Patents by Inventor Tomio Mimura

Tomio Mimura 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: 20030045756
    Abstract: In a decarbonation process for removing carbon dioxide from a carbon dioxide-containing gas with the use of an amine compound-containing absorbing solution, an amine compound accompanying a decarbonated exhaust gas is efficiently recovered in the following manner: A water washing section is constituted in two stages, a first-stage water washing section 64 and a second-stage water washing section 65. In these water washing sections, recovery of the amine compound accompanying the decarbonated exhaust gas is performed sequentially. Regeneration tower refluxed water is supplied as washing water to the second-stage water washing section 65. Washing water is withdrawn from the second-stage water washing section 65 and supplied to the first-stage water washing section 64. Demisters 83, 84 and 85 are provided at outlets of a carbon dioxide absorption section 73, the first-stage water washing section 64 and the second-stage water washing section 65.
    Type: Application
    Filed: August 13, 2002
    Publication date: March 6, 2003
    Applicant: The Kansai Electric Power Co., Osaka-Shi, Japan Mitsubishi Heavy Industries, LTD., Tokyo, Japan
    Inventors: Tomio Mimura, Takashi Nojo, Kazuo Ishida, Hiroshi Nakashoji, Hiroshi Tanaka, Takuya Hirata
  • Patent number: 6500397
    Abstract: There are disclosed a method for removing CO2 from a combustion exhaust gas which comprises the step of bringing the combustion exhaust gas under atmospheric pressure into contact with an aqueous solution of a hindered amine selected from the group consisting of 2-amino-2-methyl-1-propanol, 2-methylaminoethanol, 2-ethylamino-ethanol and 2-piperidineethanol; and another method for removing carbon dioxide from a combustion exhaust gas which comprises the step of bringing the combustion exhaust gas under atmospheric pressure into contact with a mixed aqueous solution of 100 parts by weight of an amine compound (X) selected from the group consisting of 2-amino-2-methyl-1, 3-propanediol, 2-amino-2-methyl-1-propanol, 2-amino-2-ethyl-1, 3-propanediol, t-butyldiethanolamine and 2-amino-2-hydroxymethyl-1,3-propanediol; and 1-25 parts by weight of an amine compound (Y) selected from the group consisting of piperazine, piperidine, morpholine, glycine, 2-methylamino-ethanol, 2-piperidineethanol and 2-ethylaminoethanol.
    Type: Grant
    Filed: November 6, 1998
    Date of Patent: December 31, 2002
    Assignees: The Kansai Electrical Power Co., Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Kunihiko Yoshida, Tomio Mimura, Shigeru Shimojo, Mutsunori Karasaki, Masaki Iijima, Touru Seto, Shigeaki Mitsuoka
  • Publication number: 20020178925
    Abstract: The gas-liquid contact plate is constructed so that a plurality of straight rows are provided; irregularities are formed over both surfaces of the plate at equal intervals in the row; the adjacent rows have repeated irregularities opposite to each other; and in a peak or valley portion of the irregularities, there is formed an opening connecting the surface to the back surface between the adjacent rows. There is provided a gas-liquid contact plate that has high wettability, being capable of improving the gas-liquid contact efficiency, and is light in weight and advantageous in terms of manufacturing cost.
    Type: Application
    Filed: January 2, 2002
    Publication date: December 5, 2002
    Applicant: The Kansai Electric Power Co., Inc.
    Inventors: Tomio Mimura, Takashi Nojo, Naoyuki Yoshizumi, Hiroshi Ohira, Ryuji Yoshiyama, Kenji Iwasaki
  • Patent number: 6117404
    Abstract: The present invention provides a process for recovering a basic amine compound which comprises the steps of (a) supplying a CO.sub.2 -containing gas to a carbon dioxide absorption unit in which an absorbing solution, which contains a basic amine compound, absorbs carbon dioxide; (b) bringing the gas, from which carbon dioxide has been removed, into vapor-liquid contact with a washing water at a temperature from 20 to 60.degree. C. in an amine recovering unit of a carbon dioxide removal tower, recovering part of the basic amine compound accompanying the gas into the water phase and discharging the gas as an exhaust gas of the carbon dioxide removal tower; and (c) collecting the basic amine compound which remains in the exhaust gas of the carbon dioxide removal tower by passing the exhaust gas pass through a demister at a temperature from 20 to 60.degree. C. The basic amine compound can be recovered efficiently from the gas of the carbon dioxide removal tower by using the above process.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: September 12, 2000
    Assignees: The Kansai Electric Power, Co., Inc., Mitsubishi Heavy Industries, Ltd.
