Patents by Inventor Atsushi Shirai

Atsushi Shirai 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: 20190152779
    Abstract: An object of the present invention is to provide a novel substance that has a high reactivity as a fluorinating agent, is effectively used in various fluorination reactions, and is safely handled even in air. As the solution for achieving this object, the present invention provides a complex obtained by reacting bromine trifluoride with at least one metal halide selected from the group consisting of halogenated metals and halogenated hydrogen metals in a nonpolar solvent. This complex serves as a fluorinating agent that provides excellent fluorination performance and that is stable in air.
    Type: Application
    Filed: January 30, 2019
    Publication date: May 23, 2019
    Applicants: DAIKIN INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVESITY
    Inventors: Shoji HARA, Yosuke KISHIKAWA, Atsushi SHIRAI, Takashi NAMIKAWA, Sumi ISHIHARA
  • Patent number: 10233080
    Abstract: An object of the present invention is to provide a novel substance that has a high reactivity as a fluorinating agent, is effectively used in various fluorination reactions, and is safely handled even in air. As the solution for achieving this object, the present invention provides a complex obtained by reacting bromine trifluoride with at least one metal halide selected from the group consisting of halogenated metals and halogenated hydrogen metals in a nonpolar solvent. This complex serves as a fluorinating agent that provides excellent fluorination performance and that is stable in air.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: March 19, 2019
    Assignees: DAIKIN INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Shoji Hara, Yosuke Kishikawa, Atsushi Shirai, Takashi Namikawa, Sumi Ishihara
  • Patent number: 9758455
    Abstract: Object: An object of the present invention is to provide a method for producing, with a high yield, a fluorinated organic compound, the fluorinated organic compound having not been produced with a sufficient yield by a conventional method for producing a fluorinated organic compound using a fluorinating agent containing IF5-pyridine-HF alone. Another object of the present invention is to provide a fluorinating reagent. Means for achieving the object: A method for producing a fluorinated organic compound comprising step A of fluorinating an organic compound by bringing the organic compound into contact with (1) IF5-pyridine-HF and (2) at least one additive selected from the group consisting of amine hydrogen fluorides, XaF (wherein Xa represents hydrogen, potassium, sodium, or lithium), oxidizers, and reducing agents.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: September 12, 2017
    Assignees: DAIKIN INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Masahiro Higashi, Yosuke Kishikawa, Atsushi Shirai, Takashi Namikawa, Sumi Ishihara, Shoji Hara
  • Patent number: 9593058
    Abstract: An object of the present invention is to provide a production method that makes it possible to produce 1,1-dibromo-1-fluoroethane easily and sustainably. The present invention provides a method for producing 1,1-dibromo-1-fluoroethane, the method comprising step A of reacting 1,1-dibromoethylene with hydrogen fluoride to obtain 1,1-dibromo-1-fluoroethane.
    Type: Grant
    Filed: September 3, 2014
    Date of Patent: March 14, 2017
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Atsushi Shirai, Masatoshi Nose, Yosuke Kishikawa, Tatsuya Ohtsuka, Sumi Ishihara
  • Publication number: 20160332877
    Abstract: An object of the present invention is to provide a novel substance that has a high reactivity as a fluorinating agent, is effectively used in various fluorination reactions, and is safely handled even in air. As the solution for achieving this object, the present invention provides a complex obtained by reacting bromine trifluoride with at least one metal halide selected from the group consisting of halogenated metals and halogenated hydrogen metals in a nonpolar solvent. This complex serves as a fluorinating agent that provides excellent fluorination performance and that is stable in air.
    Type: Application
    Filed: October 2, 2014
    Publication date: November 17, 2016
    Applicants: DAIKIN INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITY
    Inventors: Shoji HARA, Yosuke KISHIKAWA, Atsushi SHIRAI, Takashi NAMIKAWA, Sumi ISHIHARA
  • Publication number: 20160221900
    Abstract: An object of the present invention is to provide a production method that makes it possible to produce 1,1-dibromo-1-fluoroethane easily and sustainably. The present invention provides a method for producing 1,1-dibromo-1-fluoroethane, the method comprising step A of reacting 1,1-dibromoethylene with hydrogen fluoride to obtain 1,1-dibromo-1-fluoroethane.
    Type: Application
    Filed: September 3, 2014
    Publication date: August 4, 2016
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Atsushi SHIRAI, Masatoshi NOSE, Yosuke KISHIKAWA, Tatsuya OHTSUKA, Sumi ISHIHARA
  • Publication number: 20150315136
    Abstract: Object: An object of the present invention is to provide a method for producing, with a high yield, a fluorinated organic compound, the fluorinated organic compound having not been produced with a sufficient yield by a conventional method for producing a fluorinated organic compound using a fluorinating agent containing IF5-pyridine-HF alone. Another object of the present invention is to provide a fluorinating reagent. Means for achieving the object: A method for producing a fluorinated organic compound comprising step A of fluorinating an organic compound by bringing the organic compound into contact with (1) IF5-pyridine-HF and (2) at least one additive selected from the group consisting of amine hydrogen fluorides, XaF (wherein Xa represents hydrogen, potassium, sodium, or lithium), oxidizers, and reducing agents.
    Type: Application
    Filed: April 1, 2015
    Publication date: November 5, 2015
    Inventors: Masahiro HIGASHI, Yosuke KISHIKAWA, Atsushi SHIRAI, Takashi NAMIKAWA, Sumi ISHIHARA, Shoji HARA
  • Publication number: 20060025688
    Abstract: A blood flow visualizing diagnostic apparatus characterized by having an ultrasonic measurement unit 120 which emits an ultrasonic beam toward a blood vessel inside a human body to receive the reflected ultrasonic signal, an analysis processing unit 220 which obtains a blood vessel shape and a blood flow velocity in the blood vessel by the received signal, a simulation unit 244 which sets computational lattices on the basis of the blood vessel shape obtained by the analysis processing unit 220 to simulate the blood flow velocity and a pressure distribution, a feedback unit 246 which computes an error between the blood flow velocity obtained by the analysis processing unit and the blood flow velocity obtained by the simulation unit 244 to feed back the error to the simulation unit 244, and display units 260 and 140 which display the blood flow velocity and the pressure distribution output from the simulation unit after the feedback.
    Type: Application
    Filed: October 2, 2003
    Publication date: February 2, 2006
    Applicant: TOHOKU TECHNO ARCH CO. LTD.
    Inventors: Toshiyuki Hayase, Kenichi Funamoto, Atsushi Shirai, Tomoyuki Yambe, Yoshifumi Saijo
  • Patent number: 5122235
    Abstract: Disclosed herein is a process for removing chloroprene by subjecting chloroprene-containing 1,2-dichloroethane to heat treatment at a temperature in the range of from the boiling point (85.degree. C.) of 1,2-dichloroethane to the thermal cracking temperature (300.degree. C.) of 1,2-dichloroethane. In particular, the process can be suitably applied to a liquid distillate from a low-boiling material separation column in a step in which 1,2-dichloroethane used as a raw material for production of vinyl chloride is purified by using a fractionation column.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: June 16, 1992
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Kenji Shirai, Seiji Nagae, Tadashi Naito, Atsushi Shirai