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).

  • Publication number: 20200376428
    Abstract: Disclosed herein are acid gas absorbents that afford high acid gas (CO2) absorption amount per unit volume and high absorption speed and can prevent the absorbent. components from diffusing.
    Type: Application
    Filed: August 20, 2020
    Publication date: December 3, 2020
    Applicants: KABUSHIKI KASSHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Shinji MURAI, Yukishige MAEZAWA, Tetsuya KASEDA, Takehiko MURAMATSU, Satoshi SAITO, Mitsuru UDATSU, Daigo MURAOKA, Masatoshi HGDOTSUKA
  • Patent number: 10850227
    Abstract: Disclosed herein are acid gas absorbents that afford high acid gas (CO2) absorption amount per unit volume and high absorption speed and can prevent the absorbent components from diffusing. Also disclosed herein is a method and device for removing an acid gas, in which the energy required for separating the acid gas and regenerating the absorbent is reduced, are provided.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: December 1, 2020
    Assignees: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Shinji Murai, Yukishige Maezawa, Tetsuya Kaseda, Takehiko Muramatsu, Satoshi Saito, Mitsuru Udatsu, Daigo Muraoka, Masatoshi Hodotsuka
  • Publication number: 20190160422
    Abstract: Disclosed herein are acid gas absorbents that afford high acid gas (CO2) absorption amount per unit volume and high absorption speed and can prevent the absorbent components from diffusing. Also disclosed herein is a method and device for removing an acid gas, in which the energy required for separating the acid gas and regenerating the absorbent is reduced, are provided.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 30, 2019
    Applicants: KABUSHIKI KAISHA TOSHIBA, TOSHIBA ENERGY SYSTEMS & SOLUTIONS CORPORATION
    Inventors: Shinji Murai, Yukishige Maezawa, Tetsuya Kaseda, Takehiko Muramatsu, Satoshi Saito, Mitsuru Udatsu, Daigo Muraoka, Masatoshi Hodotsuka
  • Patent number: 10046269
    Abstract: There are provided an acidic gas absorbing agent that is large in recovery amount of an acidic gas. The acidic gas absorbing agent comprising an amine compound represented by general formula (1), and an acidic gas removing method and an acidic gas removing apparatus using the absorbing agent: wherein R1 represents a cycloalkyl group having 3 to 6 carbon atoms; R2 represents an alkyl group having 1 to 3 carbon atoms or a hydrogen atom; R3 and R4 each independently represent an alkyl group having 1 to 3 carbon atoms or a hydrogen atom; and R5 represents an alkyl group having 1 to 3 carbon atoms.
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: August 14, 2018
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji Murai, Yasuhiro Kato, Takehiko Muramatsu, Satoshi Saito, Daigo Muraoka, Yukishige Maezawa
  • Patent number: 9901862
    Abstract: 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: Grant
    Filed: May 8, 2014
    Date of Patent: February 27, 2018
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuhiro Kato, Shinji Murai, Takehiko Muramatsu, Satoshi Saito
  • Patent number: 9724642
    Abstract: An acid gas absorbent includes at least one kind of secondary amine compound represented by formula (1): where R1 is a cyclopentyl group or a cyclohexyl group which may be substituted by a substituted or non-substituted alkyl group having 1 to 3 carbon atoms, R2 and R3 each indicate an alkylene group having 2 to 4 carbon atoms, and R2 and R3 may each be the same or different, and be a straight chain or have a side chain.
    Type: Grant
    Filed: November 28, 2014
    Date of Patent: August 8, 2017
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji Murai, Yukishige Maezawa, Yasuhiro Kato, Takehiko Muramatsu, Masatoshi Hodotsuka, Satoshi Saito
  • Publication number: 20160296882
    Abstract: There are provided an acidic gas absorbing agent that is large in recovery amount of an acidic gas. The acidic gas absorbing agent comprising an amine compound represented by general formula (1), and an acidic gas removing method and an acidic gas removing apparatus using the absorbing agent: wherein R1 represents a cycloalkyl group having 3 to 6 carbon atoms; R2 represents an alkyl group having 1 to 3 carbon atoms or a hydrogen atom; R3 and R4 each independently represent an alkyl group having 1 to 3 carbon atoms or a hydrogen atom; and R5 represents an alkyl group having 1 to 3 carbon atoms.