    Inventors: Tomio Mimura, Hidenobu Shimayoshi, Shigeaki Mitsuoka, Hiroshi Tanaka, Masaki Iijima
  • Patent number: 6051161
    Abstract: This invention provides a method for the removal of carbon dioxide present in gases which comprises bringing a CO.sub.2 -containing gas into contact with an aqueous solution containing at least one amine compound of the general formula ##STR1## wherein R.sup.1 to R.sup.8 may be the same or different and each represent a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, and m is 0 or 1. The method of the present invention makes it possible to remove carbon dioxide efficiently. In particular, since carbon dioxide can be easily desorbed by heating the aqueous solution having absorbed carbon dioxide, the thermal energy required for regeneration of the aqueous solution can be reduced.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: April 18, 2000
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Heavy Industries, Ltd.
    Inventors: Hitomi Suzuki, Tomio Mimura, Toru Iwaki, Shigeaki Mitsuoka, Hiroshi Tanaka, Masaki Iijima
  • Patent number: 6036931
    Abstract: There are disclosed a method for removing CO.sub.2 from a combustion exhaust gas which comprises the step of bringing the combustion exhaust gas under atmospheric pressure into contact with an aqueous solution of a hindered amine selected from the group consisting of 2-amino-2-methyl-1-propanol, 2-methylaminoethanol, 2-ethylaminoethanol and 2-piperidineethanol; and another method for removing carbon dioxide from a combustion exhaust gas which comprises the step of bringing the combustion exhaust gas under atmospheric pressure into contact with a mixed aqueous solution of 100 parts by weight of an amine compound (X) selected from the group consisting of 2-amino-2-methyl-1,3-propanediol, 2-amino-2-methyl-1-propanol, 2-amino-2-ethyl-1,3-propanediol, t-butyldiethanolamine and 2-amino-2-hydroxymethyl-1,3-propanediol; and 1-25 parts by weight of an amine compound (Y) selected from the group consisting of piperazine, piperidine, morpholine, glycine, 2-methylaminoethanol, 2-piperidineethanol and 2-ethylaminoethanol.
    Type: Grant
    Filed: June 3, 1997
    Date of Patent: March 14, 2000
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Kunihiko Yoshida, Tomio Mimura, Shigeru Shimojo, Mutsunori Karasaki, Masaki Iijima, Touru Seto, Shigeaki Mitsuoka
  • Patent number: 5904908
    Abstract: This invention provides a method for the removal of carbon dioxide present in gases which comprises bringing a CO.sub.2 -containing gas into contact with an aqueous solution containing at least one amine compound of the general formula ?1! ##STR1## wherein R.sup.1 to R.sup.8 may be the same or different and each represent a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, and m is 0 or 1. The method of the present invention makes it possible to remove carbon dioxide efficiently. In particular, since carbon dioxide can be easily desorbed by heating the aqueous solution having absorbed carbon dioxide, the thermal energy required for regeneration of the aqueous solution can be reduced.
    Type: Grant
    Filed: March 13, 1997
    Date of Patent: May 18, 1999
    Assignees: Mitsubishi Heavy Industries, Ltd., The Kansai Electric Power Co., Inc.
