Patents Assigned to Mitsubishi Chemical Industries Ltd.
  • Method for producing acrylamide polymers
    Patent number: 4154910
    Abstract: Concentrated aqueous solution of acrylamide or mixture of acrylamide and other vinyl monomer is polymerized in the presence of catalyst, and the polymerization solution is to be boiled by heat of polymerization in the course of polymerization.Obtained hydrous gels of acrylamide polymers are porous, water soluble and are easily dehydrated by conventional dehydration techniques.
    Type: Grant
    Filed: May 10, 1977
    Date of Patent: May 15, 1979
    Assignees: Kyoritsu Yuki Co., Ltd., Mitsubishi Chemical Industries, Ltd.
    Inventors: Katsutoshi Tanaka, Kazuo Ikeda
  • N.sup.2 -Naphthalenesulfonyl-L-arginine derivatives, and the pharmaceutically acceptable acid addition salts thereof
    Patent number: 4154828
    Abstract: N.sup.2 -naphthalenesulfonyl-L-argininamides and the pharmaceutically acceptable salts thereof have been found to be effective as pharmaceutical agents for the inhibition and suppression of thrombosis.
    Type: Grant
    Filed: October 21, 1977
    Date of Patent: May 15, 1979
    Assignees: Mitsubishi Chemical Industries, Ltd., Shosuke 0KAMOTO
    Inventors: Shosuke Okamoto, Ryoji Kikumoto, Yoshikuno Tamao, Kazuo Ohkubo, Shinji Tonomura
  • Method of recovering butadiene gas from an acetoxylation process
    Patent number: 4152525
    Abstract: Disclosed is a method of recovering butadiene gas from an acetoxylation process which method comprises steps: (a) contacting a butadiene-containing gas with acetic acid to effect the absorption of butadiene in acetic acid, (b) recycling the acetic acid containing butadiene to the acetoxylation process, (c) contacting the waste gas containing acetic acid from step (a) with water to effect the absorption of acetic acid in water and (d) recycling the water containing acetic acid to hydrolysis step of the acetoxylation product.
    Type: Grant
    Filed: January 30, 1975
    Date of Patent: May 1, 1979
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Yasuo Tanabe, Jun Toriya, Ikuo Kasahara
  • Process for preparing polyolefin
    Patent number: 4151337
    Abstract: Polyolefin is prepared by polymerizing an olefin by using a catalyst system combining an auxiliary catalytic component of an organoaluminum compound and a solid catalytic component obtained by reacting a mixture of a vanadium trichloride ether complex and a titanium trichloride ether complex with an aluminum halide and/or a boron halide.
    Type: Grant
    Filed: May 25, 1977
    Date of Patent: April 24, 1979
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Natsuki Kanoh, Toru Tanaka, Nobuo Enokido
  • Process for producing 1,4-glycol diester
    Patent number: 4150239
    Abstract: A process for producing 1,4-glycol diester from unsaturated glycol diesters prepared by reacting butadiene, acetic acid and oxygen or an oxygen-containing gas in the presence of a palladium catalyst or, from saturated glycol diesters prepared by hydrogenating said unsaturated glycol diesters, wherein, 1,4-glycol diester is separated from the isomer mixture of glycol diesters prepared, the residual glycol diester isomers are decomposed by heating and butadiene and/or acetic acid produced on decomposition are recycled to the process for the production of glycol diesters.
    Type: Grant
    Filed: May 27, 1977
    Date of Patent: April 17, 1979
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Yasuo Tanabe, Jun Toriya
  • Process for preparing heteropoly-acids
    Patent number: 4146574
    Abstract: Heteropoly-acids suitable for use as a component of a variety of oxidation catalysts are prepared by hydrothermally reacting an aqueous slurry which contains an oxide and/or oxyacid each of molybdenum, vanadium and phosphorus and which may optionally contain an oxide and/or oxyacid of tungsten.
    Type: Grant
    Filed: May 17, 1977
    Date of Patent: March 27, 1979
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Takeru Onoda, Masayuki Otake
  • Dust collecting system for coke oven
    Patent number: 4146435
    Abstract: An improved dust collecting system for a coke oven employs a bag filter dust collector as a common dust collector for both the coke discharge operation and the coal charging operation. First, the dust spouted out in the coke discharge operation and then successively and alternatingly, the dust spouted out in the coal charging operation and in the coke discharge operation are collected, whereby fine coal particles deposited out in the coal charging step are deposited on the layer of the fine coke particles firstly deposited out in the coke discharging operation. In addition, a combustion chamber is provided for burning the gases and dusts spouted off in the coal charging operation and a pre-dust wet-type collector is utilized therein for preliminary filtering before the same is fed to the common bag filter dust collector.
    Type: Grant
    Filed: April 18, 1977
    Date of Patent: March 27, 1979
    Assignees: Mitsubishi Chemical Industries, Ltd., Kansai Netsukagaku Kabushiki Kaisha
    Inventors: Hajime Ueno, Kentaro Kakumura, Nobukastu Sasaki, Yorito Sato
  • Method of producing partially hydrolyzed acrylamide polymers
    Patent number: 4146690
    Abstract: Acrylamide polymers or copolymers are partially hydrolyzed by mixing the particles of hydrous gel of the polymer in an apparatus which has a mixing mechanism comprising of blades having a blank space and the face of the apparatus where the polymer is contacted with is made of or coated with synthetic resin.
