Patents Assigned to KH NEOCHEM CO., LTD.
-
Patent number: 11952329Abstract: A product 1,3-butylene glycol, wherein, in an HPLC analysis under specific conditions after specific sample preparation, when a relative retention time of 2,4-dinitrophenylhydrazine is regarded as 1.0, a sum area value of absorbance peaks that appear within a relative retention time range of 4.4 to 12.0 is 1000 or less, and wherein a dinitrophenylhydrazine derivative of a carbonyl compound having 4 to 6 carbon atoms is contained as a component that corresponds to the peaks that appear within the relative retention time range of 4.4 to 12.0.Type: GrantFiled: June 2, 2022Date of Patent: April 9, 2024Assignee: KH NEOCHEM CO., LTD.Inventors: Hirotaka Tanaka, Takashi Hakumura, Jun Kanada
-
Publication number: 20240083830Abstract: A product 1,3-butylene glycol, wherein, in an HPLC analysis under specific conditions after specific sample preparation, when a relative retention time of 2,4-dinitrophenylhydrazine is regarded as 1.0, a sum area value of absorbance peaks that appear within a relative retention time range of 4.4 to 12.0 is 1000 or less, and wherein a dinitrophenylhydrazine derivative of a carbonyl compound having 4 to 6 carbon atoms is contained as a component that corresponds to the peaks that appear within the relative retention time range of 4.4 to 12.0.Type: ApplicationFiled: June 2, 2022Publication date: March 14, 2024Applicant: KH Neochem Co., Ltd.Inventors: Hirotaka TANAKA, Takashi HAKUMURA, Jun KANADA
-
Publication number: 20240025831Abstract: A method for producing 3,5,5-trimethylhexanal by allowing diisobutylene (DIB), carbon monoxide and hydrogen to react with one another in the presence of a cobalt-based catalyst, comprising: a step of allowing DIB to react with carbon monoxide and hydrogen in the presence of a cobalt-based catalyst until a convention of DIB reaches 50 to 85% (first stage reaction step); a step of separating unreacted DIB from a reaction product obtained in the first stage reaction step (unreacted DIB separation step); and a step of allowing the unreacted DIB separated to react with carbon monoxide and hydrogen in the presence of a cobalt-based catalyst (second stage reaction step).Type: ApplicationFiled: December 2, 2021Publication date: January 25, 2024Applicant: KH Neochem Co., Ltd.Inventors: Shigehisa KISHIMOTO, Yusuke OHGATA, Youichi KANEDA, Kouji KITABATAKE
-
Publication number: 20230227389Abstract: A product 1,3-butylene glycol, in which 2,4-dinitrophenylhydrazine derivatives of 2-(hydroxyethyl)-2,6-dimethyl-1,3-dioxane have a weight proportion of 90 ppm or less, as calculated from a sum of absorbance of peaks thereof in an HPLC analysis under specific conditions after specific sample preparation.Type: ApplicationFiled: May 18, 2022Publication date: July 20, 2023Applicant: KH Neochem Co., Ltd.Inventors: Akihiro SUGURI, Tomohiro IWASA, Takashi HAKUMURA, Jun KANADA
-
Patent number: 10647901Abstract: Provided is a refrigerating machine oil composition for a mixed refrigerant comprising difluoromethane, the composition comprising a polymer (A) below and an ester (B) of polyhydric alcohol(s) with aliphatic monocarboxylic acid(s). The polymer (A): a polymer which is obtained by polymerizing monomer(s) consisting of at least one monomer of monosubstituted ethylenes and disubstituted ethylenes, and in which a ratio of a monomer represented by the following general formula (I): wherein R1 represents an alkyl group having 1 to 14 carbon atoms, R2 represents hydrogen or an alkyl group having 1 to 4 carbon atoms, and the sum of carbon numbers in R1 and R2 is 2 to 14, is 75 to 100% by mass based on a total mass of monomers constituting the polymer.Type: GrantFiled: September 29, 2016Date of Patent: May 12, 2020Assignee: KH NEOCHEM CO., LTD.Inventors: Takahiro Sawada, Junya Kishi, Aya Okita
