Patents by Inventor Yoshichika Kuroki
Yoshichika Kuroki 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: 20240109826Abstract: A composition containing: a compound (2); a metal compound; and at least one selected from a compound (3) and a compound (4), the compound (3) being contained in an amount of 10000 ppm or less relative to the compound (2), the compound (4) being contained in an amount of 10000 ppm or less relative to the compound (2), the compound (2) being represented by the following formula (2): the compound (3) being represented by the following formula (3): and the compound (4) being represented by the following formula (4): wherein the various substituents of compounds (2), (3) and (4) are as defined herein.Type: ApplicationFiled: November 9, 2023Publication date: April 4, 2024Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yuuki SUZUKI, Akitoshi OGATA, Asako YOSHIYAMA, Makoto MATSUURA, Yoshichika KUROKI, Yosuke KISHIKAWA
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Patent number: 11945773Abstract: An object of the present invention is to provide a method for producing a propionic acid derivative with high productivity. The object can be achieved by a method for producing a compound represented by formula (1): wherein R1 is a halogen atom or the like, R2 and R3 are each independently a hydrogen atom, a halogen atom, or an organic group, X is an oxygen atom or a sulfur atom, R4 and R5 are each independently a hydrogen atom, a halogen atom, or a hydrocarbon group optionally having one or more substituents, R6 is a hydrocarbon group optionally having one or more substituents; the method comprising step A of reacting a compound represented by formula (2): with a compound represented by formula (3): M(R1)n, wherein M is a cation, n is an integer corresponding to the valence of M, and a compound represented by formula (4): R6—X—H; and step B of separating, by filtration, the compound represented by formula (5): MFn from the mixture obtained by the above reaction.Type: GrantFiled: March 18, 2022Date of Patent: April 2, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Atsushi Shirai, Asako Yoshiyama, Makoto Matsuura, Yoshichika Kuroki
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Publication number: 20240018081Abstract: An object of the present disclosure is to provide a method for producing a fluorinated organic compound, the method being capable of removing a sulfur-containing substance to a high degree, or provide a composition containing a fluorinated organic compound with a low content of a sulfur-containing substance. The present disclosure relates to a method for producing a fluorinated organic compound (pf), the method comprising: [A] reaction step A of fluorinating an organic sulfur compound (ss) with a fluorinating agent to obtain a composition (?) containing a fluorinated organic compound (pf); and [B] post-treatment step B of reacting the composition (?) with a nucleophile at a temperature of 40° C. or higher.Type: ApplicationFiled: September 25, 2023Publication date: January 18, 2024Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Atsushi SHIRAI, Yoshichika KUROKI, Yuusuke ETOU, Masayuki KISHIMOTO, Takashi NAMIKAWA, Sumi ISHIHARA, Makoto SUYAMA, Kenji ADACHI, Yosuke KISHIKAWA
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Publication number: 20230257333Abstract: The present disclosure provides a method for producing a composition comprising a purified fluorine-containing ether compound represented by formula (1): CHX1X2CF2OX3, wherein X1 and X2 are the same or different and each represents a hydrogen atom, a fluorine atom, or a trifluoromethyl group, and X3 represents a C1-6 alkyl group, provided that not both X1 and X2 are trifluoromethyl groups.Type: ApplicationFiled: April 18, 2023Publication date: August 17, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Daisuke KARUBE, Kenta NISHIMURA, Yuuki SUZUKI, Tsubasa NAKAUE, Yoshichika KUROKI, Michiaki OKADA
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Publication number: 20230250046Abstract: A method for producing a compound represented by formula (P1): (B1f)mp(A1)np, wherein B1f is RfCOO, Rf is a hydrocarbon having one or more fluorine atoms, A1 is a group excluding H, mp is (valence of A1)×np and is 1 or 2, np is mp/(valence of A1) and is 1, A1 has a valence of 1 or 2, the method comprising step A of reacting a compound represented by formula (S1): (B1f)(R1), wherein B1f is as defined above, and R1 is an organic group, and a compound represented by formula (S2): (A1)ms2(B2)ns2, wherein A1 is as defined above, B2 is OH, CO3, or HCO3, ms2 is (valence of B2)×ns2/(valence of A1) and is 1 or 2, and ns2 is (valence of A1)×ms2/(valence of B2) and 1 or 2, or a hydrate thereof. Such a method is a novel production method of a fluorinated carboxylic acid salt compound (preferably a fluorinated carboxylic acid salt compound having a low water content).Type: ApplicationFiled: March 8, 2023Publication date: August 10, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Atsushi SHIRAI, Shigeaki YAMAZAKI, Yoshichika KUROKI, Tatsuya OHTSUKA
