Patents by Inventor Tetsuya Suzuta
Tetsuya Suzuta 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).
-
Publication number: 20240010586Abstract: This method produces methanol with reduced dependency on fossil fuel. The method includes: a gas acquisition step of acquiring a gas (G1) containing hydrogen by a pyrolysis reaction and/or a dehydrogenation reaction of a hydrocarbon; and a conversion step of converting at least part of the gas (G1), and a source gas containing (G2) carbon oxide into methanol. In the conversion step, the reaction is allowed to proceed by condensing a high boiling point component containing converted methanol and water, and discharging the high boiling point component condensed to the outside of the reaction system.Type: ApplicationFiled: August 30, 2021Publication date: January 11, 2024Inventors: Masato MATSUDA, Tetsuya SUZUTA
-
Publication number: 20230312444Abstract: This method includes a gas acquisition step (S1) of obtaining a gas containing a carbon oxide and hydrogen from a waste material from which methanol is to be produced and a conversion step (S6) of bringing at least a portion of the gas into contact with a catalyst to convert the portion of the gas into methanol in a gas phase, in which, in the conversion step (S6), the reaction is allowed to proceed by condensing a high-boiling-point component containing methanol obtained as the result of the conversion and water and then discharging the condensed product to the outside of a reaction system.Type: ApplicationFiled: August 30, 2021Publication date: October 5, 2023Inventors: Masato MATSUDA, Tetsuya SUZUTA, Takehiro NAKASUJI, Yuichi SATO
-
Publication number: 20230311092Abstract: In a chemical reaction device that improves a yield of a product and that causes a reaction, progress of which in a gaseous phase is restricted by a chemical equilibrium between a source material and the product, a cumulative value is not less than 500 mm2, the cumulative value being obtained by cumulatively adding, from one end to the other end of a cooling surface in a height direction, products of (i) a distance L between (a) a surface of a catalyst layer which surface is in contact with a transmission wall and (b) an outer surface of the cooling surface and (ii) a height H of the catalyst layer corresponding to the outer surface having the distance L.Type: ApplicationFiled: August 30, 2021Publication date: October 5, 2023Inventors: Takehiro NAKASUJI, Tetsuya SUZUTA, Masato MATSUDA, Yuichi SATO
-
Publication number: 20220363617Abstract: A source material gas (31) is supplied to a catalyst (30), a first heating medium (21) is caused to flow through a first heat exchange section (22) so that a temperature of a surface of the first heat exchange section (22) on a catalyst side is maintained higher than a dew point of a reacted gas (32), a second heating medium (51) is caused to flow through a second heat exchange section (52) so that a temperature of a surface of the second heat exchange section (52) on a space (4) side is maintained not higher than the dew point of the reacted gas (32), and a liquid obtained by condensation in the space (4) is allowed to fall down so as to be separated from the source material gas.Type: ApplicationFiled: September 17, 2020Publication date: November 17, 2022Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Tetsuya SUZUTA, Masato MATSUDA, Takehiro NAKASUJI, Yuichi SATO
-
Publication number: 20220340521Abstract: The present specification discloses a method of producing a concentrated carbonate aqueous solution. The present invention relates to a method for producing a concentrated carbonate aqueous solution, comprising a step of dewatering a hydrogen carbonate aqueous solution by means of a salt blocking membrane to prepare a concentrated hydrogen carbonate aqueous solution, wherein the concentrated hydrogen carbonate aqueous solution obtained in the above step is heated to thermally decompose the hydrogen carbonate into carbonate, carbon dioxide and water, and to evaporate water to obtain a concentrate of the carbonate aqueous solution.Type: ApplicationFiled: September 11, 2020Publication date: October 27, 2022Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Takehiro NAKASUJI, Tetsuya SUZUTA, Masato MATSUDA, Yuichi SATO, Shinichi NAKAO
-