-
Patent number: 10640691Abstract: Provided is a refrigerating machine oil composition for a refrigerant consisting of difluoromethane, the composition comprising a polymer (A) below and an ester (B) of polyhydric alcohol(s) with aliphatic monocarboxylic acid(s). The polymer (A): a polymer which is obtained by polymerizing monomer(s) consisting of at least one monomer of monosubstituted ethylenes and disubstituted ethylenes, and in which a ratio of a monomer represented by the following general formula (I): wherein R1 represents an alkyl group having 1 to 5 carbon atoms, R2 represents hydrogen or an alkyl group having 1 to 4 carbon atoms, and the sum of carbon numbers in R1 and R2 is 2 to 5, is 75 to 100% by mass based on a total mass of monomers constituting the polymer.Type: GrantFiled: September 29, 2016Date of Patent: May 5, 2020Assignee: KH NEOCHEM CO., LTD.Inventors: Takahiro Sawada, Junya Kishi, Aya Okita
-
Patent number: 10266788Abstract: The present invention provides a refrigerating-machine oil composition which comprises the following ester additive (a) and the following ester base oil (b), the content of the ester additive (a) being 5-45 mass % with respect to the total amount of the refrigerating-machine oil composition. Ester additive (a): At least one ester of isotridecanoic acid with pentaerythritol Ester base oil (b): Polyhydric-alcohol esters comprising esters of two or more aliphatic monocarboxylic acids selected from among C4-9 aliphatic monocarboxylic acids with pentaerythritol.Type: GrantFiled: February 6, 2015Date of Patent: April 23, 2019Assignee: KH NEOCHEM CO., LTD.Inventors: Satoshi Hiyoshi, Junya Kishi, Masato Kujime
-
Patent number: 9878974Abstract: Provided are an ester of isotridecanoic acid and pentaerythritol, etc., wherein (i) the kinematic viscosity at 40° C. is in the range of 80-140 mm2/sec. and (ii) the number of terminal methyl groups per molecule of isotridecanoic acid in the isotridecanoic acid obtained by 1H-NMR measurement is in the range of 2.6-3.4 on average.Type: GrantFiled: February 6, 2015Date of Patent: January 30, 2018Assignee: KH NEOCHEM CO., LTD.Inventors: Junya Kishi, Shinji Tanaka
-
Patent number: 9567284Abstract: To provide hexaester of bispentaerythritol monoformal, which is a mixed ester of bispentaerythritol monoformal represented by the following formula (I), and carboxylic acids: wherein the carboxylic acids comprise C9 branched aliphatic monocarboxylic acid, and any one of carboxylic acids selected from C4 to C8 aliphatic monocarboxylic acids. The hexaester is used as one component of a refrigerant oil composition, and gives excellent characteristics, such as oxidation stability, lubricity, and low temperature properties, to a refrigerant oil composition.Type: GrantFiled: October 22, 2013Date of Patent: February 14, 2017Assignee: KH NEOCHEM CO., LTD.Inventors: Shingo Nakayama, Takuya Nishimura, Toshihiro Inayama
-
Patent number: 9546334Abstract: Provided is a refrigerating machine oil which comprises an ester between a polyol consisting of at least one of pentaerythritol and dipentaerythritol represented by formula (I) and 2-propylheptanoic acid, and is characterized in that the refrigerating machine oil can be used in combination with a refrigerant consisting of 1,3,3,3-tetrafluoropropene (HFO-1234ze). When the refrigerating machine oil is used in combination with a refrigerant consisting of HFO-1234ze, excellent miscibility with the refrigerant, lubricity, thermal and chemical stability and the like can be achieved.Type: GrantFiled: July 31, 2014Date of Patent: January 17, 2017Assignee: KH NEOCHEM CO., LTD.Inventors: Junya Kishi, Yuichiro Nakai, Tomohiro Iwasa, Toshihiro Inayama
