Patents Assigned to Dia-Nitrix Co., Ltd.
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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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Patent number: 8614173Abstract: A water treatment method according to the present invention comprises adding an amphoteric polymer flocculant to polluted water to flocculate suspended solids so that the polluted water becomes treated water, and filtering the treated water. An inorganic flocculent can be added to the treated water after flocculation treatment before filtering the treated water.Type: GrantFiled: March 22, 2007Date of Patent: December 24, 2013Assignee: Dia-Nitrix Co., Ltd.Inventor: Shigeru Tanabe
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Patent number: 8445586Abstract: The present invention provides a process for producing an N-vinylamide polymer in an efficient manner by an aqueous solution polymerization method in which a gel-like polymer having an excellent handling property can be produced, and a polymerization time can be shortened. The process for producing an N-vinylamide polymer by subjecting a monomer component comprising N-vinylamide to aqueous solution polymerization according to the present invention comprises the step of polymerizing the monomer component comprising N-vinylamide in the presence of an inorganic salt, which inorganic salt is present in an amount of not less than 7% by mass based on water in a uniform aqueous solution comprising the monomer component at a concentration not more than a saturated solution concentration thereof as measured at a polymerization initiation temperature.Type: GrantFiled: June 29, 2009Date of Patent: May 21, 2013Assignee: Dia-Nitrix Co., Ltd.Inventor: Koji Shimizu
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Publication number: 20130059349Abstract: The present invention provides a more efficient method for producing acrylamide from acrylonitrile by the action of a microbially-derived enzyme, nitrile hydratase. More specifically, the present invention provides a method for producing acrylamide from acrylonitrile using a biocatalyst having nitrile hydratase, which comprises the step of keeping acrylonitrile while cooling to less than 30° C. Moreover, the present invention also provides an apparatus for producing acrylamide from acrylonitrile using a biocatalyst having nitrile hydratase.Type: ApplicationFiled: May 6, 2011Publication date: March 7, 2013Applicant: DIA-NITRIX CO., LTD.Inventors: Kozo Murao, Makoto Kano, Yuji Hirata
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Publication number: 20120276601Abstract: A method for producing acrylamide from acrylonitrile by a biocatalyst method, wherein both evaporation of acrylonitrile into a gas phase and damaging of a catalyst by stirring are prevented, is provided. In the present invention, the production of acrylamide from acrylonitrile by the biocatalyst method comprises feeding acrylonitrile into an aqueous medium comprising a microbial catalyst.Type: ApplicationFiled: December 21, 2010Publication date: November 1, 2012Applicant: Dia-Nitrix Co., Ltd.Inventors: Takamitsu Kariya, Hiroyasu Banba, Makoto Kano
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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: 8212067Abstract: An increase in the differential pressure in the distillation tower for the recovery of (meth)acrylonitrile is suppressed, and a stable and efficient operation is performed over a long time. A method for recovering (meth)acrylonitrile from a mixture containing (meth)acrylonitrile, acetonitrile and unsaturated compounds, in which the mixture is introduced into a distillation tower, distillation is performed under the conditions that the overhead liquid of the distillation tower contains (meth)acrylonitrile, acetonitrile is drawn out from the bottom and/or a side stream of the distillation tower, and a liquid containing the unsaturated compounds is drawn out from a site higher in position than the position of drawing acetonitrile.Type: GrantFiled: March 10, 2010Date of Patent: July 3, 2012Assignee: Dia-Nitrix Co., Ltd.Inventors: Shigeru Saitou, Takayoshi Miyake
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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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Publication number: 20110021819Abstract: The present invention provides a method for producing an amide compound from a nitrile compound using a biocatalyst that realizes low cost, energy saving and low environmental burdens. The production method of the amide compound of the present invention is a method for producing an amide compound from a nitrile compound using a biocatalyst in a reactor, wherein the nitrile compound is reacted with the biocatalyst to produce the amide compound under such stirring conditions that the stirring power requirement is in the range of 0.08 to 0.7 kW/m3.Type: ApplicationFiled: March 13, 2009Publication date: January 27, 2011Applicant: Dia-Nitrix Co., Ltd.Inventors: Makoto Kanou, Kiyonobu Niwa, Masahito Oda
