Patents Assigned to Mitsubishi Jukogyo Kabushiki Kaisha
  • Patent number: 7655204
    Abstract: This invention relates to a technique for removing nitrogen oxides (NOx) present in exhaust gases discharged from boilers and the like. When the temperature of the exhaust gas is 100° C. or below, a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere so as to remove oxygen-containing functional groups present at the surfaces thereof and thereby reduce the atomic surface oxygen/surface carbon ratio to 0.05 or less is preferably used. When the temperature of the exhaust gas exceeds 100° C., a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere and activating the surfaces thereof with sulfuric acid or nitric acid to impart oxidizing oxygen-containing functional groups thereto is preferably used.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: February 2, 2010
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Isao Mochida, Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa
  • Patent number: 7465429
    Abstract: This invention relates to a technique for removing nitrogen oxides (NOx) present in exhaust gases discharged from boilers and the like. When the temperature of the exhaust gas is 100° C. or below, a heat-treated active carbon produced by heat-treating a raw active carbon at 600 to 1,200° C. in a non-oxidizing atmosphere so as to remove oxygen-containing functional groups present at the surfaces thereof and thereby reduce the atomic surface oxygen/surface carbon ratio to 0.05 or less is preferably used. When the temperature of the exhaust gas exceeds 100° C., a heat-treated active carbon produced by heat-treating a raw active carbon at 600. to 1,200° C. in a non-oxidizing atmosphere and activating the surfaces thereof with sulfuric acid or nitric acid to impart oxidizing oxygen-containing functional groups thereto is preferably used.
    Type: Grant
    Filed: February 25, 2002
    Date of Patent: December 16, 2008
    Assignees: Osaka Gas Company Limited, Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Isao Mochida, Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa
  • Patent number: 6896858
    Abstract: A gas refining method for adsorbing a reducing gas obtained by pressure gasification of coal or oil comprises introducing a reducing gas stream into an adsorbing and removing zone where it contacts an adsorbent. Sulfur-containing compounds are adsorbed onto the adsorbent and a first oxygen-containing gas stream is introduced into the adsorbing and removing zone in order to form a regeneration gas containing sulfur dioxide. The regeneration gas is contacted with a second oxygen-containing stream and a calcium-containing liquid slurry to effect absorption of sulfur dioxide by the slurry and precipitation of a gypsum compound. The temperature of the slurry is varied to cause selective precipitation of 60 -gypsum hemihydrate or gypsum dihydrate.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: May 24, 2005
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Atsushi Tatani, Makoto Susaki, Kazuaki Kimura, Taku Shimizu, Toshikuni Sera, Kenji Inoue
  • Publication number: 20040237405
    Abstract: A process of the gasification of glass fiber reinforced plastics includes feeding a glass fiber reinforced plastic material to a rotatable gasification furnace, heating the material to a temperature of 650 to 750° C. in the presence of oxygen and steam to gasify the plastic component thereof, recovering the remaining glass fibers; introducing the resulting plastic gas into a plastic gas decomposition section, partially oxidizing the plastic gas at a temperature of 700 to 1000° C. in the presence of additional oxygen or an additional mixture of oxygen and steam, and recovering the CO and H2 so produced.
    Type: Application
    Filed: July 1, 2004
    Publication date: December 2, 2004
    Applicant: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Yoshiyuki Takeuchi, Tadaaki Tamura, Masayasu Sakai, Takayuki Harada, Kunihisa Fujiwara, Ritsuo Hashimoto, Hirotoshi Horizoe
  • Patent number: 6814948
    Abstract: An active carbon for use in the treatment of exhaust gas can be obtained by heat-treating a starting active carbon fiber derived from polyacrylonitrile, pitch or the like or a starting particulate active carbon in a non-oxidizing atmosphere. The heat-treating temperature is preferably in the range of 600 to 1,200 ° C. for use in the desulfurization of exhaust gas, and in range of 600 to 1,000° C. for use in the denitration of exhaust gas. By using the resulting heat-treated active carbon for the purpose of desulfurization, the sulfur oxide concentration in exhaust gas can be reduced to 5 ppm or below. Moreover, by using the heat-treated active carbon in combination with conventional denitration based on selective catalytic reduction, the nitrogen oxide concentration in exhaust gas can be reduced to 1 ppm or below.
