Patents Assigned to Mitsubishi Petrochemical Engineering Co. Ltd.
  • Patent number: 5567346
    Abstract: The present invention relates to a latent heat storage material composition comprising 65 to 85 wt % of sodium sulfate decahydrate, 1 to 20 wt % of ammonium chloride and 1 to 20 wt % of sodium bromide, and optionally 1 to 20 wt % of ammonium sulfate. The composition has a melting point of 5.degree. to 10.degree. C., has large latent heat at the melting point and exhibits excellent long-term performance.
    Type: Grant
    Filed: December 7, 1994
    Date of Patent: October 22, 1996
    Assignees: Mitsubishi Chemical Corporation, Mitsubishi Petrochemical Engineering Co., Ltd.
    Inventors: Hiroyuki Kakiuchi, Masahiro Oka
  • Patent number: 5518527
    Abstract: The present invention provides a method for economical recovery of ethylene from ethylene-containing vent gas from a plant for production of ethylene oxide, wherein ethylene is separated from saturated hydrocarbons such as methane, ethane and oxygen and then recovered efficiently. In this method, the vent gas is made to contact with molecular sieve carbon to selectively adsorb ethylene without substantial adsorption of the oxygen contained in the vent gas, the ethylene then being desorbed and recovered.
    Type: Grant
    Filed: August 15, 1994
    Date of Patent: May 21, 1996
    Assignees: Mitsubishi PetroChemical Engineering Co., Ltd., Takeda Chemical Industries, Ltd.
    Inventors: Yasuhiro Tomizuka, Yoshihiro Saitou, Kiyoshi Itoga, Masanori Tsuji
  • Patent number: 5453213
    Abstract: The present invention relates to a latent heat storage material composition comprising 70 to 90 wt % of sodium sulfate decahydrate, 3 to 17 wt % of ammonium chloride, 1 to 13 w % of sodium chloride and 1 to 13 wt % of ammonium sulfate. The composition can be frozen with cooled water of 4.degree. to 5.degree. C., has a melting point of 10.degree. to 13.degree. C., has large latent heat at the melting point and exhibits excellent long-term performance.
    Type: Grant
    Filed: March 29, 1994
    Date of Patent: September 26, 1995
    Assignees: Mitsubishi Petrochemical Co., Ltd., Mitsubishi Petrochemical Engineering Co., Ltd.
    Inventors: Hiroyuki Kakiuchi, Masahiro Oka
  • Patent number: 5087430
    Abstract: An exhaust gas containing a nitrogen oxides is passed at a temperature of 250.degree. to 550.degree. C. in the presence of a reducing agent through a catalyst bed filled with a molded denitration catalyst comprising at least the following three catalyst components(A) an oxide of at least one metallic element selected from the group consisting of Ti, Si and Zr,(B) an oxide of at least one metallic element selected from the group consisting of Mo and W, and(C) an oxide of Vsuch that the concentrations of the oxide (B) and/or the oxide (C) in the exhaust gas inlet site of the catalyst bed are higher than in the other site thereof.The molded denitration catalyst is also described.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: February 11, 1992
    Assignees: Mitsubishi Petrochemical Co., Ltd., Mitsubishi Petrochemical Engineering Co., Ltd., Chemicals Industries Co., Ltd.
    Inventors: Masayuki Hanada, Morio Fukuda, Takeo Koshikawa, Akihiro Yamauchi, Hiroshi Ogura
  • Patent number: 4952381
    Abstract: A catalyst for denitrizing nitrogen oxides contained in waste gas which contains a substantial amount of arsenic compounds therein, which comprises:(a) titanium, and(b) at least one element selected from the group consisting of arsenic and manganese. The catalyst is resistant to deactivation by arsenic compounds and retains high denitrizing activity over a long period of time. The catalyst may further contain at least one base metal selected from the group consisting of V, W, Mo, Cu, Fe, Cr, Co, Ni, Zn and Sn.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: August 28, 1990
    Assignees: Sakai Chemical Industry Co., Ltd., Mitsubishi Jukogyo Kabushiki Kaisha, Mitsubishi Petrochemical Co., Ltd., Mitsubishi Petrochemical Engineering Co., Ltd., Catalysts & Chemicals Industries Co., Ltd.
    Inventors: Horiaki Rikimaru, Tadao Nakatsuji, Toshikatsu Umaba, Kazuhiko Nagano, Kazuya Mishina, Hiromitsu Shimizu, Shigeru Nojima, Kozo Iida, Yoshiaki Obayashi, Touru Seto, Shigeaki Mitsuoka, Masayuki Hanada, Morio Fukuda, Kiyoshi Nagano, Makoto Imanari, Takeo Koshikawa, Akihiro Yamauchi
  • Patent number: 4952545
    Abstract: A process for removing nitrogen oxides from an exhaust gas containing the nitrogen oxides and an arsenic compound, which comprises bringing said exhaust gas into contact with a reducing gas in the presence of a catalyst to reduce the nitrogen oxides in the exhaust gas and render them nontoxic. There are disclosed two types of catalysts: (1) a catalyst comprising (A) an oxide of titanium, (B) an oxide of at least one metal selected from tungsten and molybdenum, (C) an oxide of vanadium, and (D) an oxide and/or a sulfate of at least one metal selected from the group consisting of yttrium, lanthanum, cerium and neodymium, and (2) the above (A), (B), (C) components and (D)' at least one metal selected from the group consisting of yttrium, lanthanum, cerium, neodymium, copper, cobalt, manganese and iron, the component (D)' being deposited on zeolite.
