Patents by Inventor Eri Tateno
Eri Tateno 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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Patent number: 11905233Abstract: A process for producing unsaturated nitrile comprising a reaction step of subjecting hydrocarbon to a vapor phase catalytic ammoxidation reaction in a fluidized bed reactor to produce the corresponding unsaturated nitrile, wherein, in the reaction step, a powder is fed to a dense zone in the fluidized bed reactor using a carrier gas, and a ratio of a linear velocity LV1 of the carrier gas at a feed opening to feed the powder to the fluidized bed reactor to a linear velocity LV2 of a gas in the dense zone (LV1/LV2) is not less than 0.01 and not more than 1200.Type: GrantFiled: May 15, 2018Date of Patent: February 20, 2024Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Eri Tateno, Sho Tamura
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Patent number: 11806702Abstract: The present invention relates to a method for producing an oxide catalyst containing Mo, V, Sb, and Nb, the method including a raw material preparation step of obtaining an aqueous mixed liquid containing Mo, V, Sb, and Nb, an aging step of subjecting the aqueous mixed liquid to aging at more than 30° C., a drying step of drying the aqueous mixed liquid, thereby obtaining a dried powder, and a calcination step of calcining the dried powder, thereby obtaining the oxide catalyst, and a method for producing an unsaturated nitrile or an unsaturated acid by using the catalyst.Type: GrantFiled: July 12, 2021Date of Patent: November 7, 2023Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Eri Tateno, Minoru Kadowaki
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Publication number: 20210339239Abstract: The present invention relates to a method for producing an oxide catalyst containing Mo, V, Sb, and Nb, the method including a raw material preparation step of obtaining an aqueous mixed liquid containing Mo, V, Sb, and Nb, an aging step of subjecting the aqueous mixed liquid to aging at more than 30° C., a drying step of drying the aqueous mixed liquid, thereby obtaining a dried powder, and a calcination step of calcining the dried powder, thereby obtaining the oxide catalyst, and a method for producing an unsaturated nitrile or an unsaturated acid by using the catalyst.Type: ApplicationFiled: July 12, 2021Publication date: November 4, 2021Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Eri TATENO, Minoru KADOWAKI
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Patent number: 11141722Abstract: A method for producing an oxide catalyst according to the present invention is a method for producing an oxide catalyst containing Mo, V, Sb, and Nb, the method including: a raw material preparation step of obtaining an aqueous mixed liquid containing Mo, V, Sb, and Nb; an aging step of subjecting the aqueous mixed liquid to aging at more than 30° C.Type: GrantFiled: September 8, 2017Date of Patent: October 12, 2021Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Eri Tateno, Minoru Kadowaki
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Publication number: 20210230102Abstract: A process for producing unsaturated nitrile comprising a reaction step of subjecting hydrocarbon to a vapor phase catalytic ammoxidation reaction in a fluidized bed reactor to produce the corresponding unsaturated nitrile, wherein, in the reaction step, a powder is fed to a dense zone in the fluidized bed reactor using a carrier gas, and a ratio of a linear velocity LV1 of the carrier gas at a feed opening to feed the powder to the fluidized bed reactor to a linear velocity LV2 of a gas in the dense zone (LV1/LV2) is not less than 0.01 and not more than 1200.Type: ApplicationFiled: May 15, 2018Publication date: July 29, 2021Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Eri TATENO, Sho TAMURA
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Patent number: 10792643Abstract: A method for producing an oxide catalyst containing Mo, V, Sb, and Nb, the method including: a raw material preparation step including sub-step (I) of preparing an aqueous mixed liquid (A) containing Mo, V, and Sb, sub-step (II) of adding hydrogen peroxide to the aqueous mixed liquid (A), thereby facilitating oxidation of the aqueous mixed liquid (A) and obtaining an aqueous mixed liquid (A?), and sub-step (III) of mixing the aqueous mixed liquid (A?) and a Nb raw material liquid (B), thereby obtaining an aqueous mixed liquid (C); a drying step of drying the aqueous mixed liquid (C), thereby obtaining a dried powder; and a calcination step of calcining the dried powder under an inert gas atmosphere, wherein a time elapsed from addition of the hydrogen peroxide to the aqueous mixed liquid (A) to mixing the Nb raw material liquid (B) therewith is less than 5 minutes and the aqueous mixed liquid (A?) before being subjected to the sub-step (III) has an oxidation-reduction potential of 150 to 350 mV.Type: GrantFiled: July 28, 2017Date of Patent: October 6, 2020Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Eri Tateno, Minoru Kadowaki
