Patents by Inventor Megumi KUSHIDA
Megumi KUSHIDA 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).
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Publication number: 20230416175Abstract: An object is to provide an efficient method for producing HFC-143 or HFO-1132. Provided as a means for solution is a method for producing 1,1,2-trifluoroethane (HFC-143), comprising subjecting 1,1,2-trifluoroethylene to a reduction reaction with a reducing agent in the presence of a catalyst to obtain HFC-143.Type: ApplicationFiled: September 7, 2023Publication date: December 28, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kazuhiro TAKAHASHI, Takehiro CHAKI, Tsubasa NAKAUE, Tomoyuki IWAMOTO, Megumi KUSHIDA
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Patent number: 11780793Abstract: The present disclosure provides a method for producing HFC-143 at low cost and more efficiently than when using conventional methods. Specifically, the present disclosure provides a method for producing 1,1,2-trifluoroethane (HFC-143), comprising performing one or more fluorination reactions by bringing at least one chlorine-containing compound selected from the group consisting of 2-chloro-1,1-difluoroethane (HCFC-142) and 1-chloro-1,2-difluoroethane (HCFC-142a) into contact with hydrogen fluoride to obtain a reaction gas containing HFC-143, hydrogen chloride, and hydrogen fluoride.Type: GrantFiled: August 18, 2021Date of Patent: October 10, 2023Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takehiro Chaki, Tsubasa Nakaue, Megumi Kushida, Kazuhiro Takahashi
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Publication number: 20230272255Abstract: An object of the present disclosure is to provide a novel mixed refrigerant. A composition comprising a refrigerant, wherein the refrigerant comprises HFC-143 and/or HCFO-1131, and further comprises a specific additional compound is provided to achieve the object.Type: ApplicationFiled: May 2, 2023Publication date: August 31, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Megumi KUSHIDA, Tsubasa NAKAUE
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Publication number: 20230138340Abstract: An object of the present disclosure is to provide a method for producing HCFC-142, which is a target product, with high yield and high efficiency, by preventing the decomposition of starting materials, such as HCC-140 and HCO-1130. A method for producing HCFC-142, comprising bringing a chlorine-containing compound into contact with hydrogen fluoride in the presence of a stabilizer to perform at least one fluorination reaction, thus obtaining a reaction gas containing HCFC-142, hydrogen chloride, and hydrogen fluoride.Type: ApplicationFiled: December 27, 2022Publication date: May 4, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Megumi KUSHIDA, Kazuhiro TAKAHASHI, Tsubasa NAKAUE
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Publication number: 20220153664Abstract: Provided is a method for producing an olefin compound using reaction with a base, whereby a target product with a higher purity than the prior art can be obtained. Specifically, provided is a method for producing an olefin compound by reacting a phosphorus-containing olefin compound salt with a base to obtain a dephosphorized and hydrogenated olefin compound, wherein the temperature of the reaction is 50° C. or less.Type: ApplicationFiled: January 31, 2022Publication date: May 19, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yuuko ITO, Tsubasa NAKAUE, Takehiro CHAKI, Takashi USUI, Tomoyuki IWAMOTO, Megumi KUSHIDA
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Publication number: 20220144864Abstract: Provided is a method for purifying a phosphorus-containing olefin compound salt as a raw material or an intermediate that is useful to increase the purity of a target product in a method for producing an olefin compound and that can be applied to the production method, and a method for producing an olefin compound using a purified product obtained thereby.Type: ApplicationFiled: January 26, 2022Publication date: May 12, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yuuko ITO, Tsubasa NAKAUE, Takehiro CHAKI, Takashi USUI, Tomoyuki IWAMOTO, Megumi KUSHIDA
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Patent number: 11312673Abstract: 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: GrantFiled: April 12, 2021Date of Patent: April 26, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takehiro Chaki, Tsubasa Nakaue, Megumi Kushida, Kazuhiro Takahashi
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Patent number: 11247951Abstract: 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: GrantFiled: January 29, 2021Date of Patent: February 15, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Takashi Usui, Tsubasa Nakaue, Yuzo Komatsu, Kazuhiro Takahashi, Takehiro Chaki, Megumi Kushida
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Publication number: 20210395173Abstract: The present disclosure provides a method for producing HFC-143 at low cost and more efficiently than when using conventional methods. Specifically, the present disclosure provides a method for producing 1,1,2-trifluoroethane (HFC-143), comprising performing one or more fluorination reactions by bringing at least one chlorine-containing compound selected from the group consisting of 2-chloro-1,1-difluoroethane (HCFC-142) and 1-chloro-1,2-difluoroethane (HCFC-142a) into contact with hydrogen fluoride to obtain a reaction gas containing HFC-143, hydrogen chloride, and hydrogen fluoride.Type: ApplicationFiled: August 18, 2021Publication date: December 23, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takehiro CHAKI, Tsubasa NAKAUE, Megumi KUSHIDA, Kazuhiro TAKAHASHI
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Publication number: 20210363396Abstract: An object is to provide an azeotropic or azeotrope-like composition containing HFO-1132(E) and HFC-143a, and a method for separating HFO-1132(E) and HFC-143a from a composition containing HFO-1132(E) and HFC-143a. Provided as a solution to achieve the object is a composition containing a refrigerant, wherein the refrigerant is azeotropic or azeotrope-like and contains trans-1, 2-difluoroethylene (HFO-1132(E)) and 1,1,1-trifluoroethane (HFC-143a), and the proportion of HFO-1132(E) is 80 mass % or more and the proportion of HFC-143a is 20 mass % or less based on the total amount of HFO-1132(E) and HFC-143a in the refrigerant.Type: ApplicationFiled: August 5, 2021Publication date: November 25, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Kazuhiro TAKAHASHI, Tsubasa NAKAUE, Takehiro CHAKI, Takashi USUI, Megumi KUSHIDA
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Publication number: 20210246090Abstract: 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: ApplicationFiled: June 13, 2019Publication date: August 12, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takashi USUI, Tsubasa NAKAUE, Yuzo KOMATSU, Kazuhiro TAKAHASHI, Takehiro CHAKI, Megumi KUSHIDA
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Publication number: 20210230086Abstract: 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: ApplicationFiled: April 12, 2021Publication date: July 29, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takehiro CHAKI, Tsubasa NAKAUE, Megumi KUSHIDA, Kazuhiro TAKAHASHI
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Publication number: 20210147323Abstract: 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: ApplicationFiled: January 29, 2021Publication date: May 20, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Takashi USUI, Tsubasa NAKAUE, Yuzo KOMATSU, Kazuhiro TAKAHASHI, Takehiro CHAKI, Megumi KUSHIDA