Patents by Inventor Takehiro Chaki

Takehiro Chaki 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: 20210317054
    Abstract: The production method according to the present disclosure comprises obtaining a product containing the fluoroethane from a fluoroethylene by a reaction in the presence of catalysts. Each catalyst is formed by supporting a noble metal on a carrier. A reactor for performing the reaction is filled with a catalyst having a noble metal concentration of C1 mass % based on the entire catalyst and a catalyst having a noble metal concentration of C2 mass % based on the entire catalyst to form an upstream portion and a downstream portion, respectively; and C1<C2. The reaction is performed by bringing the fluoroethylene represented by formula (3) and hydrogen gas into contact with the upstream portion and the downstream portion in this order.
    Type: Application
    Filed: June 17, 2021
    Publication date: October 14, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tomoyuki IWAMOTO, Takashi USUI, Takehiro CHAKI, Tsubasa NAKAUE, Kazuhiro TAKAHASHI
  • Publication number: 20210309593
    Abstract: The production method according to the present disclosure comprises obtaining a product comprising a fluoroethane from a fluoroethylene by a reaction in the presence of at least one catalyst. The reaction is performed in two or more reaction zones. Each reaction zone comprises a catalyst, and the fluoroethylene is supplied to each reaction zone to perform the reaction.
    Type: Application
    Filed: June 17, 2021
    Publication date: October 7, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tomoyuki IWAMOTO, Takashi USUI, Takehiro CHAKI, Kazuhiro TAKAHASHI, Tsubasa NAKAUE
  • Publication number: 20210253502
    Abstract: The present disclosure provides a method for producing fluoroolefin represented by formula (1): CX1X2=CX3X4, wherein X1, X2, X3, and X4 are the same or different, and represent a hydrogen atom or a fluorine atom, with high selectivity. Specifically, the present disclosure is a method for producing a fluoroolefin represented by formula (1) described above, the method comprising a dehydrofluorination step of bringing a fluorocarbon represented by formula (2): CX1X2FCX3X4H, wherein X1, X2, X3, and X4 are as defined above, into contact with a metal catalyst to perform dehydrofluorination, the dehydrofluorination step being performed in the gas phase in the presence of water, the concentration of the water being less than 500 ppm relative to the fluorocarbon represented by formula (2).
    Type: Application
    Filed: April 22, 2019
    Publication date: August 19, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi USUI, Tsubasa NAKAUE, Takehiro CHAKI, Yuzo KOMATSU
  • Publication number: 20210246090
    Abstract: The present invention aims to provide an efficient method for obtaining a desired isomer of HFO-1132 from a composition comprising trans-1,2-difluoroethylene (HFO-1132(E)) and cis-1,2-difluoroethylene (HFO-1132(Z)). The present invention provides, as a means for solving the problem, a method for producing HFO-1132(E) and/or HFO-1132(Z), comprising steps (1) to (3): (1) supplying a composition comprising HFO-1132(E) and/or HFO-1132(Z) to a reactor filled with a catalyst to perform an isomerization reaction between the HFO-1132(E) and the HFO-1132(Z); (2) separating the reaction product obtained in step (1) into a first stream comprising the HFO-1132(E) as a main component, and a second stream comprising the HFO-1132(Z) as a main component; and (3) recycling the first stream or the second stream obtained in step (2) to the reactor, to subject the first stream or the second stream to the isomerization reaction.
    Type: Application
    Filed: June 13, 2019
    Publication date: August 12, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi USUI, Tsubasa NAKAUE, Yuzo KOMATSU, Kazuhiro TAKAHASHI, Takehiro CHAKI, Megumi KUSHIDA
  • Publication number: 20210230086
    Abstract: The present disclosure provides a method for producing HFC-143 that is not expensive, and that is more efficient than conventional methods. Specifically, the present disclosure provides a method for producing 1,1,2-trifluoroethane (HFC-143) that includes contacting at least one chlorine-containing compound selected from the group consisting of 1,1,2-trichloroethane (HCC-140), 1,2-dichloro-1-fluoroethane (HCFC-141), 1,1-dichloro-2-fluoroethane (HCFC-141a), (E,Z)-1,2-dichloroethylene (HCO-1130 (E,Z)), and (E,Z)-1-chloro-2-fluoroethylene (HCFO-1131 (E,Z)) with hydrogen fluoride to perform one or more fluorination reactions, thereby obtaining a reaction gas containing HFC-143, hydrogen chloride, and hydrogen fluoride.