-
Patent number: 9523058Abstract: The present invention provides a mixed ester of pentaerythritol or a mixed polyhydric alcohol and carboxylic acids; the mixed polyhydric alcohol consisting of pentaerythritol and dipentaerythritol represented by formula (I), and the carboxylic acids comprising 2-ethylhexanoic acid and 2-propylheptanoic acid. The mixed ester exhibits excellent properties (e.g., miscibility with a refrigerant that comprises fluoropropene, low-temperature fluidity, and lubricity) in a well-balanced manner while having the viscosity within the range required for a refrigerant oil, and may be used in an industrial lubricant (e.g., refrigerant oil) and the like.Type: GrantFiled: March 4, 2013Date of Patent: December 20, 2016Assignee: KH NEOCHEM CO., LTD.Inventors: Junya Kishi, Yuichiro Nakai, Shinji Tanaka, Toshihiro Inayama
-
Publication number: 20160311751Abstract: To provide hexaester of bispentaerythritol monoformal, which is a mixed ester of bispentaerythritol monoformal represented by the following formula (I), and carboxylic acids: wherein the carboxylic acids comprise C9 branched aliphatic monocarboxylic acid, and any one of carboxylic acids selected from C4 to C8 aliphatic monocarboxylic acids. The hexaester is used as one component of a refrigerant oil composition, and gives excellent characteristics, such as oxidation stability, lubricity, and low temperature properties, to a refrigerant oil composition.Type: ApplicationFiled: October 22, 2013Publication date: October 27, 2016Applicant: KH Neochem Co., Ltd.Inventors: Shingo Nakayama, Takuya Nishimura, Toshihiro Inayama
-
Patent number: 9365484Abstract: Provided is hexaester of bispentaerythritol monoformal, which comprises the bispentaerythritol monoformal represented by the following formula (I), and any one of carboxylic acids selected from C8 and C9 branched aliphatic monocarboxylic acids: The hexaester has well-balanced excellent characteristics, such as low temperature properties and oxidation stability, and is used for industrial lubricating oil, such as a refrigerant oil composition.Type: GrantFiled: October 22, 2013Date of Patent: June 14, 2016Assignee: KH NEOCHEM CO., LTD.Inventors: Shingo Nakayama, Takuya Nishimura, Toshihiro Inayama
-
Patent number: 9328306Abstract: The present invention provides a mixed ester of pentaerythritol or a mixed polyhydric alcohol and carboxylic acids; the mixed polyhydric alcohol consisting of pentaerythritol and dipentaerythritol represented by formula (I), and the carboxylic acids comprising 3,5,5-trimethylhexanoic acid and 2-propylheptanoic acid. The mixed ester exhibits excellent properties (e.g., miscibility with a refrigerant that comprises fluoropropene, low-temperature properties, oxidation stability, oxidation-hydrolysis stability, and lubricity) in a well-balanced manner while having the viscosity within the range required for a refrigerant oil, and may be used in an industrial lubricant (e.g., refrigerant oil) and the like.Type: GrantFiled: January 31, 2013Date of Patent: May 3, 2016Assignee: KH NEOCHEM CO., LTD.Inventors: Junya Kishi, Yuichiro Nakai, Shinji Tanaka, Toshihiro Inayama
-
Publication number: 20150291502Abstract: Provided is hexaester of bispentaerythritol monoformal, which comprises the bispentaerythritol monoformal represented by the following formula (I), and any one of carboxylic acids selected from C8 and C9 branched aliphatic monocarboxylic acids: The hexaester has well-balanced excellent characteristics, such as low temperature properties and oxidation stability, and is used for industrial lubricating oil, such as a refrigerant oil composition.Type: ApplicationFiled: October 22, 2013Publication date: October 15, 2015Applicant: KH Neochem Co., Ltd.Inventors: Shingo Nakayama, Takuya Nishimura, Toshihiro Inayama
