Patents by Inventor Tateo Seo
Tateo Seo 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: 8257557Abstract: A dehydration method for removing water from a hydrolysis reaction mixture containing unreacted water generated when monochlorobenzene is hydrolyzed to produce phenol, the method for dehydrating the hydrolysis reaction mixture includes supplying a hydrolysis reaction mixture to a distillation tower, supplying a liquid containing monochlorobenzene to the tower top portion of the distillation tower, and removing the substantially whole amount of the water in the hydrolysis reaction mixture together with monochlorobenzene from the tower top portion by distillation.Type: GrantFiled: August 29, 2006Date of Patent: September 4, 2012Assignee: Sumitomo Chemical Company, LimitedInventors: Tateo Seo, Tetsuya Suzuta, Toshiaki Ui
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Patent number: 7915434Abstract: A method for producing propylene oxide comprising a step of reacting hydrogen peroxide with propylene in the presence of an epoxidation catalyst in a liquid phase to produce propylene oxide and a step of recovering a recyclable constituent in a vent gas generated in the above step by absorbing the recyclable constituent in a solvent containing a nitrile.Type: GrantFiled: April 26, 2007Date of Patent: March 29, 2011Assignee: Sumitomo Chemical Company, LimitedInventors: Tateo Seo, Hiroaki Abekawa
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Patent number: 7807855Abstract: The invention provides a process for producing a hydroxy compound including the following steps: (a) chlorination step: a step of producing a chlorinated hydrocarbon and hydrogen chloride from a hydrocarbon and chlorine; (b) hydrolysis step: a step of producing a hydroxy compound and hydrogen chloride from the chlorinated hydrocarbon and water; and (c) oxidation step: a step of producing chlorine by reaction of oxygen and hydrogen chloride obtained in the chlorination step and/or the hydrolysis step, and (d) recycling at least a portion of the chlorine to the chlorination step.Type: GrantFiled: October 4, 2005Date of Patent: October 5, 2010Assignee: Sumitomo Chemical Company, LimitedInventors: Toshiaki Ui, Tetsuya Suzuta, Tateo Seo
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Publication number: 20090270641Abstract: A method for producing propylene oxide comprising a step of reacting hydrogen peroxide with propylene in the presence of an epoxidation catalyst in a liquid phase to produce propylene oxide and a step of recovering a recyclable constituent in a vent gas generated in the above step by absorbing the recyclable constituent in a solvent containing a nitrile.Type: ApplicationFiled: April 26, 2007Publication date: October 29, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Tateo Seo, Hiroaki Abekawa
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Publication number: 20090209782Abstract: A method of producing methyl methacrylate comprising the following steps: Thermal decomposition step: a hydrocarbon having 3 or more carbon atoms is thermally decomposed to obtain a decomposed gas having a total content of propyne and propadiene of 2 wt % or more, Separation step: mixed liquid rich in propyne and propadiene is separated from the decomposed gas obtained in the thermal decomposition step, Propyne purification step: the mixed liquid rich in propyne and propadiene obtained in the separation step is subjected to extractive distillation, for separation into purified propyne, and crude propadiene containing propadiene as the main component, Isomerization step: the crude propadiene obtained in the propyne purification step is isomerized in the presence of an isomerization catalyst, to obtain crude propyne containing propyne as the main component, and Carbonylation step: the purified propyne obtained in the propyne purification step is reacted with carbon monoxide and methanol in the presence of aType: ApplicationFiled: March 28, 2007Publication date: August 20, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Masahiko Mizuno, Tateo Seo, Tetsuya Suzuta
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Publication number: 20090159422Abstract: A dehydration method for removing water from a hydrolysis reaction mixture containing unreacted water generated when monochlorobenzene is hydrolyzed to produce phenol, the method for dehydrating the hydrolysis reaction mixture comprising the steps of supplying a hydrolysis reaction mixture to a distillation tower, supplying a liquid containing monochlorobenzene to the tower top portion of the distillation tower, and removing the substantially whole amount of the water in the hydrolysis reaction mixture together with monochlorobenzene from the tower top portion by distillation.Type: ApplicationFiled: August 29, 2006Publication date: June 25, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Tateo Seo, Tetsuya Suzuto, Toshiaki Ui
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Publication number: 20090048470Abstract: The invention provides a process for producing a hydroxy compound comprising the following steps: chlorination step: a step of obtaining a chlorinated hydrocarbon and hydrogen chloride from a hydrocarbon and chlorine; hydrolysis step: a step of obtaining a hydroxy compound and hydrogen chloride from the chlorinated hydrocarbon and water; and oxidation step; a step of obtaining chlorine by reaction of oxygen and hydrogen chloride obtained in the chlorination step and/or the hydrolysis step, and recycling at least a portion of the chlorine to the chlorination step.Type: ApplicationFiled: October 4, 2005Publication date: February 19, 2009Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Toshiaki Ui, Tetsuya Suzuta, Tateo Seo