    Type: Application
    Filed: April 12, 2021
    Publication date: July 29, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takehiro CHAKI, Tsubasa NAKAUE, Megumi KUSHIDA, Kazuhiro TAKAHASHI
  • Publication number: 20210147323
    Abstract: The present invention aims to provide an efficient method for obtaining a desired isomer of HFO-1132 from a composition comprising trans-1,2-difluoroethylene (HFO-1132(E)) and cis-1,2-difluoroethylene (HFO-1132(Z)). The present invention provides, as a means for solving the problem, a method for producing HFO-1132(E) and/or HFO-1132(Z), comprising steps (1) to (3): (1) supplying a composition comprising HFO-1132(E) and/or HFO-1132(Z) to a reactor filled with a catalyst to perform an isomerization reaction between the HFO-1132(E) and the HFO-1132(Z); (2) separating the reaction product obtained in step (1) into a first stream comprising the HFO-1132(E) as a main component, and a second stream comprising the HFO-1132(Z) as a main component; and (3) recycling the first stream or the second stream obtained in step (2) to the reactor, to subject the first stream or the second stream to the isomerization reaction.
    Type: Application
    Filed: January 29, 2021
    Publication date: May 20, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takashi USUI, Tsubasa NAKAUE, Yuzo KOMATSU, Kazuhiro TAKAHASHI, Takehiro CHAKI, Megumi KUSHIDA
  • Publication number: 20210070678
    Abstract: The present disclosure provides a method for producing fluoroolefin represented by formula (1): CX1X2?CX3X4, wherein X1, X2, X3, and X4 are the same or different, and represent a hydrogen atom or a fluorine atom, with high selectivity. Specifically, the present disclosure is a method for producing fluoroolefin represented by formula (1), wherein the method includes the step of performing dehydrofluorination by bringing a fluorocarbon represented by formula (2): CX1X2FCX3X4H, wherein X1, X2, X3, and X4 are as defined above, into contact with a base, and the dehydrofluorination step is performed in the liquid phase at a temperature of ?70° C. or higher to less than 120° C.
    Type: Application
    Filed: April 3, 2019
    Publication date: March 11, 2021
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tsubasa NAKAUE, Takashi USUI, Takehiro CHAKI
  • Patent number: 10829426
    Abstract: The present invention provides a composition comprising an HFO compound, the composition having excellent stability with decomposition and oxidation of the HFO compound being inhibited, the composition having improved refrigerating capacity when used as a heat transfer medium, compared with the case in which an HFO compound is used alone. More specifically, the present invention provides a composition comprising at least one HFO compound selected from the group consisting of HFO-1234yf, (E-/Z-)HFO-1234ze, and (E-/Z-)HFO-1225ye; and a chlorine-containing compound, wherein (1) the chlorine-containing compound is at least one member selected from the group consisting of CH2?CHCl, CHF?CHCl, CH2?CFCl, CF3Cl, CH3Cl, CF3CH2Cl, CClF?CHCl, and CHF?CCl2, and (2) the chlorine-containing compound is contained in an amount ranging from 1 to 500000 mass ppm.
    Type: Grant
    Filed: August 8, 2019
    Date of Patent: November 10, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takehiro Chaki, Daisuke Karube
  • Patent number: 10590051
    Abstract: The present invention provides a method for producing a target fluorine-containing olefin with high conversion and selectivity using a process comprising a dehydrofluorination reaction of a hydrofluorocarbon. The method comprises a first reaction step comprising subjecting a hydrofluorocarbon to dehydrofluorination in the presence of a catalyst. The hydrofluorocarbon is a compound represented by Formula (1): RfCFYCHZ2, wherein Rf represents a straight or branched C1-3 perfluoroalkyl group, and Y and Z each independently represent H or F wherein when all Zs are H, Y represents F. The catalyst comprises chromium oxide represented by the chemical formula: CrOm (1.5<m<3).