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Patent number: 11718524Abstract: An object of this invention is to provide a simple method for producing sulfur tetrafluoride. The object is achieved by a method for producing sulfur tetrafluoride, comprising step A of reacting a fluorinated halogen compound with sulfur chloride, the fluorinated halogen compound being represented by formula: XFn, wherein X is chlorine, bromine, or iodine; and n is a natural number of 1 to 5.Type: GrantFiled: January 6, 2022Date of Patent: August 8, 2023Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya Ohtsuka, Yoshichika Kuroki, Atsushi Shirai, Moe Hosokawa, Yosuke Kishikawa
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Publication number: 20230242468Abstract: Provided is a novel production method for a fluorinated organic compound (1), the method comprising step A of fluorinating a hydrogen atom-containing organic compound (2) using IF5 in a liquid composition comprising an organic solvent, the amount of the hydrogen atom-containing organic compound (2) being 1.8 mol or more per liter of the organic solvent.Type: ApplicationFiled: March 29, 2023Publication date: August 3, 2023Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Atsushi SHIRAI, Takashi NAMIKAWA, Sumi ISHIHARA, Kenji ADACHI, Yosuke KISHIKAWA, Yoshichika KUROKI
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Publication number: 20230069592Abstract: An object of the present invention is to provide a novel method for producing a fluorine-containing methylene compound. The above object can be achieved by a method for producing a compound represented by formula (1): wherein R1 represents an organic group, RA represents hydrogen or fluorine, R4a represents hydrogen or an organic group, R4b represents hydrogen or an organic group, R5a represents hydrogen or an organic group, R5b represents hydrogen or an organic group, and R2 represents hydrogen or an organic group; R2 is optionally connected to R4a to form a ring; the method comprising step A of reacting a compound represented by formula (2): wherein X1 represents a leaving group, and other symbols are as defined above, with a compound represented by formula (3): wherein X2 represents a leaving group, and other symbols are as defined above, in the presence of a reducing agent as desired, under light irradiation.Type: ApplicationFiled: September 27, 2022Publication date: March 2, 2023Applicants: DAIKIN INDUSTRIES, LTD., UNIVERSITY PUBLIC CORPORATION OSAKAInventors: Makoto MATSUURA, Yoshichika KUROKI, Yosuke KISHIKAWA, Ilhyong RYU, Takahide FUKUYAMA
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Patent number: 11492322Abstract: An object of the present invention is to provide a novel method for producing a fluorine-containing methylene compound. The above object can be achieved by a method for producing a compound represented by formula (1): wherein R1 represents an organic group, RA represents hydrogen or fluorine, R4a represents hydrogen or an organic group, R4b represents hydrogen or an organic group, R5a represents hydrogen or an organic group, R5b represents hydrogen or an organic group, and R2 represents hydrogen or an organic group; R2 is optionally connected to R4a to form a ring; the method comprising step A of reacting a compound represented by formula (2): wherein X1 represents a leaving group, and other symbols are as defined above, with a compound represented by formula (3): wherein X2 represents a leaving group, and other symbols are as defined above, in the presence of a reducing agent as desired, under light irradiation.Type: GrantFiled: June 20, 2019Date of Patent: November 8, 2022Assignees: DAIKIN INDUSTRIES, LTD., UNIVERSITY PUBLIC CORPORATION OSAKAInventors: Makoto Matsuura, Yoshichika Kuroki, Yosuke Kishikawa, Ilhyong Ryu, Takahide Fukuyama
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Publication number: 20220259132Abstract: An object of the present invention is to provide a method for producing a propionic acid derivative with high productivity. The object can be achieved by a method for producing a compound represented by formula (1): wherein R1 is a halogen atom or the like, R2 and R3 are each independently a hydrogen atom, a halogen atom, or an organic group, X is an oxygen atom or a sulfur atom, R4 and R5 are each independently a hydrogen atom, a halogen atom, or a hydrocarbon group optionally having one or more substituents, RE is a hydrocarbon group optionally having one or more substituents; the method comprising step A of reacting a compound represented by formula (2): with a compound represented by formula (3): M(R1)n, wherein M is a cation, n is an integer corresponding to the valence of M, and a compound represented by formula (4): R6—X—H; and step B of separating, by filtration, the compound represented by formula (5): MFn from the mixture obtained by the above reaction.Type: ApplicationFiled: March 18, 2022Publication date: August 18, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Atsushi SHIRAI, Asako YOSHIYAMA, Makoto MATSUURA, Yoshichika KUROKI