    Type: Grant
    Filed: August 21, 2000
    Date of Patent: November 9, 2004
    Assignees: Mitsubishi Jukogyo Kabushiki Kaisha, Osaka Gas Company Limited
    Inventors: Akinori Yasutake, Toshihiko Setoguchi, Norihisa Kobayashi, Takahiro Kasuh, Masaaki Yoshikawa, Isao Mochida
  • Patent number: 6773680
    Abstract: Five combustion exhaust gas treatment systems capable of removing dust and selenium (Se) in combustion exhaust gas and making harmless are proposed: (1) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se is transformed into insoluble compound, and Se is separated; (2) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se elution preventive agent is added, and dust is formed into scale; (3) dust in combustion exhaust gas is collected by dust collector, dust is formed into slurry by making use of part of circulation liquid in desulfurization apparatus, and tetravalent Se in dust slurry is transformed into insoluble compound, which is separated into solid and liquid; (4) dust is separated from combustion exhaust gas by dust collector, and it is heated to gasify Se, and is led into desulfurization apparatus, etc.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: August 10, 2004
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Taku Shimizu, Kazuaki Kimura, Kiyoshi Okazoe, Atsushi Tatani, Naohiko Ukawa, Masao Hino, Susumu Okino, Takashi Haruki, Toru Takashina, Eiji Ochi
  • Patent number: 6740297
    Abstract: Five combustion exhaust gas treatment systems capable of removing dust and selenium (Se) in combustion exhaust gas and making harmless are proposed: (1) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se is transformed into insoluble compound, and Se is separated; (2) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se elution preventive agent is added, and dust is formed into scale; (3) dust in combustion exhaust gas is collected by dust collector, dust is formed into slurry by making use of part of circulation liquid in desulfurization apparatus, and tetravalent Se in dust slurry is transformed into insoluble compound, which is separated into solid and liquid; (4) dust is separated from combustion exhaust gas by dust collector, and it is heated to gasify Se, and is led into desulfurization apparatus, etc.
    Type: Grant
    Filed: November 14, 2002
    Date of Patent: May 25, 2004
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Taku Shimizu, Kazuaki Kimura, Kiyoshi Okazoe, Atsushi Tatani, Naohiko Ukawa, Masao Hino, Susumu Okino, Takashi Haruki, Toru Takashina, Eiji Ochi
  • Patent number: 6689332
    Abstract: A process for removing CO2 from a combustion gas which comprises bringing a combustion gas containing oxygen and CO2 and a CO2 absorbent solution into contact at the atmospheric pressure, thereby allowing the CO2 absorbent solution to absorb CO2 from the combustion gas, and, in the ensuing step, heating the absorbent solution that has absorbed CO2 to liberate CO2 and regenerate the CO2 absorbent solution, and circulating the regenerated solution for reuse. An aqueous solution of a hindered amine selected from the group consisting of 2-amino-2-methyl-1-propanol (AMP), 2-(ethylamino)-ethanol (EAE), 2-(methylamino)-ethanol (MAE), and 2-(diethylamino)-ethanol (DEAE) is used as the CO2 absorbent solution, and carbon steel is used in building the members of the equipment that contact the aqueous hindered amine solution. The absorbent solution contains cupric carbonate which is a corrosion inhibitor.
    Type: Grant
    Filed: February 20, 1996
    Date of Patent: February 10, 2004
    Assignees: The Kansai Electric Power Co, Inc., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Kunihiko Yoshida, Tomio Mimura, Shigeru Shimojo, Mutsunori Karasaki, Masaki Iijima, Shigeaki Mitsuoka
  • Patent number: 6655941
    Abstract: In a central mechanism for a tire vulcanizer in accordance with the present invention, after a tire has been vulcanized (a bladder is expanded), a clamp rod is elevated to elevate a lower ring and separate it from a housing. After that, the clamp rod is turned so that a claw of a claw mechanism between the lower ring and the clamp rod can pass through. Then, a pin fixing a post to an upper ring is pulled out, and a bladder assembly is hung and carried out of the vulcanizer to replace the bladder and O-rings. After the bladder and other parts have been replaced, the bladder assembly is hung and mounted to the vulcanizer so that the hole for the claw mechanism of the lower ring is aligned with the upper end of the clamp rod. At this time, when the claw of the claw mechanism passes through, the lower ring is supported by the elevated clamp rod, and the lower ring and a supply/discharge opening of the housing is aligned with each other.