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: March 17, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takehiro Chaki, Shun Ohkubo, Daisuke Karube
  • Patent number: 10590049
    Abstract: The present invention provides a method for producing tetrafluoropropene represented by formula (1) by bringing monochlorotrifluoropropene represented by formula (2) into contact with anhydrous hydrogen fluoride in the presence of a catalyst, the method being capable of maintaining the conversion of the starting material and the selectivity for the target product within an excellent range, while reducing degradation of the catalyst to maintain the reaction for a long time.
    Type: Grant
    Filed: February 3, 2017
    Date of Patent: March 17, 2020
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Shun Ohkubo, Takashi Usui, Takehiro Chaki, Daisuke Karube
  • Publication number: 20200031745
    Abstract: The present invention provides a composition comprising an HFO compound, the composition having excellent stability with decomposition and oxidation of the HFO compound being inhibited, the composition having improved refrigerating capacity when used as a heat transfer medium, compared with the case in which an HFO compound is used alone. More specifically, the present invention provides a composition comprising at least one HFO compound selected from the group consisting of HFO-1234yf, (E-/Z-)HFO-1234ze, and (E-/Z-)HFO-1225ye; and a chlorine-containing compound, wherein (1) the chlorine-containing compound is at least one member selected from the group consisting of CH2?CHCl, CHF?CHCl, CH2?CFCl, CF3Cl, CH3Cl, CF3CH2Cl, CClF?CHCl, and CHF?CCl2, and (2) the chlorine-containing compound is contained in an amount ranging from 1 to 500000 mass ppm.
    Type: Application
    Filed: August 8, 2019
    Publication date: January 30, 2020
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Takehiro CHAKI, Daisuke KARUBE
  • Patent number: 10472309
    Abstract: The present invention provides a composition comprising an HFO compound, the composition having excellent stability with decomposition and oxidation of the HFO compound being inhibited, the composition having improved refrigerating capacity when used as a heat transfer medium, compared with the case in which an HFO compound is used alone. More specifically, the present invention provides a composition comprising at least one HFO compound selected from the group consisting of HFO-1234yf, (E-/Z-)HFO-1234ze, and (E-/Z-)HFO-1225ye; and a chlorine-containing compound, wherein (1) the chlorine-containing compound is at least one member selected from the group consisting of CH2?CHCl, CHF?CHCl, CH2?CFCl, CF3Cl, CH3Cl, CF3CH2Cl, CClF?CHCl, and CHF?CCl2, and (2) the chlorine-containing compound is contained in an amount ranging from 1 to 500000 mass ppm.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: November 12, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takehiro Chaki, Daisuke Karube
  • Patent number: 10392326
    Abstract: The present invention provides an economically advantageous method for efficiently producing a fluorine-containing compound while ensuring high conversion of the starting compound, reducing production of 245cb, and reducing equipment costs and energy costs.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: August 27, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Daisuke Karube, Takehiro Chaki
  • Publication number: 20190039975
    Abstract: The present invention provides a method for producing tetrafluoropropene represented by formula (1) by bringing monochlorotrifluoropropene represented by formula (2) into contact with anhydrous hydrogen fluoride in the presence of a catalyst, the method being capable of maintaining the conversion of the starting material and the selectivity for the target product within an excellent range, while reducing degradation of the catalyst to maintain the reaction for a long time.
    Type: Application
    Filed: February 3, 2017
    Publication date: February 7, 2019
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Shun OHKUBO, Takashi USUI, Takehiro CHAKI, Daisuke KARUBE
  • Patent number: 10196331
    Abstract: This invention provides a method for producing 2,3,3,3-tetrafluoropropene or 2-chloro-1,1,1,2-tetrafluoropropane, which is a precursor of 2,3,3,3-tetrafluoropropene, in two or three reaction steps, using at least one chlorine-containing compound selected from the group consisting of 1,1,1,2,3-pentachloropropane, 2,3-dichloro-1,1,1-trifluoropropane, and 1,1,2,3-tetrachloropropene as a starting material, the reaction products of at least two of the steps being supplied to the same distillation apparatus to subject the products to a separation operation simultaneously. With this method, 2,3,3,3-tetrafluoropropene or 2-chloro-1,1,1,2-tetrafluoropropane, which is a precursor of 2,3,3,3-tetrafluoropropene, can be efficiently produced with reduced energy and equipment costs in an economically advantageous manner.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: February 5, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Takehiro Chaki, Kazuhiro Takahashi, Tatsuya Takakuwa
  • Patent number: 10173952
    Abstract: This invention provides a method for stably producing 2,3,3,3-tetrafluoropropene for a long period of time wherein unreacted materials are reused after distillation without liquid-liquid separation to suppress catalyst deactivation.