    Inventors: Hitomi Suzuki, Tomio Mimura, Toru Iwaki, Shigeaki Mitsuoka, Hiroshi Tanaka, Masaki Iijima
  • Patent number: 5750083
    Abstract: This invention relates to methods for the removal of hydrogen sulfide from various gases containing hydrogen sulfide. In order to remove hydrogen sulfide, an aqueous solution containing a di(lower alkyl)amino-(lower alkanol) or triethylenediamine is used. In order to remove hydrogen sulfide selectively from gases containing carbon dioxide and hydrogen sulfide, an aqueous solution containing tert-butyldiethanolamine, triisopropanolamine, triethylenediamine or 2-dimethylamino-2-methyl-1-propanol is used. In order to remove both carbon dioxide and hydrogen sulfide from gases containing carbon dioxide and hydrogen sulfide, an aqueous solution containing a mono(lower alkyl)amino-(lower alkanol) is used.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: May 12, 1998
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Tomio Mimura, Shigeru Shimojo, Masaki Iijima, Shigeaki Mitsuoka
  • Patent number: 5744110
    Abstract: This invention provides a method for the removal of CO.sub.2 present in combustion exhaust gas which comprises bringing combustion exhaust gas at atmospheric pressure into contact with a mixed aqueous solution containing 100 parts by weight of an amino acid metal salt (X), 1 to 25 parts by weight of piperazine (Y), and optionally a copper compound in such an amount as to give a divalent copper ion concentration of 10 to 1,000 ppm based on the mixed aqueous solution, the amino acid metal salt being of the general formulaCH.sub.3 NR.sup.1 CHR.sup.2 COOM (1)wherein R.sup.1 and R.sup.2 represent hydrogen atoms or lower alkyl groups, provided that R.sup.2 is a lower alkyl group when R.sup.1 is a hydrogen atom, and R.sup.2 is a hydrogen atom when R.sup.1 is a lower alkyl group, and M represents an alkali metal.Potassium dimethylaminoacetate is a preferred amino acid metal salt (X).
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: April 28, 1998
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Tomio Mimura, Shigeru Shimojo, Masaki Iijima, Shigeaki Mitsuoka
  • Patent number: 5700437
    Abstract: A method for removing carbon dioxide from a combustion exhaust gas under atmospheric pressure by the use of a mixed solution of a specific amine compound X having an alcoholic hydroxyl group and a primary amino group which is bonded to a tertiary carbon atom having two unsubstituted alkyl groups and another amine compound Y being a diaminotoluene (DAT) selected from the group consisting of 2,3-DAT, 2,4-DAT, 2,5-DAT, 2,6-DAT, 3,4-DAT and 3,5-DAT.
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: December 23, 1997
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Masumi Fujii, Taiichiro Suda, Yoshitsugu Hotta, Koichi Kitamura, Yukihiro Jinno, Tomio Mimura, Shigeru Shimojo, Masaki Iijima, Shigeaki Mitsuoka
  • Patent number: 5648053
    Abstract: A process for removing both CO.sub.2 and NO.sub.x from combustion gases consists, first, in cooling a combustion gas to 50 to 100.degree. C. and adding ozone to oxidize NO in the combustion gas to NO.sub.2. Then in a CO.sub.2 removal step, the gas is brought into contact with an aqueous solution of an alcoholic hydroxyl-containing secondary- or tertiary-amine to remove NO.sub.2 together with CO.sub.2 from the gas.
    Type: Grant
    Filed: October 4, 1995
    Date of Patent: July 15, 1997
    Assignees: The Kansai Electric Power Co. Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Tomio Mimura, Shigeru Shimojo, Masaki Iijima, Shigeaki Mitsuoka
  • Patent number: 5618506
    Abstract: This invention relates to the process for removing CO.sub.2 from CO.sub.2 -containing gas such as combustion gas. For example, it is the process for removing CO.sub.2 from combustion gas through the contact of the gas at the atmospheric pressure with an aqueous solution of an amine represented by the general formula R.sup.1 NHC(CH.sub.3).sub.2 CH.sub.2 OH in which R.sup.1 is a lower alkyl group having 1-4 carbon atoms, or an aqueous solution containing both an amine represented by the general formula R.sub.2 CHR.sub.3 NHCH.sub.2 CH.sub.2 OH in which R.sup.2 is a hydrogen atom or a lower alkyl group having 1-4 carbon atoms and R.sup.3 is a hydrogen atom or methyl group and a piperazine compound selected from the group consisting of piperazine, 2-methylpiperazine, 2,3-dimethylpiperazine, and 2,5-dimethylpiperazine, or an mixed aqueous amine solution containing a secondary amine and a tertiary amine at concentrations of 10-45% by weight each, or an aqueous solution of a piperazine derivative.