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Publication number: 20190232270Abstract: A method for producing an oxide catalyst according to the present invention is a method for producing an oxide catalyst containing Mo, V, Sb, and Nb, the method including: a raw material preparation step of obtaining an aqueous mixed liquid containing Mo, V, Sb, and Nb; an aging step of subjecting the aqueous mixed liquid to aging at more than 30° C.Type: ApplicationFiled: September 8, 2017Publication date: August 1, 2019Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Eri TATENO, Minoru KADOWAKI
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Publication number: 20190143304Abstract: A method for producing an oxide catalyst containing Mo, V, Sb, and Nb, the method including: a raw material preparation step including sub-step (I) of preparing an aqueous mixed liquid (A) containing Mo, V, and Sb, sub-step (II) of adding hydrogen peroxide to the aqueous mixed liquid (A), thereby facilitating oxidation of the aqueous mixed liquid (A) and obtaining an aqueous mixed liquid (A?), and sub-step (III) of mixing the aqueous mixed liquid (A?) and a Nb raw material liquid (B), thereby obtaining an aqueous mixed liquid (C); a drying step of drying the aqueous mixed liquid (C), thereby obtaining a dried powder; and a calcination step of calcining the dried powder under an inert gas atmosphere, wherein a time elapsed from addition of the hydrogen peroxide to the aqueous mixed liquid (A) to mixing the Nb raw material liquid (B) therewith is less than 5 minutes and the aqueous mixed liquid (A?) before being subjected to the sub-step (III) has an oxidation-reduction potential of 150 to 350 mV.Type: ApplicationFiled: July 28, 2017Publication date: May 16, 2019Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Eri TATENO, Minoru KADOWAKI
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Patent number: 9950313Abstract: The present invention provides a method for producing an oxide catalyst comprising Mo, V, Sb, and Nb for use in a gas-phase catalytic oxidation reaction or a gas-phase catalytic ammoxidation reaction of propane or isobutane, the method comprising: a preparation step of preparing a first aqueous mixed solution containing Mo, V, and Sb; a mixing step of mixing the first aqueous mixed solution with a support raw material comprising silica sol, and a Nb raw material to obtain a second aqueous mixed solution; a drying step of drying the second aqueous mixed solution to obtain a dry powder; and a calcination step of calcining the dry powder to obtain the oxide catalyst, wherein the support raw material comprises 25% by mass or more, based on SiO2, of the silica sol having an average primary particle size of 3.0 nm or larger and smaller than 11 nm based on a total amount of the support raw material, and the silica sol comprises 55% or more of silica sol particles having a primary particle size of smaller than 11 nm.Type: GrantFiled: March 30, 2016Date of Patent: April 24, 2018Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Satoshi Miike, Eri Tateno, Yusuke Ishii
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Publication number: 20180085737Abstract: The present invention provides a method for producing an oxide catalyst comprising Mo, V, Sb, and Nb for use in a gas-phase catalytic oxidation reaction or a gas-phase catalytic ammoxidation reaction of propane or isobutane, the method comprising: a preparation step of preparing a first aqueous mixed solution containing Mo, V, and Sb; a mixing step of mixing the first aqueous mixed solution with a support raw material comprising silica sol, and a Nb raw material to obtain a second aqueous mixed solution; a drying step of drying the second aqueous mixed solution to obtain a dry powder; and a calcination step of calcining the dry powder to obtain the oxide catalyst, wherein the support raw material comprises 25% by mass or more, based on SiO2, of the silica sol having an average primary particle size of 3.0 nm or larger and smaller than 11 nm based on a total amount of the support raw material, and the silica sol comprises 55% or more of silica sol particles having a primary particle size of smaller than 11 nm.Type: ApplicationFiled: March 30, 2016Publication date: March 29, 2018Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Satoshi MIIKE, Eri TATENO, Yusuke ISHII