    Type: Grant
    Filed: June 29, 1977
    Date of Patent: March 27, 1979
    Assignees: Mitsubishi Chemical Industries, Ltd., Kyoritsu Yuki Co., Ltd.
    Inventors: Atsuo Tago, Hiroyuki Kudomi, Yasuyuki Nakanishi
  • Smoke-retardant polyisocyanurate foam
    Patent number: 4133781
    Abstract: A smoke-retardant polyisocyanurate foam which contains an organosilicate having hydroxypolyoxyalkylene group which is obtained by reacting a polyoxyalkyleneglycol with at least one of metallic silicon, halosilicon compounds and lower alkyl silicates.
    Type: Grant
    Filed: August 24, 1977
    Date of Patent: January 9, 1979
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Kaneyoshi Ashida, Masaaki Ohtani, Takashi Yokoyama, Shoichi Ohkubo
  • N.sup.2 -Substituted-L-arginine derivatives and the pharmaceutically acceptable acid addition salts thereof
    Patent number: 4133880
    Abstract: N.sup.2 -substituted-L-arginine esters and amides, and the pharmaceutically acceptable acid addition salts thereof have been found to be effective as pharmaceutical agents for the inhibition and suppression of thrombosis.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: January 9, 1979
    Assignees: Mitsubishi Chemical Industries Ltd., Shosuke Okamoto
    Inventors: Shosuke Okamoto, Akiko Hijikata, Ryoji Kikumoto, Yoshikuni Tamao, Kazuo Ohkubo, Tohru Tezuka, Shinji Tonomura
  • Method of removing nitrogen oxides in exhaust combustion gases
    Patent number: 4129651
    Abstract: In a method of removing nitrogen oxides non-catalytically from an exhaust combustion gas by maintaining said combustion gas at a temperature of from 700.degree. to 1300.degree. C in the presence of oxygen and an ammonia source in a combustion apparatus which has heat exchange surfaces in a zone downstream of the position where the ammonia source is added, the improvement which comprises feeding said ammonia source to the exhaust combustion gas at a position where the heat exchange surface area in the space downstream of the position of ammonia source addition which has a combustion gas residence time of up to 1 second is less than 0.5 .times. 10.sup.-2 m.sup.2 per 1 Nm.sup.3 /H of said combustion gas flow; and the temperature of said combustion gas at the outlet of said space is above 700.degree. C.
    Type: Grant
    Filed: November 8, 1976
    Date of Patent: December 12, 1978
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Sakae Koike, Shoichi Matsunami, Yasuo Fujiwara
  • Molded gypsum product and process for preparing the same
    Patent number: 4127628
    Abstract: A molded gypsum product comprises a matrix of crystalline gypsum and reinforcing fibers of glass fiber and asbestos fiber uniformly distributed in said matrix in a multi-layer structure having at least one higher density layer and at least one lower density layer which is continuously adjacent to said higher density layer and having an average apparent bulk density of 0.3 to 0.9 g/cc.
    Type: Grant
    Filed: April 19, 1977
    Date of Patent: November 28, 1978
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Mitsuo Uchida, Takeshi Fushiki, Mitsuru Awata
  • Method of producing maleic anhydride
    Patent number: 4127591
    Abstract: A method of producing maleic anhydride by oxidizing a hydrocarbon material selected from unsaturated hydrocarbons having four or more of carbon atoms, butane and mixtures thereof with molecular oxygen or a molecular oxygen containing gas in gaseous phase and in the presence of a catalyst. The catalyst used in this method is of the type which contains vanadium, phosphorus, potassium and iron, and these components are contained in the following ratios per atom of vanadium: phosphorus, 2/3 to 140 atoms; potassium, 1/4 to 2 atoms; and iron, 1/10 to 70 atoms. Preferably the atomic ratio of phosphorus/iron is greater than 1.
    Type: Grant
    Filed: December 23, 1976
    Date of Patent: November 28, 1978
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Shigeo Kamimura, Tadaaki Otaki
  • N.sup.2 -naphthalenesulfonyl-L-arginine derivatives and the pharmaceutically acceptable acid addition salts thereof
    Patent number: 4125619
    Abstract: N.sup.2 -naphthalenesulfonyl-L-arginine esters and amides and the pharmaceutically acceptable salts thereof have been found to be effective as pharmaceutical agents for the inhibition and suppression of thrombosis.
    Type: Grant
    Filed: January 19, 1977
    Date of Patent: November 14, 1978
    Assignees: Mitsubishi Chemical Industries, Ltd., Shosuke Okamoto
    Inventors: Shosuke Okamoto, Ryoji Kikumoto, Kazuo Ohkubo, Tohru Tezuka, Shinji Tonomura, Yoshikuni Tamao, Akiko Hijikata
  • N.sup.2 -Arylsulfonyl-L-argininamides and the pharmaceutically acceptable salts thereof
    Patent number: 4117127
    Abstract: N.sup.2 -arylsulfonyl-L-argininamides and the pharmaceutically acceptable salts thereof have been found to be effective as pharmaceutical agents for the inhibition and suppression of thrombosis in mammals.