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Patent number: 11377407Abstract: The problem to be solved by the present invention is to provide a novel method for producing a difluoromethylene compound, in particular, a simple method for producing a difluoromethylene compound. This problem is solved by a method for producing a difluoromethylene compound (I) containing at least one —CF2— moiety, the method comprising step A of allowing IF5 and a disulfide compound (III) of the formula: RA—S—S—RA (wherein RA, in each occurrence, independently represents aryl optionally having at least one substituent or alkyl optionally having at least one substituent) to act on a carbonyl compound (II) containing at least one —C(O)— moiety.Type: GrantFiled: April 25, 2019Date of Patent: July 5, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya Ohtsuka, Yoshichika Kuroki, Atsushi Shirai, Moe Hosokawa, Yosuke Kishikawa
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Patent number: 11339052Abstract: An object of this invention is to provide a simple method for producing sulfur tetrafluoride. The object is achieved by a method for producing sulfur tetrafluoride, comprising step A of reacting a fluorinated halogen compound with sulfur chloride, the fluorinated halogen compound being represented by formula: XFn, wherein X is chlorine, bromine, or iodine; and n is a natural number of 1 to 5.Type: GrantFiled: November 13, 2017Date of Patent: May 24, 2022Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya Ohtsuka, Yoshichika Kuroki, Atsushi Shirai, Moe Hosokawa, Yosuke Kishikawa
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Publication number: 20220127144Abstract: An object of this invention is to provide a simple method for producing sulfur tetrafluoride. The object is achieved by a method for producing sulfur tetrafluoride, comprising step A of reacting a fluorinated halogen compound with sulfur chloride, the fluorinated halogen compound being represented by formula: XFn, wherein X is chlorine, bromine, or iodine; and n is a natural number of 1 to 5.Type: ApplicationFiled: January 6, 2022Publication date: April 28, 2022Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya OHTSUKA, Yoshichika KUROKI, Atsushi SHIRAI, Moe HOSOKAWA, Yosuke KISHIKAWA
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Publication number: 20210371391Abstract: An object of the present disclosure is to provide a method for producing an organic compound, and a composition. The object is achieved by a method for producing a compound represented by formula (1): wherein X represents —O—, an optionally substituted imino group, or —S—, R1 represents a hydrogen atom or a hydrocarbyl group optionally having at least one substituent, and R2 represents a hydrogen atom or a monovalent organic group, or R1 and R2, together with X and one carbon atom respectively adjacent to R1 and R2, may form a heterocyclic ring optionally having at least one substituent, R3 represents a hydrogen atom or a monovalent organic group, and R4 represents —CF2CH3 or —CH2CHF2; the method including step A of reacting a compound represented by formula (2): wherein the alphabetical symbols are as defined above, with vinylidene fluoride under light irradiation.Type: ApplicationFiled: August 6, 2021Publication date: December 2, 2021Applicants: DAIKIN INDUSTRIES, LTD., NATIONAL UNIVERSITY CORPORATION SHIZUOKA UNIVERSITYInventors: Atsushi SHIRAI, Yoshichika KUROKI, Nobuyuki MASE
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Publication number: 20210363077Abstract: The problem to be solved by the present invention is to provide a novel method for producing a difluoromethylene compound, in particular, a simple method for producing a difluoromethylene compound. This problem is solved by a method for producing a difluoromethylene compound (I) containing at least one —CF2— moiety, the method comprising step A of allowing IF5 and a disulfide compound (III) of the formula: RA—S—S—RA (wherein RA, in each occurrence, independently represents aryl optionally having at least one substituent or alkyl optionally having at least one substituent) to act on a carbonyl compound (II) containing at least one —C(O)— moiety.Type: ApplicationFiled: April 25, 2019Publication date: November 25, 2021Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya OHTSUKA, Yoshichika KUROKI, Atsushi SHIRAI, Moe HOSOKAWA, Yosuke KISHIKAWA