Patent number: 9682915Abstract: Production of methacrylic acid ester comprising a step of having acetone undergo a dehydration reaction in the presence of a dehydration reaction catalyst to obtain a reaction mixture; a step of separating a mixture containing propyne and propadiene as main components from the obtained reaction mixture; a step of separating the separated mixture containing propyne and propadiene as main components into a liquid, gas, or gas-liquid mixture containing propyne as a main component, and a liquid, gas, or gas-liquid mixture containing propadiene as a main component; and a step of bringing the obtained liquid, gas, or gas-liquid mixture containing propyne as a main component into contact with carbon monoxide and an alcohol having 1 to 3 carbon atoms in the presence of a catalyst containing at least one selected from the group consisting of Group 8 metal elements, Group 9 metal elements, and Group 10 metal elements.Type: GrantFiled: March 19, 2014Date of Patent: June 20, 2017Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kohei Seki, Tetsuya Suzuta, Naoki Miura
-
Publication number: 20160039738Abstract: Production of methacrylic acid ester comprising a step of having acetone undergo a dehydration reaction in the presence of a dehydration reaction catalyst to obtain a reaction mixture; a step of separating a mixture containing propyne and propadiene as main components from the obtained reaction mixture; a step of separating the separated mixture containing propyne and propadiene as main components into a liquid, gas, or gas-liquid mixture containing propyne as a main component, and a liquid, gas, or gas-liquid mixture containing propadiene as a main component; and a step of bringing the obtained liquid, gas, or gas-liquid mixture containing propyne as a main component into contact with carbon monoxide and an alcohol having 1 to 3 carbon atoms in the presence of a catalyst containing at least one selected from the group consisting of Group 8 metal elements, Group 9 metal elements, and Group 10 metal elements.Type: ApplicationFiled: March 19, 2014Publication date: February 11, 2016Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Kohei SEKI, Tetsuya SUZUTA, Naoki MIURA
-
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
-
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
-
Patent number: 7771674Abstract: The present invention relates to a multitubular catalytic gas-phase reaction apparatus, comprising a plurality of reaction tubes arranged in parallel, a baffle capable of changing the direction of movement of a heat medium introduced into a reactor shell to a direction perpendicular to the longitudinal direction of the reaction tubes, a space that is disposed in a region including a part of a section where the heat medium flows in the direction of the face of the baffle and does not have the reaction tubes arranged therein, and flow-adjusting rods, disposed in between the space and the reaction tubes, having the same longitudinal direction as that of the reaction tubes.Type: GrantFiled: September 26, 2005Date of Patent: August 10, 2010Assignee: Sumitomo Chemical Company, LimitedInventors: Tetsuya Suzuta, Yasuhiko Mori, Takaaki Tanaka, Tadashi Abe
-
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
-
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
-
Publication number: 20070297959Abstract: The present invention relates to a multitubular catalytic gas-phase reaction apparatus, comprising a plurality of reaction tubes arranged in parallel, a baffle capable of changing the direction of movement of a heat medium introduced into a reactor shell to a direction perpendicular to the longitudinal direction of the reaction tubes, a space that is disposed in a region including a part of a section where the heat medium flows in the direction of the face of the baffle and does not have the reaction tubes arranged therein, and flow-adjusting rods, disposed in between the space and the reaction tubes, having the same longitudinal direction as that of the reaction tubes.Type: ApplicationFiled: September 26, 2005Publication date: December 27, 2007Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Tetsuya Suzuta, Yasuhiko Mori, Takaaki Tanaka, Tadashi Abe
-