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Publication number: 20110006258Abstract: The present invention provides a method for conveniently stabilizing an aqueous acrylamide solution using a stabilizer which can be separated and removed easily. In the method for stabilizing an aqueous acrylamide solution according to the present invention, a microbial cell is added to the aqueous acrylamide solution at a dried cell weight concentration of 1 to 14000 mg/L.Type: ApplicationFiled: March 12, 2009Publication date: January 13, 2011Applicant: DIA-NITRIX CO., LTD.Inventors: Masahito Oda, Katsuo Ishii
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Patent number: 7820416Abstract: In a method for producing an amide compound of the present invention including obtaining an amide compound from a nitrile compound using a microbial catalyst and transferring a solution containing the microbial catalyst and the amide compound, a positive-displacement pump is used for transferring the solution containing a microbial catalyst and an amide compound to obtain an amide compound having few impurities. A monomer including (meth)acrylamide obtained by the method for producing an amide compound is polymerized to prepare an acrylamide polymer having a high-molecular mass and high solubility and being colorless.Type: GrantFiled: December 28, 2005Date of Patent: October 26, 2010Assignee: Dia-Nitrix Co., Ltd.Inventors: Katsuo Ishii, Kozo Murao
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Publication number: 20100256410Abstract: An increase in the differential pressure in the distillation tower for the recovery of (meth)acrylonitrile is suppressed, and a stable and efficient operation is performed over a long time. A method for recovering (meth)acrylonitrile from a mixture containing (meth)acrylonitrile, acetonitrile and unsaturated compounds, in which the mixture is introduced into a distillation tower, distillation is performed under the conditions that the overhead liquid of the distillation tower contains (meth)acrylonitrile, acetonitrile is drawn out from the bottom and/or a side stream of the distillation tower, and a liquid containing the unsaturated compounds is drawn out from a site higher in position than the position of drawing acetonitrile.Type: ApplicationFiled: March 10, 2010Publication date: October 7, 2010Applicant: DIA-NITRIX CO., LTD.Inventors: Shigeru Saitou, Takayoshi Miyake
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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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Patent number: 7749739Abstract: This invention relates to a process for producing an amide compound from a nitrile compound using a microbial catalyst, wherein a microbial cell having nitrile hydratase activity of 50 U or higher per mg of dry cell at a reaction temperature of 10° C. is brought into contact with a nitrile compound in an aqueous medium without being immobilized. This method utilizes a microbial cell that exhibits high nitrile hydratase activity in the reaction without being entrap-immobilized. Thus, an amide compound can be effectively produced from a nitrile compound without problems of decreased reaction speed or lowered amount produced per unit cell amount, which are caused by entrap-immobilization. Accordingly, an amide compound can be produced within a very short period of time in the case of a batch reaction and with a very small-scale facility in the case of a continuous reaction.Type: GrantFiled: December 19, 2001Date of Patent: July 6, 2010Assignee: Dia-Nitrix Co., Ltd.Inventors: Kozo Murao, Katsuo Ishii
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Publication number: 20100032379Abstract: A method of treating sludge or wastewater involving the following steps: a swelling step which prepares a swelling liquid by adding a powdery polymer flocculant to water; a dissolution step which obtains an aqueous flocculant solution by supplying the swelling liquid to a filtration component and passing a filtering area of the filtration component; a flocculation treatment step which adds the aqueous flocculant solution to sludge or wastewater, wherein the total processing time from the time point where the powdery polymer flocculant was added to water until just before adding to sludge or wastewater to the aqueous flocculant solution is less than 3 hours.Type: ApplicationFiled: April 10, 2007Publication date: February 11, 2010Applicant: Dia-Nitrix Co., Ltd.Inventors: Toshiaki Komido, Masahiro Akimoto
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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