Patents by Inventor Motoo Yanagita
Motoo Yanagita 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: 9334233Abstract: The invention relates to a method for producing acrylonitrile which includes a vapor phase catalytic ammoxidation process of performing vapor phase catalytic ammoxidation by bringing a source gas containing propylene, molecular oxygen, and ammonia into contact with a fluidized bed catalyst to obtain acrylonitrile. The method is characterized in that the fluidized bed catalyst is a catalyst containing molybdenum and bismuth and the vapor phase catalytic ammoxidation process is performed while maintaining an adsorbed amount of ammonia per specific surface area (m2/g) of the fluidized bed catalyst in the range of 0.05 to 0.6 ?mol/m2. According to the method for producing acrylonitrile of the invention, it is possible to stably maintain a high acrylonitrile yield over a long period of time.Type: GrantFiled: February 26, 2013Date of Patent: May 10, 2016Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Hirokazu Watanabe, Motoo Yanagita, Takashi Karasuda, Kazufumi Nishida, Kenichi Miyaki
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Patent number: 9328063Abstract: The invention relates to a method for producing acrylonitrile which includes a vapor phase catalytic ammoxidation process of performing vapor phase catalytic ammoxidation by bringing a source gas containing propylene, molecular oxygen, and ammonia into contact with a fluidized bed catalyst to obtain acrylonitrile. The method is characterized in that the fluidized bed catalyst consists of particles containing Fe, Sb, and Te, and the vapor phase catalytic ammoxidation process is performed while maintaining a B/A in the range of 2.0 to 5.0, where A denotes an atomic ratio of Te/Sb in a bulk composition of the fluidized bed catalyst and B denotes an atomic ratio of Te/Sb in a surface composition of the particles of the fluidized bed catalyst. According to the method for producing acrylonitrile of the invention, it is possible to stably maintain a high acrylonitrile yield over a long period of time.Type: GrantFiled: February 26, 2013Date of Patent: May 3, 2016Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Takashi Karasuda, Hirokazu Watanabe, Motoo Yanagita, Kazufumi Nishida
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Publication number: 20160008794Abstract: A catalyst for acrylonitrile production, which is produced by the vapor phase contact ammoxidation of propylene by molecular oxygen and ammonia, and a method for producing acrylonitrile using the catalyst.Type: ApplicationFiled: February 19, 2014Publication date: January 14, 2016Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Kazufumi NISHIDA, Motoo YANAGITA, Takashi KARASUDA, Hirokazu WATANABE
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Patent number: 9181178Abstract: The invention relates to a method for producing acrylonitrile which includes a vapor phase catalytic ammoxidation process of performing vapor phase catalytic ammoxidation by bringing a source gas containing propylene, molecular oxygen, and ammonia into contact with a fluidized bed catalyst to obtain acrylonitrile. The method is characterized in that the fluidized bed catalyst is a catalyst containing iron, antimony, and tellurium, and the vapor phase catalytic ammoxidation process is performed while maintaining an adsorbed amount of ammonia per specific surface area (m2/g) of the fluidized bed catalyst in the range of 0.01 to 0.22 ?mol/m2. According to the method for producing acrylonitrile of the invention, it is possible to stably maintain a high acrylonitrile yield over a long period of time.Type: GrantFiled: February 26, 2013Date of Patent: November 10, 2015Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Hirokazu Watanabe, Motoo Yanagita, Takashi Karasuda, Kazufumi Nishida, Kenichi Miyaki
