Patents by Inventor Takehiko Muramatsu
Takehiko Muramatsu 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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Publication number: 20140335003Abstract: A carbon dioxide recovery system includes an absorption tower in which carbon dioxide is absorbed into an absorbing solution then the absorbing solution is output to a regeneration tower in which carbon dioxide is released from the absorbing solution. The regeneration tower outputs the absorbing solution from which carbon dioxide has been released and an exhaust gas included released carbon dioxide and water vapor. In a condensing section the exhaust gas is separated into dioxide gas stream and a condensed water stream. In a mixing section the condensed water is mixed with an amine to a replenishment amine aqueous solution in which the amine is dissolved in the condensed water. In a replenishment section the absorbing solution is mixed with the replenishment amine aqueous solution.Type: ApplicationFiled: May 8, 2014Publication date: November 13, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasuhiro KATO, Shinji MURAI, Takehiko MURAMATSU, Satoshi SAITO
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Publication number: 20140296576Abstract: A method for isolating an amino alcohol simply from an amino alcohol aqueous solution containing a heterocyclic amine compound is provided. The method is a method for isolating a tertiary amino alcohol from a tertiary amino alcohol aqueous solution containing a heterocyclic amine compound, and has generating an imine and/or enamine by adding an aldehyde and/or ketone to the tertiary amino alcohol aqueous solution, isolating the imine and/or enamine from the tertiary amino alcohol aqueous solution, and isolating the tertiary amino alcohol from a residual liquid obtained by isolating the imine and/or enamine.Type: ApplicationFiled: March 19, 2014Publication date: October 2, 2014Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Shinji MURAI, Takehiko MURAMATSU, Daigo MURAOKA, Satoshi SAITO
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Publication number: 20130343974Abstract: An acid gas absorbent comprising at least one type of diamine compound represented by the following general formula (1), R1R2N—(CHR3)n—CH2—NR4R5??(1), where R1, R2, R4 and R5 represent any of: a cyclic alkyl group having carbon number from 3 to 6; an alkyl group having carbon number from 1 to 4; a hydroxyalkyl group; and a hydrogen atom, R3 represents any of: the hydrogen atom; a methyl group; and an ethyl group, “n” represents an integer number of 1 or 2, at least one of two amino groups is a secondary amino group, both of the two amino groups are groups other than a primary amino group.Type: ApplicationFiled: June 20, 2013Publication date: December 26, 2013Inventors: Shinji MURAI, Yukishige MAEZAWA, Yasuhiro KATO, Takehiko MURAMATSU, Masatoshi HODOTSUKA, Satoshi SAITO
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Patent number: 8545783Abstract: There is provided an acid gas absorbent having excellent performance of absorbing acid gas such as carbon dioxide, and an acid gas removal device and an acid gas removal method using the acid gas absorbent. An acid gas absorbent of an embodiment contains at least one type of tertiary amine compound represented by the following general formula (1). (In the above formula (1), the cycle A represents a cyclic structure whose carbon number is not less than 3 nor more than 8. R1, R2 and R3 each represent an alkyl group whose carbon number is 1 to 4, and R4 represents a hydroxyalkyl group. R1 and R2 are groups coupled to carbon atoms adjacent to a carbon atom forming the cycle A and coupled to a nitrogen atom.Type: GrantFiled: May 18, 2012Date of Patent: October 1, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Shinji Murai, Yukishige Maezawa, Yasuhiro Kato, Takehiko Muramatsu, Masatoshi Hodotsuka
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Patent number: 8506913Abstract: An acidic gas absorbent having a high acidic gas absorption capacity, that is, a high acidic gas absorption amount and a high acidic gas absorption rate, an acidic gas absorption device, and a method for absorbing an acidic gas, are provided. An acidic gas absorbent containing an azabicyclo compound and a primary or secondary amine compound; an acidic gas absorbent containing a heteroaromatic ring compound and a primary or secondary amine compound; an acidic gas removal device using these acidic gas absorbents; and a method for removing an acidic gas are disclosed.Type: GrantFiled: March 29, 2010Date of Patent: August 13, 2013Assignee: Kabushiki Kaisha ToshibaInventors: Shinji Murai, Satoshi Saito, Yasuhiro Kato, Takehiko Muramatsu, Takashi Kuboki, Hiroko Watando, Asato Kondo, Yukishige Maezawa