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Patent number: 9731285Abstract: An object of the present invention is to provide a process for producing an oxide catalyst used in a vapor-phase catalytic oxidation or vapor-phase catalytic ammoxidation reaction of propane or isobutene, which enables a catalyst demonstrating favorable yield to be stably produced. According to the present invention, there is provided a process for producing an oxide catalyst used in a vapor-phase catalytic oxidation or vapor-phase catalytic ammoxidation reaction of propane or isobutane, comprising the steps of: (i) preparing a catalyst raw material mixture containing Mo, V and Nb and satisfying the relationships of 0.1?a?1 and 0.01?b?1 when atomic ratios of V and Nb to one atom of Mo are defined as a and b, respectively; (ii) drying the catalyst raw material mixture; and (iii) calcining a particle, in which a content of the particle having a particle diameter of 25 ?m or less is 20% by mass or less and a mean particle diameter is from 35 to 70 ?m, in an inert gas atmosphere.Type: GrantFiled: December 11, 2008Date of Patent: August 15, 2017Assignee: ASAHI KASEI CHEMICALS CORPORATIONInventors: Eri Tateno, Masatoshi Kaneta
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Patent number: 9643918Abstract: Disclosed is a calcination apparatus, including: a calcination tube having open ends at both terminals; a pair of hoods, each hood covering each open end of the calcination tube; and a pair of rings, each ring sealing a gap between the calcination tube and the hood, wherein the rings are directly or indirectly fixed on an outer surface of the calcination tube; a groove is provided along a circumferential direction of the ring at a contact surface side between the ring and the hood; a sealed chamber surrounded by the hood and the groove is formed; and both the calcination tube and the rings rotate in a circumferential direction of the calcination tube while keeping the hood in contact with both sides of the groove.Type: GrantFiled: October 2, 2015Date of Patent: May 9, 2017Assignee: ASAHI KASEI CHEMICALS CORPORATIONInventors: Eri Tateno, Masatoshi Kaneta, Toshihiko Fukuzono, Haruhiko Watanabe
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Patent number: 9427727Abstract: Disclosed is a process for producing an oxide catalyst for use in the gas-phase catalytic oxidation reaction or the like of propane or the like, the process comprising the steps of: (I) obtaining a preparation containing compounds of Mo, V, Nb, and Sb or Te at the predetermined atomic ratios; (II) drying the preparation to obtain a dry powder; and (III) calcining the dry powder, wherein the step (III) comprises the step of calcining the dry powder in the presence of a compound containing W in the form of a solid to obtain a pre-stage calcined powder or a mainly calcined powder, or the step of calcining the dry powder and calcining the obtained pre-stage calcined powder in the presence of the solid to obtain a mainly calcined powder, the solid satisfies the predetermined conditions, and the oxide catalyst comprises a catalytic component having the predetermined composition.Type: GrantFiled: October 3, 2011Date of Patent: August 30, 2016Assignee: ASAHI KASEI CHEMICALS CORPORATIONInventors: Eri Tateno, Takeo Ichihara, Takaaki Kato
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Publication number: 20160023994Abstract: Disclosed is a calcination apparatus, including: a calcination tube having open ends at both terminals; a pair of hoods, each hood covering each open end of the calcination tube; and a pair of rings, each ring sealing a gap between the calcination tube and the hood, wherein the rings are directly or indirectly fixed on an outer surface of the calcination tube; a groove is provided along a circumferential direction of the ring at a contact surface side between the ring and the hood; a sealed chamber surrounded by the hood and the groove is formed; and both the calcination tube and the rings rotate in a circumferential direction of the calcination tube while keeping the hood in contact with both sides of the groove.Type: ApplicationFiled: October 2, 2015Publication date: January 28, 2016Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Eri TATENO, Masatoshi KANETA, Toshihiko FUKUZONO, Haruhiko WATANABE
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Patent number: 9180427Abstract: Disclosed is a calcination apparatus, including: a calcination tube having open ends at both terminals; a pair of hoods, each hood covering each open end of the calcination tube; and a pair of rings, each ring sealing a gap between the calcination tube and the hood, wherein the rings are directly or indirectly fixed on an outer surface of the calcination tube; a groove is provided along a circumferential direction of the ring at a contact surface side between the ring and the hood; a sealed chamber surrounded by the hood and the groove is formed; and both the calcination tube and the rings rotate in a circumferential direction of the calcination tube while keeping the hood in contact with both sides of the groove.Type: GrantFiled: February 10, 2012Date of Patent: November 10, 2015Assignee: ASAHI KASEI CHEMICALS CORPORATIONInventors: Eri Tateno, Masatoshi Kaneta, Toshihiko Fukuzono, Haruhiko Watanabe