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Patent number: 9040450Abstract: A process for producing a composite oxide catalyst which includes a step of preparing an aqueous slurry containing at least iron and antimony and composed of a liquid phase and a solid phase, a step of drying the aqueous slurry to obtain a dried material, and a step of calcining the obtained dried material, wherein of the precipitated particles having a particle size of not less than 1 ?m but less than 150 ?m contained within the aqueous slurry, the proportion of precipitated particles having a particle size of not less than 1 ?m but less than 10 ?m is within a range from 40 to 90% by volume, and the proportion of precipitated particles having a particle size of not less than 10 ?m but less than 150 ?m is within a range from 10 to 60% by volume.Type: GrantFiled: September 10, 2010Date of Patent: May 26, 2015Assignee: Dia-Nitrix Co., Ltd.Inventors: Kenichi Miyaki, Motoo Yanagita, Hirokazu Watanabe, Takashi Karasuda
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Publication number: 20150065744Abstract: The invention relates to a method for producing acrylonitrile which includes a vapor phase catalytic ammoxidation process of performing vapor phase catalytic ammoxidation by bringing a source gas containing propylene, molecular oxygen, and ammonia into contact with a fluidized bed catalyst to obtain acrylonitrile. The method is characterized in that the fluidized bed catalyst is a catalyst containing molybdenum and bismuth and the vapor phase catalytic ammoxidation process is performed while maintaining an adsorbed amount of ammonia per specific surface area (m2/g) of the fluidized bed catalyst in the range of 0.05 to 0.6 ?mol/m2. According to the method for producing acrylonitrile of the invention, it is possible to stably maintain a high acrylonitrile yield over a long period of time.Type: ApplicationFiled: February 26, 2013Publication date: March 5, 2015Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Hirokazu Watanabe, Motoo Yanagita, Takashi Karasuda, Kazufumi Nishida, Kenichi Miyaki
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Publication number: 20150057463Abstract: The invention relates to a method for producing acrylonitrile which includes a vapor phase catalytic ammoxidation process of performing vapor phase catalytic ammoxidation by bringing a source gas containing propylene, molecular oxygen, and ammonia into contact with a fluidized bed catalyst to obtain acrylonitrile. The method is characterized in that the fluidized bed catalyst is a catalyst containing iron, antimony, and tellurium, and the vapor phase catalytic ammoxidation process is performed while maintaining an adsorbed amount of ammonia per specific surface area (m2/g) of the fluidized bed catalyst in the range of 0.01 to 0.22 ?mol/m2. According to the method for producing acrylonitrile of the invention, it is possible to stably maintain a high acrylonitrile yield over a long period of time.Type: ApplicationFiled: February 26, 2013Publication date: February 26, 2015Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Hirokazu Watanabe, Motoo Yanagita, Takashi Karasuda, Kazufumi Nishida, Kenichi Miyaki