    Type: Grant
    Filed: June 12, 1989
    Date of Patent: August 28, 1990
    Assignees: Mitsubishi Petrochemical Co., Ltd., Mitsubishi Jukogyo Kabushiki Kaisha, Catalysts & Chemicals Industries Co., Ltd., Mitsubishi Petrochemical Engineering Co., Ltd.
    Inventors: Makoto Imanari, Takeo Koshikawa, Akihiro Yamauchi, Masayuki Hanada, Morio Fukuda, Kiyoshi Nagano
  • Patent number: 4891348
    Abstract: A catalyst for removing nitrogen oxides in an exhaust gas, said catalyst containing a first group of many pores having a diameter of 1.times.10.sup.2 .ANG. to less than 1.times.10.sup.3 .ANG. and a second group of many pores having a diameter of 1.times.10.sup.3 .ANG. to 1.2.times.10.sup.5 .ANG., the pore volume of the first group being at least 10% based on the total pore volume of the first group and the second group, and said catalyst comprising titanium and at least one metal selected from molybdenum, tungsten and vanadium as metal elements of catalytically active ingredients.
    Type: Grant
    Filed: July 24, 1987
    Date of Patent: January 2, 1990
    Assignees: Mitsubishi Petrochemical Co., Ltd., Mitsubishi Jukogyo Kabushiki Kaisha, Sakai Chemical Industry Co., Ltd., Catalysts & Chemicals Industries, Co., Ltd., Mitsubishi Petrochemical Engineering Co., Ltd.
    Inventors: Makoto Imanari, Takeo Koshikawa, Akihiro Yamauchi, Masayuki Hanada, Morio Fukuda, Kiyoshi Nagano
  • Patent number: 4859439
    Abstract: A catalyst for denitrizing nitrogen oxides contained in waste gases, which comprises:(a) titanium, and(b) at least one base metal selected from the group consisting of V, W, Mo, Mn, Cu, Fe, Cr, Co, Ni, Zn and Sn, the catalyst containing titanium and the base metals in amounts of at least about 50% by weight in terms of oxides based on the catalyst, and titanium in amounts of about 80-99% by weight in terms of oxides and the base metals in amounts of about 20-1% by weight in terms of oxides, respectively, based on the total weight in terms of oxides of titanium and the base metals, and the catalyst having micropores of about 50-75000 .ANG. in radius in amounts of about 0.25-0.45 ml/g, and micropores of about 50-100 .ANG. in radius in amounts of about 10-40% by volume and micropores of about 500-60000 .ANG. in radius in amounts of not less than about 10% by volume, respectively, based on the total volume of the micropores of about 50-75000 .ANG.
    Type: Grant
    Filed: September 30, 1987
    Date of Patent: August 22, 1989
    Assignees: Sakai Chemical Industry Co., Ltd., Mitsubishi Jukogyo Kabushiki Kaisha, Mitsubishi Petrochemical Co., Ltd., Mitsubishi Petrochemical Engineering Co., Ltd., Catalysts & Chemicals Industries Co., Ltd.
    Inventors: Hiroaki Rikimaru, Tadao Nakatsuji, Toshikatsu Umaba, Kuzuhiko Nagano, Kazuya Mishina, Hiromitsu Shimizu
  • Patent number: 4855115
    Abstract: A process for removing nitrogen oxides from an exhaust gas containing the nitrogen oxides and an arsenic compound, which comprises bringing said exhaust gas into contact with a reducing gas in the presence of a catalyst to reduce the nitrogen oxides in the exhaust gas and render them nontoxic. There are disclosed two types of catalysts: (1) a catalyst comprising (A) an oxide of titanium, (B) an oxide of at least one metal selected from tungsten and molybdenum, (C) an oxide of vanadium, and (D) an oxide and/or a sulfate of at least one metal selected from the group consisting of yttrium, lanthanum, cerium and neodymium, and (2) the above (A), (B), (C) components and (D)' at least one metal selected from the group consisting of yttrium, lanthanum, cerium, neodymium, copper, cobalt, manganese and iron, the component (D)' being deposited on zeolite.
    Type: Grant
    Filed: July 29, 1987
    Date of Patent: August 8, 1989
    Assignees: Mitsubishi Petrochemical Co. Ltd., Mitsubishi Jukogyo Kabushiki Kaisha, Catalysts & Chemicals Industries, Co., Ltd., Mitsubishi Petrochemical Engineering Co., Ltd.
    Inventors: Makoto Imanari, Takeo Koshikawa, Akihiro Yamauchi, Masayuki Hanada, Morio Fukuda, Kiyoshi Nagano
  • Patent number: 4731017
    Abstract: A radiation heating apparatus comprising a heating zone, a zone to be heated, a gas non-permeable boundary member defining the boundary between the two zones, and a porous radiator member provided in the heating zone, wherein a high-temperature gas is formed in, or introduced into, the heating zone and discharged at least through the porous radiator member, and the zone to be heated is heated through the gas non-permeable boundary member.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: March 15, 1988
    Assignee: Mitsubishi Petrochemical Engineering Co. Ltd.
    Inventors: Ryozo Echigo, Toshio Tomimura, Chikashi Nishino, Noboru Sue