    Type: Grant
    Filed: August 4, 1995
    Date of Patent: April 8, 1997
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Hitomi Suzuki, Atsushi Hayakawa, Tomio Mimura, Shigeru Shimojo, Hidenobu Shimayoshi, Masaki Iijima, Shigeaki Mitsuoka, Toru Iwaki
  • Patent number: 5609840
    Abstract: This invention relates to methods for the removal of hydrogen sulfide from various gases containing hydrogen sulfide. In order to remove hydrogen sulfide, an aqueous solution containing a di(lower alkyl)amino-(lower alkanol) or triethylenediamine is used. In order to remove hydrogen sulfide selectively from gases containing carbon dioxide and hydrogen sulfide, an aqueous solution containing tert-butyldiethanolamine, triisopropanolamine, triethylenediamine or 2-dimethylamino-2-methyl-1-propanol is used. In order to remove both carbon dioxide and hydrogen sulfide from gases containing carbon dioxide and hydrogen sulfide, an aqueous solution containing a mono(lower alkyl)amino-(lower alkanol) is used.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: March 11, 1997
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Tomio Mimura, Shigeru Shimojo, Masaki Iijima, Shigeaki Mitsuoka
  • Patent number: 5603377
    Abstract: A heat pipe includes: a pipe barrel; and a large number of fins disposed on the peripheral surface of the pipe barrel at least on either a heat collecting section side or a radiating section side, each of the fins is attached to the pipe barrel on a plane perpendicular to the axis of the pipe barrel, and each of the fins is composed of a metal plate and net-like material adhered to both surfaces of the metal plate.A heat exchanger of gas-liquid contacting plate type includes: a plurality of heat transfer plates, disposed vertically at certain intervals, defining air flow passages therebetween which allow air to rise, and each of the plates has a heat medium flowing passage thereinside for allowing a heat medium to flow therethrough while the side surfaces of each of the heat transfer plates, which define the air flow passages, are adhered with nets for allowing a liquid to flow downward along the nets and plates.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: February 18, 1997
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Masumi Fujii, Taiichiro Suda, Yoshitsugu Hotta, Koichi Kitamura, Yukihiro Jinno, Tomio Mimura, Shigeru Shimojo, Masaki Iijima, Shigeaki Mitsuoka
  • Patent number: 5603908
    Abstract: A process for removing CO.sub.2 from a combustion gas which comprises removing CO.sub.2 from the combustion gas through contact of an aqueous hindered amine solution used as a CO.sub.2 absorbent solution with the combustion gas at atmospheric pressure and then, in a regeneration column, liberating CO.sub.2 from the absorbent solution that has absorbed CO.sub.2 by heating it and thereby regenerating the absorbent solution. The process further comprises a partial absorbent solution regeneration step in at least one stage wherein the absorbent solution that has absorbed CO.sub.2 is heated through heat exchange with a high-temperature regenerated absorbent solution and part of the CO.sub.2 that is liberated is separated from the absorbent solution. Following this, according to the necessity, part of the partially regenerated absorbent solution thus obtained is returned to the step of removing CO.sub.2 from the combustion gas for use as part of the CO.sub.
    Type: Grant
    Filed: May 22, 1996
    Date of Patent: February 18, 1997
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Kunihiko Yoshida, Tomio Mimura, Shigeru Shimojo, Mutsunori Karasaki, Masaki Iijima, Touru Seto, Shigeaki Mitsuoka
  • Patent number: 5536454
    Abstract: An apparatus for gas-liquid contact in which tubular structure fillers having a cross section of any of various shapes and having straight tubular portions are arranged in a substantially vertical direction in the form of plural steps so that the gas-liquid contact surfaces of the fillers may be parallel with the flow of the gas,the apparatus for gas-liquid contact being characterized in that the gas-liquid contact surfaces comprise rough surface portions, porous surface portions, meshes or plates to which meshes adhere, or there is interposed, between the plural steps of the fillers, a dispersing plate for receiving the liquid downward coming from the site above the fillers, dispersing the liquid, and allowing the liquid to downward flow.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 16, 1996
    Assignees: Mitsubishi Jukogyo Kabushiki Kaisha, Kansai Electric Power Co., Inc.
    Inventors: Masumi Fujii, Yoshitsugu Hotta, Taiichiro Suda, Kouichi Kitamura, Yukihiro Jinno, Tomio Mimura, Shigeru Shimojo, Masami Kawasaki, Kunihiko Yoshida, Mutsunori Karasaki, Masaki Iijima, Shigeaki Mitsuoka