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Publication number: 20150031907Abstract: The invention relates to a method for producing acrylonitrile which includes a vapor phase catalytic ammoxidation process of performing vapor phase catalytic ammoxidation by bringing a source gas containing propylene, molecular oxygen, and ammonia into contact with a fluidized bed catalyst to obtain acrylonitrile. The method is characterized in that the fluidized bed catalyst consists of particles containing Fe, Sb, and Te, and the vapor phase catalytic ammoxidation process is performed while maintaining a B/A in the range of 2.0 to 5.0, where A denotes an atomic ratio of Te/Sb in a bulk composition of the fluidized bed catalyst and B denotes an atomic ratio of Te/Sb in a surface composition of the particles of the fluidized bed catalyst. According to the method for producing acrylonitrile of the invention, it is possible to stably maintain a high acrylonitrile yield over a long period of time.Type: ApplicationFiled: February 26, 2013Publication date: January 29, 2015Applicant: Mitsubishi Rayon Co., Ltd.Inventors: Takashi Karasuda, Hirokazu Watanabe, Motoo Yanagita, Kazufumi Nishida
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Publication number: 20120196744Abstract: A process for producing a composite oxide catalyst which includes a step of preparing an aqueous slurry containing at least iron and antimony and composed of a liquid phase and a solid phase, a step of drying the aqueous slurry to obtain a dried material, and a step of calcining the obtained dried material, wherein of the precipitated particles having a particle size of not less than 1 ?m but less than 150 ?m contained within the aqueous slurry, the proportion of precipitated particles having a particle size of not less than 1 ?m but less than 10 ?m is within a range from 40 to 90% by volume, and the proportion of precipitated particles having a particle size of not less than 10 ?m but less than 150 ?m is within a range from 10 to 60% by volume.Type: ApplicationFiled: September 10, 2010Publication date: August 2, 2012Applicant: Dia-Nitrix Co., LtdInventors: Kenichi Miyaki, Motoo Yanagita, Hirokazu Watanabe, Takashi Karasuda
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Patent number: 8034737Abstract: A catalyst for producing acrylonitrile capable of maintaining a high yield of acrylonitrile for a long time is provided. The catalyst has a composition represented by MoaBibFecWdRbeAfBgChDiOj(SiO2)k, wherein A is Ni, Mg, Ca, Sr, Ba, Mn, Co, Cu, Zn, Cd or mixture thereof; B is Al, Cr, Ga, Y, In, La, Ce, Pr, Nd, Sm or mixture thereof; C is Ti, Zr, V, Nb, Ta, Ge, Sn, Pb, Sb, P, B, Te or mixture thereof; D is Ru, Rh, Pd, Re, Os, Ir, Pt, Ag or mixture thereof; SiO2 is silica, when a is 10, b is 0.1 to 1.5, c is 0.5 to 3.0, d is 0.01 to 2.0, e is 0.02 to 1.0, f is 2.0 to 9.0, g is 0 to 5, h is 0 to 3, i is 0 to 2, k is 10 to 200; and j is the atomic ratio of oxygen determined by the valence of other elements (excluding silicon); and (a×2+d×2)/(b×3+c×3+e×1+f×2+g×3) is 0.90 to 1.00.Type: GrantFiled: February 26, 2009Date of Patent: October 11, 2011Assignee: Dia-Nitrix Co., Ltd.Inventors: Hirokazu Watanabe, Motoo Yanagita, Kenichi Miyaki
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Patent number: 8034736Abstract: A catalyst for synthesizing acrylonitrile that enables acrylonitrile to be synthesized at high yield, and a process for producing acrylonitrile using that catalyst, are provided. A catalyst for synthesizing acrylonitrile is used having a composition represented by FeaSbbCcDdTeeFfXxYyZzOg(SiO2)h. In the formula, component C represents at least one element selected from the group consisting of Cu, Ni and Co, component D from the group consisting of Mo, W and V, component F from the group consisting of P and B, component X from the group consisting of Sn, Ti, Zr, Nb, Ta, Cr, Ru, Pd, Ag, Al, Ga, In, Tl, Ge, As, Bi, La, Ce, Pr, Nd and Sm, component Y from the group consisting of Mg, Ca, Sr, Ba, Mn, Zn and Pb, and component Z from the group consisting of Li, Na, K, Rb and Cs, and SiO2 represents silica, when a=10, b=5 to 60, c=0.1 to 8.0, d=0.1 to 4.0, e=0.1 to 5.0, f=1.3 to 5.Type: GrantFiled: March 5, 2009Date of Patent: October 11, 2011Assignee: Dia-Nitrix Co., Ltd.Inventors: Kenichi Miyaki, Motoo Yanagita, Hirokazu Watanabe, Takashi Karasuda
