Patents Assigned to Mitsubishi Petrochemical Engineering Co. Ltd.
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Patent number: 5567346Abstract: 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: GrantFiled: December 7, 1994Date of Patent: October 22, 1996Assignees: Mitsubishi Chemical Corporation, Mitsubishi Petrochemical Engineering Co., Ltd.Inventors: Hiroyuki Kakiuchi, Masahiro Oka
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Patent number: 5518527Abstract: 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: GrantFiled: August 15, 1994Date of Patent: May 21, 1996Assignees: Mitsubishi PetroChemical Engineering Co., Ltd., Takeda Chemical Industries, Ltd.Inventors: Yasuhiro Tomizuka, Yoshihiro Saitou, Kiyoshi Itoga, Masanori Tsuji
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Patent number: 5453213Abstract: 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: GrantFiled: March 29, 1994Date of Patent: September 26, 1995Assignees: Mitsubishi Petrochemical Co., Ltd., Mitsubishi Petrochemical Engineering Co., Ltd.Inventors: Hiroyuki Kakiuchi, Masahiro Oka
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Patent number: 5087430Abstract: 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: GrantFiled: March 27, 1990Date of Patent: February 11, 1992Assignees: Mitsubishi Petrochemical Co., Ltd., Mitsubishi Petrochemical Engineering Co., Ltd., Chemicals Industries Co., Ltd.Inventors: Masayuki Hanada, Morio Fukuda, Takeo Koshikawa, Akihiro Yamauchi, Hiroshi Ogura
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Patent number: 4952381Abstract: 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: GrantFiled: December 12, 1988Date of Patent: August 28, 1990Assignees: 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
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Patent number: 4952545Abstract: 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: GrantFiled: June 12, 1989Date of Patent: August 28, 1990Assignees: 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
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Patent number: 4891348Abstract: 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: GrantFiled: July 24, 1987Date of Patent: January 2, 1990Assignees: 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
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Patent number: 4859439Abstract: 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: GrantFiled: September 30, 1987Date of Patent: August 22, 1989Assignees: 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
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Patent number: 4855115Abstract: 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: GrantFiled: July 29, 1987Date of Patent: August 8, 1989Assignees: 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
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Patent number: 4731017Abstract: 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: GrantFiled: March 9, 1987Date of Patent: March 15, 1988Assignee: Mitsubishi Petrochemical Engineering Co. Ltd.Inventors: Ryozo Echigo, Toshio Tomimura, Chikashi Nishino, Noboru Sue