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公开(公告)号：US20190143304A1
公开(公告)日：2019-05-16
申请号：US16305782
申请日：2017-07-28
发明人： Eri TATENO , Minoru KADOWAKI
IPC分类号： B01J23/00 , B01J37/12 , B01J37/04 , B01J37/08 , C07C253/26
摘要： 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.
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公开(公告)号：US20210339239A1
公开(公告)日：2021-11-04
申请号：US17373342
申请日：2021-07-12
发明人： Eri TATENO , Minoru KADOWAKI
IPC分类号： B01J37/08 , C07C51/215 , B01J37/03 , B01J37/00 , B01J23/30 , C07C255/08 , B01J37/04 , B01J23/00 , C07C253/24 , C07B61/00
摘要： 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.
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公开(公告)号：US20190232270A1
公开(公告)日：2019-08-01
申请号：US16332732
申请日：2017-09-08
发明人： Eri TATENO , Minoru KADOWAKI
CPC分类号： B01J37/08 , B01J23/002 , B01J23/30 , B01J37/0027 , B01J37/031 , B01J37/04 , B01J2523/00 , B01J2523/3706 , B01J2523/3712 , B01J2523/3787 , B01J2523/44 , B01J2523/55 , B01J2523/56 , B01J2523/68 , B01J2523/69 , C07B61/00 , C07C51/215 , C07C253/24 , C07C255/08 , Y02P20/52 , B01J2523/53 , C07C57/04
摘要： 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.; 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, wherein, in the raw material preparation step and/or the aging step, precipitation of Nb is facilitated by performing at least one operation selected from the group consisting of the following (I) to (III): (I) in the raw material preparation step, the aqueous mixed liquid is prepared by mixing a Nb raw material liquid containing Nb with a MoVSb raw material liquid containing Mo, V, and Sb, wherein ammonia is added to at least one of the MoVSb raw material liquid, the Nb raw material liquid, and the aqueous mixed liquid such that a molar ratio in terms of NH3/Nb in the aqueous mixed liquid is adjusted to be 0.7 or more, and in the aging step, a temperature of the aqueous mixed liquid is adjusted to more than 50° C.; (II) in the aging step, a temperature of the aqueous mixed liquid is adjusted to more than 65° C.; and (III) in the raw material preparation step, the aqueous mixed liquid is prepared by mixing a Nb raw material liquid containing Nb with a MoVSb raw material liquid containing Mo, V, and Sb, wherein a molar ratio in terms of H2O2/Nb in the Nb raw material liquid is adjusted to less than 0.2, and in the aging step, a temperature of the aqueous mixed liquid is adjusted to more than 50° C.
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公开(公告)号：US20210230102A1
公开(公告)日：2021-07-29
申请号：US17051324
申请日：2018-05-15
发明人： Eri TATENO , Sho TAMURA
IPC分类号： C07C253/24 , B01J23/30 , B01J8/24 , B01J8/18 , B01J35/02
摘要： 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.
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公开(公告)号：US20180085737A1
公开(公告)日：2018-03-29
申请号：US15563381
申请日：2016-03-30
发明人： Satoshi MIIKE , Eri TATENO , Yusuke ISHII
CPC分类号： B01J23/30 , B01J23/002 , B01J35/023 , B01J37/04 , B01J37/08 , B01J2523/00 , C07B61/00 , C07C253/24 , C07C255/08 , Y02P20/52 , B01J2523/3712 , B01J2523/53 , B01J2523/55 , B01J2523/56 , B01J2523/68 , B01J2523/69
摘要： 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.
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