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Patent number: 7902112Abstract: A fluidized bed catalyst for producing acrylonitrile capable of maintaining a high yield of acrylonitrile over a long time, and a process for producing acrylonitrile using the catalyst are provided. A fluidized bed catalyst for producing acrylonitrile having a composition represented by a following general formula: MoaBibFecWdNieMgfAgBhCiDjEkFlGmOn(SiO2)p In the formula, A represents Ce and La, B represents Ca, Sr, Ba, Mn, Co, Cu, Zn and Cd, C represents Y, Pr, Nd, Sm, Al, Cr, Ga and In, D represents Ti, Zr, V, Nb, Ta, Ge, Sn, Pb and Sb, E represents Ru, Rh, Pd, Re, Os, Ir, Pt and Ag, F represents P, B and Te, G represents Li, Na, K, Rb, Cs and Tl, SiO2 represents silica, when a=10, b=0.1 to 1.5, c=0.5 to 3, d=0.1 to 1.5, e=0.1 to 8, f=0.1 to 5, g=0.1 to 1.5, h=0 to 8, i=0 to 3, j=0 to 3, k=0 to 3, l=0 to 3, m=0.01 to 2, p=10 to 200 and n is the atomic ratio of oxygen required to satisfy the valence of each of the elements excluding silicon, and (a×2+d×2)/(b×3+c×3+e×2+f×2+g×3+h×2+i×3+m×1)=0.90 to 1.00).Type: GrantFiled: October 23, 2007Date of Patent: March 8, 2011Assignee: Dia-Nitrix Co., Ltd.Inventors: Motoo Yanagita, Kenichi Miyaki, Hirokazu Watanabe
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Patent number: 7807600Abstract: A catalyst for acrylonitrile synthesis is disclosed which is composed of particles containing silica and a composite oxide including at least molybdenum. When the Mo/Si atomic ratio in bulk composition of the catalyst is represented by A and the Mo/Si atomic ratio in surface composition of the particles is represented by B, B/A is not more than 0.6.Type: GrantFiled: April 14, 2004Date of Patent: October 5, 2010Assignee: Dia-Nitrix Co., Ltd.Inventors: Seigo Watanabe, Koichi Mizutani, Motoo Yanagita, Jinko Izumi
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Publication number: 20090270648Abstract: A fluidized bed catalyst for producing acrylonitrile capable of maintaining a high yield of acrylonitrile over a long time, and a process for producing acrylonitrile using the catalyst are provided. A fluidized bed catalyst for producing acrylonitrile having a composition represented by a following general formula: MoaBibFecWdNieMgfAgBhCiDjEkFlGmOn(SiO2)p In the formula, A represents Ce and La, B represents Ca, Sr, Ba, Mn, Co, Cu, Zn and Cd, C represents Y, Pr, Nd, Sm, Al, Cr, Ga and In, D represents Ti, Zr, V, Nb, Ta, Ge, Sn, Pb and Sb, E represents Ru, Rh, Pd, Re, Os, Ir, Pt and Ag, F represents P, B and Te, G represents Li, Na, K, Rb, Cs and Tl, SiO2 represents silica, when a=10, b=0.1 to 1.5, c=0.5 to 3, d=0.1 to 1.5, e=0.1 to 8, f=0.1 to 5, g=0.1 to 1.5, h=0 to 8, i=0 to 3, j=0 to 3, k=0 to 3, l=0 to 3, m=0.01 to 2, p=10 to 200 and n is the atomic ratio of oxygen required to satisfy the valence of each of the elements excluding silicon, and (a×2+d×2)/(b×3+c×3+e×2+f×2+g×3+h×2+i×3+m×1)=0.90 to 1.00).Type: ApplicationFiled: October 23, 2007Publication date: October 29, 2009Applicant: DIA-NITRIX CO., LTD.Inventors: Motoo Yanagita, Kenichi Miyaki, Hirokazu Watanabe