    Type: Grant
    Filed: November 17, 1999
    Date of Patent: December 2, 2003
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventor: Hideki Fukuda
  • Patent number: 6517792
    Abstract: Five combustion exhaust gas treatment systems capable of removing dust and selenium (Se) in combustion exhaust gas and making harmless are proposed: (1) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se is transformed into insoluble compound, and Se is separated; (2) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se elution preventive agent is added, and dust is formed into scale; (3) dust in combustion exhaust gas is collected by dust collector, dust is formed into slurry by making use of part of circulation liquid in desulfurization apparatus, and tetravalent Se in dust slurry is transformed into insoluble compound, which is separated into solid and liquid; (4) dust is separated from combustion exhaust gas by dust collector, and it is heated to gasify Se, and is led into desulfurization apparatus, etc.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: February 11, 2003
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Taku Shimizu, Kazuaki Kimura, Kiyoshi Okazoe, Atsushi Tatani, Naohiko Ukawa, Masao Hino, Susumu Okino, Takashi Haruki, Toru Takashina, Eiji Ochi
  • Patent number: 6511636
    Abstract: Five combustion exhaust gas treatment systems capable of removing dust and selenium (Se) in combustion exhaust gas and making harmless are proposed: (1) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se is transformed into insoluble compound, and Se is separated; (2) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se elution preventive agent is added, and dust is formed into scale; (3) dust in combustion exhaust gas is collected by dust collector, dust is formed into slurry by making use of part of circulation liquid in desulfurization apparatus, and tetravalent Se in dust slurry is transformed into insoluble compound, which is separated into solid and liquid; (4) dust is separated from combustion exhaust gas by dust collector, and it is heated to gasify Se, and is led into desulfurization apparatus, etc.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: January 28, 2003
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Taku Shimizu, Kazuaki Kimura, Kiyoshi Okazoe, Atsushi Tatani, Naohiko Ukawa, Masao Hino, Susumu Okino, Takashi Haruki, Toru Takashina, Eiji Ochi
  • Patent number: 6504068
    Abstract: A method of converting a plastic waste into oil by decomposing the plastic waste by a reaction using water in a supercritical or near supercritical region as a reaction medium. In this method, the reaction is conducted by using a tubular continuous reactor. The present invention further provides an apparatus therefor. Moreover, the present invention provides a method of converting a plastic waste into oil by conducting the reaction after hydrogen chloride is removed by performing the pyrolysis of the plastic waste in the case that the plastic waste contain chlorine. The present invention further provides an apparatus for performing this method.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: January 7, 2003
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Wataru Matsubara, Hiroshi Makihara, Kazuto Kobayashi, Masaki Iijima
  • 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
  • Patent number: 6373017
    Abstract: A continuous hot rolling mill with a metal block conveying apparatus and a metal block joining apparatus which moves with the metal blocks along the metal block conveying apparatus to conform a joining operation. The metal block conveying apparatus uses rollers supported by cylinders with a common hydraulic circuit which allows the cylinders to follow guide rails on the metal block joining apparatus and lower out of the path of the metal block joining apparatus and then return to a metal block support position after the metal block joining apparatus' passage without individual control circuits and valves for each of the cylinders.
    Type: Grant
    Filed: October 9, 1999
    Date of Patent: April 16, 2002
    Assignees: Kawasaki Steel Corporation, Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Shigeru Isoyama, Takeshi Hirabayashi, Hideyuki Nikaido, Hirosuke Yamada, Nozomu Tamura, Toshiaki Amagasa, Toshisada Takechi, Katsuhiro Takebayashi, Kanji Hayashi, Kunio Miyamoto, Akio Kuroda, Kazunori Nagai, Yoshiki Mito, Kazuo Morimoto, Kazuya Tsurusaki, Kiyoshi Izumi
  • Patent number: 6373966
    Abstract: A printing quality examining apparatus in which image data printing paper is successively taken in by a camera of a detection unit. The image data are compared with a previously taken-in reference data to detect a printing defect so that a decision as to whether printing quality is good or bad is made. The image data is averaged in time to calculate an estimated data, and the estimated data is compared with the previously taken-in reference data. When the estimated data is normal, pixels are determined to be normal. When the estimated data is unusual, the image data from the detection unit is compared with the reference data at next step so that when the image data from the detection is normal, the pixels are determined to be normal and when the image data is unusual, the pixels are determined to be defective and the paper is discharged.
    Type: Grant
    Filed: February 2, 2000
    Date of Patent: April 16, 2002
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Tomohiro Fujii, Norifumi Tasaka, Rieko Kitahara
  • Patent number: 6345756
    Abstract: The invention comprises a continuous hot rolling method in which a rear end portion of a preceding metal block and a fore end portion of a succeeding metal block are cut and the metal blocks are joined to each other by heating and pressing followed by a finish rolling. A region of each metal block is restrained from a clamping position to the end portion thereof in order to prevent a change in level of the metal blocks in heating and pressing the piece. The end portions of the metal blocks can be thus prevented from deformation.