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Publication number: 20210221766Abstract: An object of the present invention is to provide a novel method for producing a fluorine-containing methylene compound. The above object can be achieved by a method for producing a compound represented by formula (1): wherein R1 represents an organic group, RA represents hydrogen or fluorine, R4a represents hydrogen or an organic group, R4b represents hydrogen or an organic group, R5a represents hydrogen or an organic group, R5b represents hydrogen or an organic group, and R2 represents hydrogen or an organic group; R2 is optionally connected to R4a to form a ring; the method comprising step A of reacting a compound represented by formula (2): wherein X1 represents a leaving group, and other symbols are as defined above, with a compound represented by formula (3): wherein X2 represents a leaving group, and other symbols are as defined above, in the presence of a reducing agent as desired, under light irradiation.Type: ApplicationFiled: June 20, 2019Publication date: July 22, 2021Applicants: DAIKIN INDUSTRIES, LTD., UNIVERSITY PUBLIC CORPORATION OSAKAInventors: Makoto MATSUURA, Yoshichika KUROKI, Yosuke KISHIKAWA, Ilhyong RYU, Takahide FUKUYAMA
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Patent number: 10851031Abstract: The problem to be solved by the present invention is to provide a novel method for producing a difluoromethylene compound. This problem is solved by a method for producing a difluoromethylene compound containing a —CF2— moiety, the method comprising step A of mixing: a) a carbonyl compound containing a —C(O)— moiety; b) optionally an amine; c) a fluoride represented by the formula: MF, wherein M represents a Group 1 element of the periodic table; d) a halogenated fluorine compound represented by the formula: XFn, wherein X represents chlorine, bromine, or iodine, and n is a natural number of 1 to 5; and e) sulfur chloride.Type: GrantFiled: December 22, 2017Date of Patent: December 1, 2020Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya Ohtsuka, Yoshichika Kuroki, Atsushi Shirai, Moe Hosokawa, Yosuke Kishikawa
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Patent number: 10787406Abstract: This invention provides a composition that contains PFOB with a PFOA content lower than that of known PFOB, and that is less likely to have an adverse effect on the environment; and provides a method for producing PFOB. The composition contains C8F17Brand further contains C7F15COOH, wherein C7F15COOH is present in a concentration of 25 ppb or less based on the total weight of C8F17Br. The method for producing C8F17Br comprises reacting C8F17I and a brominating agent to obtain C8F17Br, and alkali-washing the obtained C8F17Br to reduce the C7F15COOH content to 25 ppb or less based on the total weight of C8F17Br.Type: GrantFiled: July 3, 2018Date of Patent: September 29, 2020Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Yoshichika Kuroki, Masahiro Higashi, Yoshihiro Yamamoto
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Publication number: 20200157028Abstract: This invention provides a composition that contains PFOB with a PFOA content lower than that of known PFOB, and that is less likely to have an adverse effect on the environment; and provides a method for producing PFOB. The composition contains C8F17Brand further contains C7F15COOH, wherein C7F15COOH is present in a concentration of 25 ppb or less based on the total weight of C8F17Br. The method for producing C8F17Br comprises reacting C8F17I and a brominating agent to obtain C8F17Br, and alkali-washing the obtained C8F17Br to reduce the C7F15COOH content to 25 ppb or less based on the total weight of C8F17Br.Type: ApplicationFiled: July 3, 2018Publication date: May 21, 2020Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yoshichika KUROKI, Masahiro HIGASHI, Yoshihiro YAMAMOTO
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Publication number: 20200087230Abstract: The problem to be solved by the present invention is to provide a novel method for producing a difluoromethylene compound. This problem is solved by a method for producing a difluoromethylene compound containing a —CF2— moiety, the method comprising step A of mixing: a) a carbonyl compound containing a —C(O)— moiety; b) optionally an amine; c) a fluoride represented by the formula: MF, wherein M represents a Group 1 element of the periodic table; d) a halogenated fluorine compound represented by the formula: XFn, wherein X represents chlorine, bromine, or iodine, and n is a natural number of 1 to 5; and e) sulfur chloride.Type: ApplicationFiled: December 22, 2017Publication date: March 19, 2020Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tatsuya OHTSUKA, Yoshichika KUROKI, Atsushi SHIRAI, Moe HOSOKAWA, Yosuke KISHIKAWA