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Publication number: 20090234149Abstract: A catalyst for synthesizing acrylonitrile that enables acrylonitrile to be synthesized at high yield, and a process for producing acrylonitrile using that catalyst, are provided. A catalyst for synthesizing acrylonitrile is used having a composition represented by FeaSbbCcDdTeeFfXxYyZzOg(SiO2)h. In the formula, component C represents at least one element selected from the group consisting of Cu, Ni and Co, component D from the group consisting of Mo, W and V, component F from the group consisting of P and B, component X from the group consisting of Sn, Ti, Zr, Nb, Ta, Cr, Ru, Pd, Ag, Al, Ga, In, Tl, Ge, As, Bi, La, Ce, Pr, Nd and Sm, component Y from the group consisting of Mg, Ca, Sr, Ba, Mn, Zn and Pb, and component Z from the group consisting of Li, Na, K, Rb and Cs, and SiO2 represents silica, when a=10, b=5 to 60, c=0.1 to 8.0, d=0.1 to 4.0, e=0.1 to 5.0, f=1.3 to 5.Type: ApplicationFiled: March 5, 2009Publication date: September 17, 2009Applicant: DIA-NITRIX CO., LTD.Inventors: Kenichi Miyaki, Motoo Yanagita, Hirokazu Watanabe, Takashi Karasuda
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Publication number: 20090221843Abstract: A catalyst for producing acrylonitrile capable of maintaining a high yield of acrylonitrile for a long time is provided. The catalyst has a composition represented by MoaBibFecWdRbeAfBgChDiOj(SiO2)k, wherein A is Ni, Mg, Ca, Sr, Ba, Mn, Co, Cu, Zn, Cd or mixture thereof; B is Al, Cr, Ga, Y, In, La, Ce, Pr, Nd, Sm or mixture thereof; C is Ti, Zr, V, Nb, Ta, Ge, Sn, Pb, Sb, P, B, Te or mixture thereof; D is Ru, Rh, Pd, Re, Os, Ir, Pt, Ag or mixture thereof; SiO2 is silica, when a is 10, b is 0.1 to 1.5, c is 0.5 to 3.0, d is 0.01 to 2.0, e is 0.02 to 1.0, fis 2.0 to 9.0, g isO to 5, his 0 to 3, i isO to 2, k is 10 to 200; and j is the atomic ratio of oxygen determined by the valence of other elements (excluding silicon); and (a×2+d×2)/(b×3+c×3+e×1+f×2+g×3) is 0.90 to 1.00.Type: ApplicationFiled: February 26, 2009Publication date: September 3, 2009Applicant: DIA-NITRIX CO., LTD.Inventors: Hirokazu Watanabe, Motoo Yanagita, Kenichi Miyaki
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Patent number: 7365041Abstract: An ammoxidation catalyst comprising a molybdenum (component (1)), bismuth (component (2)), at least one element selected from the group consisting of nickel, cobalt, zinc, magnesium, manganese and copper (component (3)) and at least one element selected from the group consisting of lanthanum, cerium, praseodymium and neodymium (component (4)), over which an organic compound is subject to ammoxidation which is a composite oxide fluid bed catalyst, is prepared by i) preparing a first solution that comprises at least a portion of component (1), at least a portion of component (2), and at least a portion of component (3) but none of component (4); ii) preparing a second solution by adding a solution of component (4) to the first solution; and iii) drying the second solution obtained and calcining the solid matter obtained from the drying step.Type: GrantFiled: September 25, 2002Date of Patent: April 29, 2008Assignee: Dia-Nitrix Co., Ltd.Inventors: Kenichi Miyaki, Motoo Yanagita, Kunio Mori
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Publication number: 20060194693Abstract: A catalyst for acrylonitrile synthesis is disclosed which is composed of particles containing silica and a composite oxide including at least molybdenum. When the Mo/Si atomic ratio in bulk composition of the catalyst is represented by A and the Mo/Si atomic ratio in surface composition of the particles is represented by B, B/A is not more than 0.6.Type: ApplicationFiled: April 14, 2004Publication date: August 31, 2006Applicant: DIA-NITRIX CO., LTD.Inventors: Seigo Watanabe, Koichi Mizutani, Motoo Yanagita, Jinko Izumi
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Publication number: 20040248734Abstract: An object of the present invention is to provide a method for preparing a catalyst which is useful for synthesis of acrylonitrile due to ammoxidation of organic compounds, especially ammoxidation of propylene.Type: ApplicationFiled: April 1, 2004Publication date: December 9, 2004Inventors: Kenichi Miyaki, Motoo Yanagita, Kunio Mori