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Publication number: 20140024851Abstract: Disclosed is a calcination apparatus, including: a calcination tube having open ends at both terminals; a pair of hoods, each hood covering each open end of the calcination tube; and a pair of rings, each ring sealing a gap between the calcination tube and the hood, wherein the rings are directly or indirectly fixed on an outer surface of the calcination tube; a groove is provided along a circumferential direction of the ring at a contact surface side between the ring and the hood; a sealed chamber surrounded by the hood and the groove is formed; and both the calcination tube and the rings rotate in a circumferential direction of the calcination tube while keeping the hood in contact with both sides of the groove.Type: ApplicationFiled: February 10, 2012Publication date: January 23, 2014Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Eri Tateno, Masatoshi Kaneta, Toshihiko Fukuzono, Haruhiko Watanabe
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Publication number: 20130289298Abstract: A method for producing an unsaturated nitrile by a propane ammoxidation reaction, the method including: a step of measuring at least one physical property value selected from the group consisting of the normalized UV value and the reduction ratio of a catalyst contained in a reactor, and a step of maintaining or changing a reaction condition based on the measured physical property value.Type: ApplicationFiled: January 13, 2012Publication date: October 31, 2013Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Eri Tateno, Sho Tamura, Takaaki Kato, Sadao Shoji
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Publication number: 20130225862Abstract: Disclosed is a process for producing an oxide catalyst for use in the gas-phase catalytic oxidation reaction or the like of propane or the like, the process comprising the steps of: (I) obtaining a preparation containing compounds of Mo, V, Nb, and Sb or Te at the predetermined atomic ratios; (II) drying the preparation to obtain a dry powder; and (III) calcining the dry powder, wherein the step (III) comprises the step of calcining the dry powder in the presence of a compound containing W in the form of a solid to obtain a pre-stage calcined powder or a mainly calcined powder, or the step of calcining the dry powder and calcining the obtained pre-stage calcined powder in the presence of the solid to obtain a mainly calcined powder, the solid satisfies the predetermined conditions, and the oxide catalyst comprises a catalytic component having the predetermined composition.Type: ApplicationFiled: October 3, 2011Publication date: August 29, 2013Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Eri Tateno, Takeo Ichihara, Takaaki Kato
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Patent number: 7919430Abstract: It is an object to provide a novel oxide catalyst for producing an unsaturated acid or unsaturated nitrile by which reaction results are good and a high yield can be stably maintained for a prolonged period of time, a process for producing the oxide catalyst, and a process for producing an unsaturated acid or unsaturated nitrile using the oxide catalyst. According to the present invention, there is provided an oxide catalyst represented by following compositional formula (1): Mo1VaSbbNbcMndWeYfOn??(1) wherein Y represents at least one element selected from alkaline earth metals and rare earth metals; a, b, c, d, e, f, and n each represents an atomic ratio based on one atom of Mo; 0.1?a?1, 0.01?b?1, 0.01?c?1, 0?d?0.1, 0?e?0.1, 0<(d+e)?0.1, 0?f?1; and n is a number determined by valencies of the constituent metals.Type: GrantFiled: March 15, 2007Date of Patent: April 5, 2011Assignee: Asahi Kasei Chemicals CorporationInventors: Eri Tateno, Satoru Komada
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Publication number: 20100286432Abstract: An object of the present invention is to provide a process for producing an oxide catalyst used in a vapor-phase catalytic oxidation or vapor-phase catalytic ammoxidation reaction of propane or isobutene, which enables a catalyst demonstrating favorable yield to be stably produced. According to the present invention, there is provided a process for producing an oxide catalyst used in a vapor-phase catalytic oxidation or vapor-phase catalytic ammoxidation reaction of propane or isobutane, comprising the steps of: (i) preparing a catalyst raw material mixture containing Mo, V and Nb and satisfying the relationships of 0.1?a?1 and 0.01?b?1 when atomic ratios of V and Nb to one atom of Mo are defined as a and b, respectively; (ii) drying the catalyst raw material mixture; and (iii) calcining a particle, in which a content of the particle having a particle diameter of 25 ?m or less is 20% by mass or less and a mean particle diameter is from 35 to 70 ?m, in an inert gas atmosphere.Type: ApplicationFiled: December 11, 2008Publication date: November 11, 2010Inventors: Eri Tateno, Masatoshi Kaneta