    Type: Application
    Filed: April 4, 2016
    Publication date: October 13, 2016
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji MURAI, Yasuhiro KATO, Takehiko MURAMATSU, Satoshi SAITO, Daigo MURAOKA, Yukishige MAEZAWA
  • Patent number: 9446346
    Abstract: There is provided an acidic gas absorbing agent that is large in absorption amount and high in absorption rate of an acidic gas per unit volume and can prevent the diffusion of ingredients of the absorbing agent. The acidic gas absorbing agent includes an amino acid salt of formula 1 or formula 2 and an amine compound of formula 3. wherein COOMe represents a carboxylate group; Me represents an alkali metal. R1 and R2 represent an C1-4 alkylene chain; R3 represents a cycloalkyl group; R4 represents a hydrogen atom or an C1-4 alkyl group; and R5 represents a hydroxyalkyl group.
    Type: Grant
    Filed: November 10, 2015
    Date of Patent: September 20, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji Murai, Yasuhiro Kato, Takehiko Muramatsu, Satoshi Saito
  • Patent number: 9409119
    Abstract: 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: Grant
    Filed: December 20, 2011
    Date of Patent: August 9, 2016
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji Murai, Yukishige Maezawa, Yasuhiro Kato, Takehiko Muramatsu, Satoshi Saito, Hiroko Watando, Naomi Shida, Reiko Yoshimura, Takashi Kuboki
  • Publication number: 20160136568
    Abstract: There is provided an acidic gas absorbing agent that is large in absorption amount and high in absorption rate of an acidic gas per unit volume and can prevent the diffusion of ingredients of the absorbing agent. The acidic gas absorbing agent includes an amino acid salt of formula 1 or formula 2 and an amine compound of formula 3. wherein COOMe represents a carboxylate group; Me represents an alkali metal. R1 and R2 represent an C1-4 alkylene chain; R3 represents a cycloalkyl group; R4 represents a hydrogen atom or an C1-4 alkyl group; and R5 represents a hydroxyalkyl group.
    Type: Application
    Filed: November 10, 2015
    Publication date: May 19, 2016
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji MURAI, Yasuhiro KATO, Takehiko MURAMATSU, Satoshi SAITO
  • Patent number: 9181174
    Abstract: 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 for generating an enamine by adding a ketone to the tertiary amino alcohol aqueous solution, isolating the enamine from the tertiary amino alcohol aqueous solution, and isolating the tertiary amino alcohol from a residual liquid obtained by isolating the enamine.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: November 10, 2015
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji Murai, Takehiko Muramatsu, Daigo Muraoka, Satoshi Saito
  • Publication number: 20150246313
    Abstract: According to one embodiment, a CO2 recovery apparatus 10 includes: an absorption tower 11 in which a lean solution 22 is allowed to absorb CO2 in a discharge gas 21; a first heat exchange unit 12 in which a rich solution 23 is heated to from 50 to 100° C. to allow the rich solution 23 to have a mixed phase including two phases of a CO2-rich phase 31 and a CO2-lean phase 32; a phase separation unit 13 in which the rich solution 23 is separated into a CO2-rich phase 31 and a CO2-lean phase 32; and a regeneration tower 16 in which CO2 contained In a separated CO2-rich solution 46 including the CO2-rich phase 31 is separated to regenerate the rich solution 23.