    Type: Grant
    Filed: October 21, 1977
    Date of Patent: September 26, 1978
    Assignees: Mitsubishi Chemical Industries Ltd., Shosuke Okamoto
    Inventors: Shosuke Okamoto, Akiko Hijikata, Ryoji Kikumoto, Yoshikuni Tamao, Kazuo Ohkubo, Tohru Tezuka, Shinji Tonomura
  • Cyanotriphenodioxazine compound
    Patent number: 4116623
    Abstract: A novel cyanotriphenodioxazine compound is disclosed which is represented by the following formula: ##STR1## wherein X represents cyano or halogen, R.sup.1 represents C.sub.1 -C.sub.4 alkylene and R.sup.2 represents C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy-C.sub.1 -C.sub.4 alkyl or C.sub.1 -C.sub.4 alkoxy-C.sub.1 -C.sub.4 alkoxy-C.sub.1 -C.sub.4 alkyl and is a dyestuff suitable for dyeing synthetic fibers or cellulose acetate fibers in brilliant red shade with good fastness to light and to sublimation.
    Type: Grant
    Filed: July 25, 1977
    Date of Patent: September 26, 1978
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Seiichi Imahori, Yukichi Murata, Sumio Suzuki
  • Preparation of solid titanium trichloride
    Patent number: 4115533
    Abstract: Solid titanium trichloride in the form of fine granules having low aluminum compound content, which is suitable as a catalyst for polymerization of .alpha.-olefins, especially, propylene is obtained as a precipitate by heating liquefied titanium trichloride in the presence of a liberating agent, and separating the thus formed precipitate. The liquified titanium trichloride is preferably prepared with an reducing titanium tetrachloride by organic aluminum compound in the presence of ether and hydrocarbon.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: September 19, 1978
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Kazuo Yamaguchi, Genjiro Kakogawa, Masayoshi Hasuo, Nobuaki Goko, Yasuo Maruyama
  • Preparation of solid titanium trichloride
    Patent number: 4115532
    Abstract: Solid titanium trichloride in the form of fine granules having low aluminum compound content, which is suitable as a catalyst for polymerization of .alpha.-olefins, especially, propylene is obtained as a precipitate by heating liquefied titanium trichloride in the presence of a liberating agent, and separating the thus formed precipitate. The liquefied titanium trichloride is preferably prepared with an reducing titanium tetrachloride by organic aluminium compound in the presence of ether and hydrocarbon.
    Type: Grant
    Filed: August 1, 1977
    Date of Patent: September 19, 1978
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Kazuo Yamaguchi, Genjiro Kakogawa, Masayoshi Hasuo, Nobuaki Goko, Yasuo Maruyama
  • Method of treating exhaust gas discharged from nitric acid plant
    Patent number: 4115516
    Abstract: A compressed exhaust gas containing nitrogen oxides discharged from a compressed absorption type nitric acid plant is treated by adding ammonia or an ammonia precursor to the gas and passing the gas through a NO.sub.x removing catalytic layer to an exhaust gas turbine wherein the temperature of the main flow of the exhaust gas in the zone from the point of which ammonia or an ammonia precursor is added to the outlet of the exhaust gas turbine is maintained at a temperature higher than T.degree. K = 10.sup.3 / (1.91 - 0.228 log P) [P : a sum of partial pressures of ammonia and nitrogen oxides (atm.)] and feeding an inert gas into the place of the zone in which the exhaust gas stagnates.
    Type: Grant
    Filed: June 10, 1977
    Date of Patent: September 19, 1978
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Koichi Takami, Shingo Abe, Yukio Takigawa, Toshinori Tsutsumi, Yoshio Kinsho
  • Process for the renewal of an insolubilized glucose isomerase
    Patent number: 4113568
    Abstract: There is disclosed a process for the renewal of a deactivated insolubilized glucose isomerase which comprises subjecting an insolubilized glucose isomerase adsorbed onto an anion exchange resin, which has been used for isomerization of glucose into fructose to decrease its activity, to treatments by an aqueous mineral acid solution in combination with an aqueous alkaline solution, an aqueous electrolytic salt solution, an aqueous mineral acid or a mixture thereof to release adsorbed materials from the resin which is converted into a salt type and adsorbing fresh glucose isomerase to the regenerated resin to recover the activity of the insolubilized glucose isomerase.
    Type: Grant
    Filed: March 24, 1977
    Date of Patent: September 12, 1978
    Assignees: Mitsubishi Chemical Industries, Ltd., Seikagaku Kogyo Co., Ltd.
    Inventors: Yoshimasa Fujita, Akiyoshi Matsumoto, Isao Miyachi, Nobuo Imai, Isao Kawakami, Tadashi Hishida, Akira Kamata