    Type: Grant
    Filed: June 16, 2015
    Date of Patent: January 8, 2019
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsuya Takakuwa, Kazuhiro Takahashi, Daisuke Karube, Takehiro Chaki, Masayuki Kishimoto, Yuzo Komatsu
  • Publication number: 20180370877
    Abstract: This invention provides a method for stably producing 2,3,3,3-tetrafluoropropene for a long period of time while suppressing catalyst deactivation. This invention provides a method for producing 2,3,3,3-tetrafluoropropene, the method comprising: (d) reacting 2-chloro-3,3,3-trifluoropropene with hydrogen fluoride in the presence of a catalyst; (e) subjecting the reaction mixture obtained in step (d) to distillation to separate the mixture into a first stream comprising 2,3,3,3-tetrafluoropropene as a main component and a second stream comprising unreacted hydrogen fluoride and organic matter containing unreacted 2-chloro-3,3,3-trifluoropropene as main components; and (f) recycling the second stream separated in step (e) above to the reaction of step (d), wherein the distillation of step (e) is performed under conditions that satisfy the relationship of a specific equation.
    Type: Application
    Filed: December 19, 2016
    Publication date: December 27, 2018
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Tatsuya TAKAKUWA, Kazuhiro TAKAHASHI, Daisuke KARUBE, Takehiro CHAKI, Masayuki KISHIMOTO, Yuzo KOMATSU
  • Patent number: 10125067
    Abstract: The present invention provides a method for producing a fluorine-containing alkane, which comprises reacting at least one fluorine-containing compound selected from the group consisting of chlorine-containing fluoroalkanes and fluorine-containing alkenes with hydrogen gas in the presence of catalysts, wherein two or more catalysts having different catalytic activities are used, and the fluorine-containing compound and hydrogen gas, which are starting materials, are sequentially brought into contact with the catalysts in the order of the catalyst having a lower catalytic activity followed by the catalyst having a higher catalytic activity. According to the present invention, in the method for producing a fluorine-containing alkane by using chlorine-containing fluoroalkane or fluorine-containing alkene as a starting material, and subjection it to a reduction reaction or a hydrogen addition reaction, the objective fluorine-containing alkane can be produced with high productivity.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: November 13, 2018
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Yuko Shiotani, Kakeru Hanabusa, Takehiro Chaki, Kazuhiro Takahashi
  • Publication number: 20180273448
    Abstract: The present invention provides an economically advantageous method for efficiently producing a fluorine-containing compound while ensuring high conversion of the starting compound, reducing production of 245cb, and reducing equipment costs and energy costs.
    Type: Application
    Filed: January 19, 2016
    Publication date: September 27, 2018
    Applicant: DAIKIN INDUSTRIES, LTD.
    Inventors: Daisuke KARUBE, Takehiro CHAKI
  • Patent number: 10053405
    Abstract: The present invention provides a method for producing a fluorine-containing haloolefin compound, said method being able to reduce the generation of overly fluorinated compounds as by-products in the production of the fluorine-containing haloolefin compound and produce the target product of high purity at a high yield. The invention also provides a halogenated hydrocarbon composition. The method for producing a haloolefin compound through the step of fluorinating a starting material containing at least one of a pentachloropropane or a tetrachloropropene in the presence of a fluorinating agent in a reactor, according to the present invention, includes the step of adding hydrogen chloride to the reactor. The composition according to the present invention contains: at least one member selected from the group consisting of a pentachloropropane and a tetrachloropropene; and hydrogen chloride.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: August 21, 2018
    Assignee: DAIKIN INDUSTRIES, LTD.
    Inventors: Daisuke Karube, Masayuki Kishimoto, Yuzo Komatsu, Takehiro Chaki