-
Patent number: 8772531Abstract: A neopentyl glycol diester which is a mixed ester of neopentyl glycol and carboxylic acids is provided, wherein the carboxylic acids consisting of isobutyric acid as well as 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid. The neopentyl glycol diester may be used in a refrigerant oil or the like which exhibits excellent miscibility with a difluoromethane refrigerant among other properties.Type: GrantFiled: June 30, 2011Date of Patent: July 8, 2014Assignee: KH Neochem Co., Ltd.Inventors: Toshihiro Inayama, Satoshi Hiyoshi, Junya Kishi, Masato Kujime
-
Patent number: 8772530Abstract: A pentaerythritol tetraester which is a mixed ester of pentaerythritol and carboxylic acids is provided, wherein the carboxylic acids consist of isobutyric acid and 3,5,5-trimethylhexanoic acid and the molar ratio of isobutyric acid to 3,5,5-trimethylhexanoic acid in the carboxylic acids is 36/64 to 80/20. The pentaerythritol tetraester may be used in a refrigerant oil or the like which exhibits excellent miscibility with a difluoromethane refrigerant among other properties.Type: GrantFiled: June 30, 2011Date of Patent: July 8, 2014Assignee: KH Neochem Co., Ltd.Inventors: Toshihiro Inayama, Satoshi Hiyoshi, Nobuhito Amemiya, Shigehisa Kishimoto
-
Patent number: 8664430Abstract: A pentaerythritol tetraester which is a mixed ester of pentaerythritol and carboxylic acids is provided, wherein the carboxylic acids comprise isobutyric acid and 2-ethylhexanoic acid and the molar ratio of isobutyric acid to 2-ethylhexanoic acid in the carboxylic acids is 36/64 to 83/17. The pentaerythritol tetraester may be used in a refrigerant oil or the like which exhibits excellent miscibility with a difluoromethane refrigerant among other properties.Type: GrantFiled: June 30, 2011Date of Patent: March 4, 2014Assignee: KH Neochem Co., Ltd.Inventors: Toshihiro Inayama, Satoshi Hiyoshi, Nobuhito Amemiya, Shigehisa Kishimoto
-
Publication number: 20130231498Abstract: A neopentyl glycol diester which is a mixed ester of neopentyl glycol and carboxylic acids is provided, wherein the carboxylic acids comprising isobutyric acid as well as 2-ethylhexanoic acid and/or 3,5,5-trimethylhexanoic acid. The neopentyl glycol diester may be used in a refrigerant oil or the like which exhibits excellent miscibility with a difluoromethane refrigerant among other properties.Type: ApplicationFiled: June 30, 2011Publication date: September 5, 2013Applicant: KH NEOCHEM CO., LTD.Inventors: Toshihiro Inayama, Satoshi Hiyoshi, Junya Kishi, Masato Kujime
-
Patent number: 8455413Abstract: An additive for oils that is capable of imparting oils such as lubricant base oils with superior wear resistance properties or friction resistance properties, and a lubricant. An additive for oils that includes a compound represented by formula (I) is used. A and B each represents a single bond or hydrocarbylene or the like, X and Y each represents a sulfur atom or single bond, and W and Z each represents a hydrogen atom or —NR1R2 or the like, provided that W and Z are not both hydrogen atoms. R1 and R2 each represents a hydrogen atom, a hydrocarbyl or a hydrocarbylcarbonyl or the like, and n and m each represents an integer of 0 to 5.Type: GrantFiled: May 7, 2008Date of Patent: June 4, 2013Assignee: KH Neochem Co., Ltd.Inventors: Satoshi Hiyoshi, Shingo Nakayama, Nobuhito Amemiya, Shigeaki Kato, Toshihiro Inayama, Yukihiro Isogai, Ichiro Minami, Shigeyuki Mori