Patent number: 6977066Abstract: A process for producing chlorine comprising the step of oxidizing hydrogen chloride in a gas containing hydrogen chloride with a gas containing oxygen in the presence of a catalyst, wherein the oxidation of hydrogen chloride is carried out in at least two reaction zones each comprising a catalyst-packed layer, which are arranged in series, and a temperature in at least one of said reaction zones is controlled with a heat exchange system. According to this process, the stable activity of the catalyst is maintained and chlorine can be stably obtained at a high yield since the excessive hot spot in the catalyst-packed layer is suppressed and the catalyst-packed layer can be effectively used.Type: GrantFiled: January 19, 2000Date of Patent: December 20, 2005Assignee: Sumitomo Chemical Company, LimitedInventors: Kiyoshi Iwanaga, Tetsuya Suzuta, Yasuhiko Mori, Masayuki Yoshii
-
Publication number: 20050031529Abstract: A process for producing chlorine by oxidizing hydrogen chloride with oxygen. The process uses various supported ruthenium catalysts or a catalyst system containing (A) an active component of a catalyst and (B) a compound having thermal conductivity of a solid phase measured by at least one point within a range from 200 to 500° C. of not less than 4 W/m. ° C. Specifically, in the drafted Abstract, we proposed to delete the detailed description of various supported ruthenium catalysts which is present on pages 12 and 13 of the specification and in Claim 1.Type: ApplicationFiled: September 2, 2004Publication date: February 10, 2005Inventors: Takuo Hibi, Hiroaki Abekawa, Kohei Seki, Tatsuya Suzuki, Tetsuya Suzuta, Kiyoshi Iwanaga, Takahiro Oizumi
-
Patent number: 6852667Abstract: A process for producing chlorine by oxidizing hydrogen chloride with oxygen. The process uses various supported ruthenium catalysts or a catalyst system containing (A) an active component of a catalyst and (B) a compound having thermal conductivity of a solid phase measured by at least one point within a range from 200 to 500° C. of not less than 4 W/m. ° C.Type: GrantFiled: February 12, 1999Date of Patent: February 8, 2005Assignee: Sumitomo Chemical Company LimitedInventors: Takuo Hibi, Hiroaki Abekawa, Kohei Seki, Tatsuya Suzuki, Tetsuya Suzuta, Kiyoshi Iwanaga, Takahiro Oizumi
-
Patent number: 6713035Abstract: A process for producing chlorine comprising the step of oxidizing hydrogen chloride in a gas containing hydrogen chloride with a gas containing oxygen in a fixed bed reaction system having a reaction zone comprising a catalyst-packed layer, wherein a superficial linear velocity of the gas in a column is from 0.70 to 10 m/sec. According to this process, the stable activity of the catalyst is maintained and chlorine can be stably obtained at a high yield since the excessive hot spot in the catalyst-packed layer is suppressed and the catalyst-packed layer can be effectively used.Type: GrantFiled: July 20, 2001Date of Patent: March 30, 2004Assignee: Sumitomo Chemical Company, LimitedInventors: Kiyoshi Iwanaga, Masayuki Yoshii, Tetsuya Suzuta
-
Patent number: 6623547Abstract: The present invention provides a method for removing sulfuric acid mist wherein a gas containing sulfuric acid mist is bubbled into an absorbing solution through a gas diffuser having pores with an average pore diameter of about 1,000 &mgr;m or less. This method allows simple and highly effective removal of sulfuric acid mist.Type: GrantFiled: August 3, 2001Date of Patent: September 23, 2003Assignee: Sumitomo Chmical Company, LimitedInventors: Yasuhiko Mori, Tetsuya Suzuta
-
Patent number: 6469108Abstract: A naphthalene derivative, binaphthalene derivative and biphenyl derivative, all having an oxetane group, capable of being cationically polymerized and a cationically curable compound containing a naphthalene derivative having an oxetanyl group and an aromatic compound having an epoxy group or an oxetanyl group.Type: GrantFiled: December 13, 2001Date of Patent: October 22, 2002Assignee: Toagosei Co., Ltd.Inventors: Akira Kuriyama, Naokazu Ito, Tetsuya Suzuta, Takashi Tsuda
-
Publication number: 20020103330Abstract: A naphthalene derivative, binaphthalene derivative and biphenyl derivative, all having an oxetane group, capable of being cationically polymerized and a cationically curable compound containing a naphthalene derivative having an oxetanyl group and an aromatic compound having an epoxy group or an oxetanyl group.Type: ApplicationFiled: December 13, 2001Publication date: August 1, 2002Applicant: Toagosei Co., Ltd.Inventors: Akira Kuriyama, Naokazu Ito, Tetsuya Suzuta, Takashi Tsuda