formula RfCOOH wherein Rf is a C1-16 fluoroalkyl group, which comprises oxidizing a fluoroalkyl alcohol of the formula RfCH2OH wherein Rf is as defined above using nitric acid. The process according to the present invention produces a fluoroalkylcarboxylic acid with high selectivity at low costs.Type: GrantFiled: May 20, 1999Date of Patent: May 10, 2005Assignee: Daikin Industries, Ltd.Inventors: Kazuyoshi Ichihara, Hirokazu Aoyama
-
Patent number: 6268326Abstract: An antimicrobial agent suitable for eradicating Legionella contains at least one amine oxide represented by the formula (1) and/or at least one amine oxide represented by the formula (2). R1represents CnH2n+1(OC2H4)m, n varies from 12 to 18, m varies from 0 to 10, R2 represents a hydrogen or alkyl group having from 1 to 4 carbon atom(s), and the solid arrow represents a coordinate bond between a nitrogen and oxygen. R1 represents CnH2n+1(OC2H4)m, n varies from 12 to 18, m varies from 0 to 10, R3 represents (CpH2p)OH with p varying from 1 to 4, and the solid arrow represents a coordinate bond between a nitrogen and oxygen.Type: GrantFiled: January 10, 2000Date of Patent: July 31, 2001Assignee: Showa Water Industries Co., Ltd.Inventors: Masumi Mizutani, Kazuyoshi Ichihara, Keiko Yamashita
-
Patent number: 6172029Abstract: An antimicrobial agent suitable for eradicating Legionella contains at least one amine oxide represented by the formula (1) and/or at least one amine oxide represented by the formula (2). R1 represents CnH2n+1(OC2H4)m, n varies from 12 to 18, m varies from 0 to 10, R2 represents a hydrogen or alkyl group having from 1 to 4 carbon atom(s), and the solid arrow represents a coordinate bond between a nitrogen and oxygen. R1 represents CnH2n+1(OC2H4)m, n varies from 12 to 18, m varies from 0 to 10, R3 represents (CpH2p)OH with p varying from 1 to 4, and the solid arrow represents a coordinate bond between a nitrogen and oxygen.Type: GrantFiled: February 24, 1999Date of Patent: January 9, 2001Assignee: Showa Water Industries Co., Ltd.Inventors: Masumi Mizutani, Kazuyoshi Ichihara, Keiko Yamashita
-
Patent number: 4494825Abstract: A liquid crystal display device, wherein a fill port for inserting a liquid crystal composition thereinto is sealed by using a photo-setting resin composition comprising an acrylic or methacrylic type resin as a major resin component and two or more photosensitizers different in quality, is excellent in reliability and the sealed portion of the fill port can sufficiently and uniformly be cured both in surface and inner portions by irradiation of light in a short time.Type: GrantFiled: March 3, 1982Date of Patent: January 22, 1985Assignee: Hitachi, Ltd.Inventors: Ken Sasaki, Shigeru Matsuyama, Masaharu Koyama, Kazuyoshi Ichihara