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Publication number: 20120305840Abstract: An object of the present invention is to provide a carbon dioxide absorbing solution capable of avoiding precipitation of a product formed by the reaction with carbon dioxide. The absorbing solution is an aqueous solution characterized by containing an amino acid salt comprising at least one carboxylic acid salt connected to a heterocyclic ring including at least one nitrogen atom as the ring member atom.Type: ApplicationFiled: September 24, 2009Publication date: December 6, 2012Applicant: Kabushiki Kaisha ToshibaInventors: Shinji Murai, Satoshi Saito, Takehiko Muramatsu, Yukishige Maezawa, Takashi Kuboki, Yasuhiro Kato, Reiko Yoshimura, Hiroko Watando, Asato Kondo
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Publication number: 20120308451Abstract: There is provided an acid gas absorbent having excellent performance of absorbing acid gas such as carbon dioxide, and an acid gas removal device and an acid gas removal method using the acid gas absorbent. An acid gas absorbent of an embodiment contains at least one type of tertiary amine compound represented by the following general formula (1). (In the above formula (1), the cycle A represents acyclic structure whose carbon number is not less than 3 nor more than 8. R1, R2 and R3 each represent an alkyl group whose carbon number is 1 to 4, and R4 represents a hydroxyalkyl group. R1 and R2 are groups coupled to carbon atoms adjacent to a carbon atom forming the cycle A and coupled to a nitrogen atom.Type: ApplicationFiled: May 18, 2012Publication date: December 6, 2012Inventors: Shinji MURAI, Yukishige Maezawa, Yasuhiro Kato, Takehiko Muramatsu, Masatoshi Hodotsuka
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Publication number: 20120294785Abstract: An acidic gas absorbent having a high acidic gas absorption capacity, that is, a high acidic gas absorption amount and a high acidic gas absorption rate, an acidic gas absorption device, and a method for absorbing an acidic gas, are provided. An acidic gas absorbent containing an azabicyclo compound and a primary or secondary amine compound; an acidic gas absorbent containing a heteroaromatic ring compound and a primary or secondary amine compound; an acidic gas removal device using these acidic gas absorbents; and a method for removing an acidic gas are disclosed.Type: ApplicationFiled: March 29, 2010Publication date: November 22, 2012Applicant: Kabushiki Kaisha ToshibaInventors: Shinji Murai, Satoshi Saito, Yasuhiro Kato, Takehiko Muramatsu, Takashi Kuboki, Hiroko Watando, Asato Kondo, Yukishige Maezawa
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Publication number: 20120161071Abstract: An acid gas absorbent of which recovery amount of acid gas such as carbon dioxide is high, and an acid gas removal device and an acid gas removal method using the acid gas absorbent are provided. The acid gas absorbent of the embodiment comprising at least one type of tertiary amine compound represented by the following general formula (1). (In the above-stated formula (1), either one of the R1, R2 represents a substituted or non-substituted alkyl group of which carbon number is 2 to 5, and the other one represents a substituted or non-substituted alkyl group of which carbon number is 1 to 5. The R3 represents a methyl group or an ethyl group, and the R4 represents a hydroxyalkyl group. The R1, R2 may either be the same or different, and they may be coupled to form a cyclic structure.Type: ApplicationFiled: December 20, 2011Publication date: June 28, 2012Inventors: Shinji MURAI, Yukishige Maezawa, Yasuhiro Kato, Takehiko Muramatsu, Satoshi Saito, Hiroko Watando, Naomi Shida, Reiko Yoshimura, Takashi Kuboki
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Patent number: 7985704Abstract: A method of regenerating an absorbent includes preparing a reactor having a gas inlet portion and a discharge portion, filling the reactor with a reforming catalyst and an absorbent for absorbing carbon dioxide, feeding the feedstock gas and the steam via the gas inlet portion to the reactor to allow a steam reforming reaction to take place, allowing the absorbent to absorb carbon dioxide generated with hydrogen at the steam reforming reaction, and releasing the carbon dioxide from the absorbent after the carbon dioxide absorption capacity of the absorbent has been degraded. In this method, the temperature in an inside of the reactor is set to 625° C. or more at the release of the carbon dioxide, and an inert gas is fed via the discharge portion to the reactor.Type: GrantFiled: March 7, 2008Date of Patent: July 26, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Kenji Essaki, Takehiko Muramatsu, Masahiro Kato, Yasuhiro Kato