    Type: Grant
    Filed: November 15, 1999
    Date of Patent: February 12, 2002
    Assignees: Kawasaki Steel Corporation, Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Shigeru Isoyama, Takeshi Hirabayashi, Hideyuki Nikaido, Hirosuke Yamada, Nozomu Tamura, Toshiaki Amagasa, Toshisada Takechi, Katsuhiro Takebayashi, Kanji Hayashi, Kunio Miyamoto, Akio Kuroda, Kazunori Nagai, Yoshiki Mito, Kazuo Morimoto, Kazuya Tsurusaki, Kiyoshi Izumi
  • Patent number: 6316138
    Abstract: An improved structure of a solid oxide electrolyte fuel cell (SOFC) is disclosed. A generating layer in the SOFC consists of three layers of a fuel electrode, an oxide layer and an oxygen electrode, and is shaped into a dimpled structure having recessed portions on its both surfaces. Protruded portions on the side of the fuel electrode are electrically bonded with an interconnector layer via a first conductive adhesive, while protruded portions on the side of the oxygen electrode of another generating layer are electrically bonded with the same interconnector layer via a second conductive adhesive. A plurality of generating layers and a plurality of interconnector layers are alternately stacked and they are electrically bonded in the above-described manner. Preferably the first conductive adhesive is made of material common to the fuel electrode and the second conductive adhesive is made of material common to the oxygen electrode.
    Type: Grant
    Filed: July 11, 1994
    Date of Patent: November 13, 2001
    Assignee: Mitsubishi, Jukogyo Kabushiki Kaisha
    Inventors: Tokuki Satake, Kiyoshi Watanabe, Fusayuki Nanjo, Koichi Takenobu, Hitoshi Miyamoto
  • Patent number: 6274108
    Abstract: A process is provided for removing carbon dioxide out of combustion exhaust gas by scrubbing the exhaust gas with an aqueous solution of monoethanolamine in a scrubber, and regenerating the carbon dioxide-loaded aqueous solution of monoethanolamine in a regenerator. The process is provided with means for replenishing the aqueous solution of monoethanolamine with a stock, aqueous solution containing from about 70% to about 75% by weight of monoethanolamine. By providing a stock, aqueous solution containing from about 70% to about 75% by weight of monoethanolamine, which is injected into the carbon dioxide-loaded aqueous solution of monoethanolamine being transferred from the scrubber to the regenerator, the entire carbon dioxide recovery system is free from flammables, rendering fire-fighting precautions unnecessary.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: August 14, 2001
    Assignees: The Kansai Electric Power Co., Ltd., Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Masumi Fujii, Yoshitsugu Hotta, Taiichiro Suda, Kenji Kobayashi, Kunihiko Yoshida, Shigeru Shimojo, Mutsunori Karasaki, Masaki Iijima, Toru Seto, Shigeaki Mitsuoka
  • Publication number: 20010009649
    Abstract: This invention relates to a gas refining system wherein sulfur compounds contained in a high-temperature and high-pressure reducing gas obtained by the pressure gasification of coal or heavy oil or the like are adsorbed and removed in the form of a sulfide by an adsorbent, the adsorbent having the sulfide formed thereon is regenerated by roasting it with an oxygen-containing gas, and the regeneration gas containing sulfur dioxide formed by the roasting reaction is introduced into a reactor (50) where, by use of gas blowing means, the regeneration gas and an oxygen-containing gas are blown into a calcium compound-containing slurry fed to the reactor (50), and thereby brought into gas-liquid contact with the slurry to effect the absorption of sulfur dioxide and the precipitation of gypsum within the reactor (50), characterized in that the gas refining system is provided with temperature control means for selectively controlling the temperature of the slurry within the reactor (50) so as to fall within at least
    Type: Application
    Filed: February 12, 2001
    Publication date: July 26, 2001
    Applicant: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Atsushi Tatani, Makoto Susaki, Kazuaki Kimura, Taku Shimizu, Toshikuni Sera, Kenji Inoue
  • Patent number: RE39041
    Abstract: An ammonia decomposition catalyst wherein a first catalyst having a crystalline silicate which is represented by the formula in terms of molar ratio of oxides as dehydrated: (1±0.8)R2O.[aM2O3.bM?O.cAl2O3].ySiO2, wherein R denotes an alkaline metal ion and/or hydrogen ion, M denotes a VIII Group element, rare earth element, titanium, vanadium, chromium, niobium, antimony or gallium, M? denotes magnesium, calcium, strontium or barium, a?0, 20>b?0, a+c=1, 3000>y>11 or a specific porous material as a carrier and iridium or a noble metal as an active metal is present together with or covered with a second catalyst having at least one element selected from the group consisting of titanium, vanadium, tungsten and molybdenum, if necessary, as well as a method of using the same.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: March 28, 2006
    Assignee: Mitsubishi Jukogyo Kabushiki Kaisha
    Inventors: Shigeru Nojima, Rie Tokuyama, Kouzo Iida