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Patent number: 7132579Abstract: A method for chlorine purification in which crude chlorine containing nitrogen and/or oxygen is purified to separate the nitrogen and oxygen from the chloride, characterized in that the crude chlorine containing nitrogen and/or oxygen is contacted with 1,2-dichloroethane to cause the 1,2-dichloroethane to absorb the chlorine contained in the crude chlorine, and a process for producing 1,2-dichloroethane which comprises reacting ethylene with the chlorine contained in the chlorine containing 1,2-dichloroethane.Type: GrantFiled: June 20, 2002Date of Patent: November 7, 2006Assignee: Sumitomo Chemical Company, LimitedInventors: Noriaki Oku, Tateo Seo, Kiyoshi Iwanaga
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Publication number: 20050148799Abstract: A process for oxidizing a liquid component with an oxygen-containing gas, wherein the oxidation is carried out under a condition of an agitation power per unit volume of 10.0 to 500 kg•m/sec/m3.Type: ApplicationFiled: February 7, 2003Publication date: July 7, 2005Inventors: Tateo Seo, Noriaki Oku
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Publication number: 20040179987Abstract: A method for chlorine purification in which crude chlorine containing nitrogen and/or oxygen is purified to separate the nitrogen and oxygen from the chloride, characterized in that the crude chlorine containing nitrogen and/or oxygen is contacted with 1,2-dichloroethane to cause the 1,2-dichloroethane to absorb the chlorine contained in the crude chlorine, and a process for producing 1,2-dichloroethane which comprises reacting ethylene with the chlorine contained in the chlorine containing 1,2-dichloroethane.Type: ApplicationFiled: December 11, 2003Publication date: September 16, 2004Inventors: Noriaki Oku, Tateo Seo, Kiyoshi Iwanaga
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Patent number: 6646140Abstract: A process for producing an oxirane compound from ethylbenzene hydroperoxide and an olefin in the presence of an immobilized catalyst bed, wherein the process satisfies the following conditions (1) to (4): (1) the catalyst bed is divided into n catalyst beds and the catalyst beds are used in series, wherein n is an integer of 2 or more, (2) fresh ethylbenzene hydroperoxide is divided into portions, which are supplied to respective inlets of the catalyst beds, (3) fresh olefin is supplied to the inlet of the first catalyst bed, and (4) the reaction mixture discharged from each outlet of respective catalyst beds excluding the final catalyst bed is supplied to the inlet of the subsequent catalyst bed.Type: GrantFiled: December 4, 2002Date of Patent: November 11, 2003Assignee: Sumitomo Chemical Company, LimitedInventors: Noriaki Oku, Tateo Seo
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Patent number: 6646138Abstract: A process for producing propylene oxide comprising the following steps: oxidation step: a step of obtaining isopropylbenzene hydroperoxide by oxidizing isopropylbenzene; epoxidation step: a step of obtaining propylene oxide and cumyl alcohol by reacting propylene with isopropylbenzene hydroperoxide obtained in the oxidation step; hydrogenolysis step: a step of obtaining isopropylbenzene by hydrogenolyzing cumyl alcohol obtained in the epoxidation step, and recycling this isopropylbenzene to the oxidation step as a raw material of the oxidation step; and organic acid removal step: a step of removing an organic acid out of the system in at least one point in said steps or between said steps.Type: GrantFiled: January 11, 2002Date of Patent: November 11, 2003Assignee: Sumitomo Chemical Company, LimitedInventors: Noriaki Oku, Tateo Seo
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Patent number: 6646139Abstract: A process for producing propylene oxide, which comprises steps described below, wherein the concentration of ethylbenzene in a solution containing isopropylbenzene to be recycled to the oxidation step is 10% by weight or less: oxidation step; a step in which isopropylbenzene is oxidized to obtain isopropylbenzene hydroperoxide, epoxidation step; a step in which isopropyl hydroperoxide obtained in the oxidation step is reacted with propylene to obtain propylene oxide and cumyl alcohol, and hydrogenolysis step; a step in which cumyl alcohol obtained in the epoxidation step is subjected to hydrogenolysis to obtain isopropylbenzene, and said isopropylbenzene is recycled to the oxidation step as a raw material for the oxidation step.Type: GrantFiled: October 30, 2002Date of Patent: November 11, 2003Assignee: Sumitomo Chemical Company, LimitedInventors: Tateo Seo, Junpei Tsuji
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Publication number: 20030153775Abstract: A process for producing an oxirane compound from ethylbenzene hydroperoxide and an olefin in the presence of an immobilized catalyst bed, wherein the process satisfies the following conditions (1) to (4):Type: ApplicationFiled: December 4, 2002Publication date: August 14, 2003Inventors: Noriaki Oku, Tateo Seo
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Publication number: 20030139615Abstract: A process for producing propylene oxide, which comprises steps described below, wherein the concentration of ethylbenzene in a solution containing isopropylbenzene to be recycled to the oxidation step is 10% by weight or less:Type: ApplicationFiled: October 30, 2002Publication date: July 24, 2003Inventors: Tateo Seo, Junpei Tsuji
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Publication number: 20020156334Abstract: A process for simultaneously producing a purified dicyclopentadiene and 5-ethylidene-2-norbornene from a crude dicyclopentadiene and 1,3-butadiene, which comprises the following steps of:Type: ApplicationFiled: March 25, 2002Publication date: October 24, 2002Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Tateo Seo
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Publication number: 20020151730Abstract: A process for producing propylene oxide comprising the following steps:Type: ApplicationFiled: January 11, 2002Publication date: October 17, 2002Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Noriaki Oku, Tateo Seo