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Publication number: 20080227626Abstract: A method of regenerating an absorbent includes preparing a reactor having a gas inlet portion and a discharge portion, filling the reactor with a reforming catalyst and an absorbent for absorbing carbon dioxide, feeding the feedstock gas and the steam via the gas inlet portion to the reactor to allow a steam reforming reaction to take place, allowing the absorbent to absorb carbon dioxide generated with hydrogen at the steam reforming reaction, and releasing the carbon dioxide from the absorbent after the carbon dioxide absorption capacity of the absorbent has been degraded. In this method, the temperature in an inside of the reactor is set to 625° C. or more at the release of the carbon dioxide, and an inert gas is fed via the discharge portion to the reactor.Type: ApplicationFiled: March 7, 2008Publication date: September 18, 2008Inventors: Kenji Essaki, Takehiko Muramatsu, Masahiro Kato, Yasuhiro Kato
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Publication number: 20070224111Abstract: The invention provides a method for producing hydrogen which includes supplying a raw material gas and steam to a reactor filled with a reforming catalyst and a carbon dioxide gas absorbent containing a lithium composite oxide at a ratio of absorbent/catalyst by volume not lower than 9, and heating the inside of the reaction to a temperature range from 450° C. to 570° C., thereby carrying out reforming reaction.Type: ApplicationFiled: November 3, 2006Publication date: September 27, 2007Inventors: Kenji ESSAKI, Takehiko Muramatsu, Masahiro Kato, Yoshiyuki Isozaki
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Publication number: 20070092435Abstract: A method for manufacturing hydrogen includes supplying ethanol to a reactor which is filled with a reforming catalyst and a carbon dioxide absorbent containing a lithium composite oxide, and heating the reactor under the condition that the inside thereof is pressurized to 3 to 15 atm to carry out water-vapor reforming of the ethanol.Type: ApplicationFiled: November 15, 2006Publication date: April 26, 2007Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kenji ESSAKI, Masahiro Kato, Yukishige Maezawa, Takehiko Muramatsu
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Patent number: 6998050Abstract: The present invention provides a method of treating fats and oils containing low concentrations of aromatic halogen compounds and other contaminants by contacting the fats or oils with an adsorbing agent. The adsorbing agent contains a porous body and a non-protonic polar solvent held in the interiors of fine pores in the porous body to adsorb the contaminants. In one embodiment, the porous body also carries noble metal fine particles. In another embodiment, the adsorbing body comprises a solid acid for adsorbing the contaminants and there is a step of contacting the adsorbing body with an organic solvent to extract the adsorbed contaminants into the organic solvent.Type: GrantFiled: February 5, 2003Date of Patent: February 14, 2006Assignee: Kabushiki Kaisha ToshibaInventors: Katsuhiko Nakajoh, Takehiko Muramatsu, Yukishige Maezawa, Masao Kon, Tomohiro Todoroki, Katsushi Nishizawa, Atsushi Ohara
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Publication number: 20040178125Abstract: In a method of removing an aromatic halide from oil containing the aromatic halide, the aromatic halide compound being extracted from the oil containing the aromatic halide compound safely and highly efficiently, by extraction using an extracting solvent containing 1,3-dialkyl-2-imidazolidinone which is sulfur free and has extremely high extraction separation ability, or by using an extraction solvent containing an aqueous solution of 1,3-dialkyl-2-imidazolidinone. A system of removing aromatic halide compound from oil containing the aromatic halide compound includes a first supply source of a first extracting solvent containing 1,3-dialkyl-2-imidazolidinone; a second supply source of the oil containing the aromatic halide compound; and a first extractor which extracts the aromatic halide compound from the oil containing the aromatic halide compound supplied from the second supply source, by the first extracting-solvent supplied from the first supply source.Type: ApplicationFiled: December 23, 2003Publication date: September 16, 2004Inventors: Katsuhiko Nakajoh, Takehiko Muramatsu, Masao Kon, Hiroaki Kinoshita, Tomohiro Todoroki
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Publication number: 20030175401Abstract: The present invention provides a method of treating fats and oils containing low concentration aromatic halogen compounds which could remove the aromatic halogen compound contaminant efficiently from the oil and fats.Type: ApplicationFiled: February 5, 2003Publication date: September 18, 2003Applicant: Kabushiki Kaisha ToshibaInventors: Katsuhiko Nakajoh, Takehiko Muramatsu, Yukishige Maezawa, Masao Kon, Tomohiro Todoroki, Katsushi Nishizawa, Atsushi Ohara