    Type: Application
    Filed: December 8, 2014
    Publication date: September 3, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Takashi OGAWA, Shinji MURAI, Takehiko MURAMATSU, Satoshi SAITO
  • Publication number: 20150174530
    Abstract: An acid gas removal apparatus of one embodiment includes: an absorption tower bringing gas containing acid gas into contact with an acid gas absorbent of a solution containing a thermosensitive nitrogen-containing compound (formula (1)) and having LCST at a predetermined temperature to absorb the acid gas into the absorbent and remove the acid gas from the gas; a first heater heating the absorbent to LCST of the solution or more; a tank phase-separating the absorbent into a rich absorbent phase and a lean absorbent phase whose content of the thermosensitive compound is higher; a second heater heating the rich phase; a regeneration tower releasing the acid gas in the rich phase; a third heater provided at the regeneration tower heating the rich phase. (R1 is hydroxyalkyl group, R2 is non-substituted cyclic alkyl group whose carbon number is 3-10, R3 is hydrogen atom or non-substituted alkyl group.
    Type: Application
    Filed: December 16, 2014
    Publication date: June 25, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji Murai, Takehiko Muramatsu, Takashi Ogawa, Satoshi Saito
  • Publication number: 20150151246
    Abstract: An acid gas absorbent according to an embodiment includes at least one kind of secondary amine compound represented by the following general formula (1). In the above-described formula (1), R1 indicates a cyclopenthyl group or a cyclohexyl group in which a part of a hydrogen atom may be substituted by a substituted or non-substituted alkyl group having 1 to 3 carbon atoms, R2 and R3 each indicate an alkylene group having 2 to 4 carbon atoms, and, R2 and R3 may each be the same or different, and be a straight chain or have a side chain.
    Type: Application
    Filed: November 28, 2014
    Publication date: June 4, 2015
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Shinji MURAI, Yukishige MAEZAWA, Yasuhiro KATO, Takehiko MURAMATSU, Masatoshi HODOTSUKA, Satoshi SAITO
  • Publication number: 20150044114
    Abstract: An acid gas absorbent according to an embodiment includes at least one kind of amino acid salt represented by the following general formula (1). In the above-described formula (1), R1 indicates a cyclic alkyl group having 3 to 8 carbon atoms, R2 indicates a cyclic alkyl group having 3 to 8 carbon atoms, a chain alkyl group having 1 to 8 carbon atoms, or a hydrogen atom, R3 indicates a methylene group, an alkylene group having 2 to 4 carbon atoms, an alkylidene group having 2 to 4 carbon atoms, or a polymethylene group having 3 to 4 carbon atoms, and M indicates alkali metal.
    Type: Application
    Filed: August 4, 2014
    Publication date: February 12, 2015
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji MURAI, Yasuhiro KATO, Yukishige MAEZAWA, Takehiko MURAMATSU, Daigo MURAOKA, Satoshi SAITO
  • Publication number: 20140335003
    Abstract: 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: Application
    Filed: May 8, 2014
    Publication date: November 13, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yasuhiro KATO, Shinji MURAI, Takehiko MURAMATSU, Satoshi SAITO
  • Publication number: 20140296576
    Abstract: 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: Application
    Filed: March 19, 2014
    Publication date: October 2, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Shinji MURAI, Takehiko MURAMATSU, Daigo MURAOKA, Satoshi SAITO
  • Publication number: 20130343974
    Abstract: 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: Application
    Filed: June 20, 2013
    Publication date: December 26, 2013
    Inventors: Shinji MURAI, Yukishige MAEZAWA, Yasuhiro KATO, Takehiko MURAMATSU, Masatoshi HODOTSUKA, Satoshi SAITO
  • Patent number: 8545783
    Abstract: 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: Grant
    Filed: May 18, 2012
    Date of Patent: October 1, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinji Murai, Yukishige Maezawa, Yasuhiro Kato, Takehiko Muramatsu, Masatoshi Hodotsuka
  • Patent number: 8506913
    Abstract: 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: Grant
    Filed: March 29, 2010
    Date of Patent: August 13, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Shinji Murai, Satoshi Saito, Yasuhiro Kato, Takehiko Muramatsu, Takashi Kuboki, Hiroko Watando, Asato Kondo, Yukishige Maezawa