Patents Assigned to Research Association for Utilization of Light Oil
  • Patent number: 5362696
    Abstract: A process for producing a spherical zeolite catalyst is disclosed, which comprises dropping a zeolite-containing alumina sol into a surfactant-containing oil phase from a dropping opening directly or through air to thereby form spherical droplets of the sol, and then allowing the droplets to gel in an aqueous alkaline solution phase underlying the oil phase and withdrawing the thus gelled droplets, said dropping of the sol being conducted while the dropping opening is being impulsed to thereby impart a spherical and uniform shape to the resulting zeolite particles containing alumina as a binder, and a novel apparatus therefor.
    Type: Grant
    Filed: March 11, 1992
    Date of Patent: November 8, 1994
    Assignee: Research Association for the Utilization of Light Oil
    Inventors: Kazuo Takahashi, Fumio Kumata, Hitoshi Nozaki, Shinichi Inoue, Toshiji Makabe
  • Patent number: 5321179
    Abstract: A process for producing modified crystalline galloalumino silicate having the ZSM-5 crystal structure, and a process for producing aromatic hydrocarbons by the use of a catalyst containing the above modified crystalline galloalumino silicate are disclosed. The modified crystalline galloalumino silicate having the ZSM-5 type crystal structure is produced by calcining galloalumino silicate having the ZSM-5 type crystal structure as obtained by the hydrothermic reaction, at a temperature of 700 to 1,000.degree. C. The aromatic hydrocarbons are produced by contacting hydrocarbons having 2 to 12 carbon atoms with a catalyst containing the above modified crystalline galloalumino silicate.
    Type: Grant
    Filed: January 6, 1993
    Date of Patent: June 14, 1994
    Assignee: Research Association for Utilization of Light Oil
    Inventor: Junichi Kanai
  • Patent number: 5306682
    Abstract: A crystalline silicate catalyst having deposited coke thereon is regenerated by being contacted with an oxygen-containing gas having a moisture content of 0.2% by volume or less at a temperature of 400.degree.-600.degree. C.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: April 26, 1994
    Assignee: Research Association for the Utilization of Light Oil
    Inventors: Masaaki Ueda, Teruo Murakami, Shunji Shibata, Kazuo Hirabayashi, Tadami Kondoh, Kohji Adachi, Nobuko Hoshino, Shinichi Inoue
  • Patent number: 5279951
    Abstract: A process for cultivating a microorganism transformed with a recombinant plasmid at least containing (a) a DNA fragment containing a promoter and a regulator gene tnaC located downstream of the promoter in a tryptophanase operon (tna), and (b) a DNA fragment containing a desired structural gene which can be expressed by the promoter, which comprises cultivating the transformed microorganism in a culture medium while adding glucose as a carbon source continuously or intermittently so that the concentration of glucose is maintained within the range of 0.01 to 0.3%, and thereby allowing the desired structural gene to be expressed in the microorganism.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: January 18, 1994
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Masato Terasawa, Hisashi Yamagata, Hideaki Yukawa, Yasurou Kurusu, Makiko Fukushima
  • Patent number: 5276232
    Abstract: The process of this invention produces high-octane gasoline blending stock advantageously by treating light hydrocarbons mainly comprising of paraffins and/or olefins having 2 to 7 carbon atoms at a hydrogen partial pressure of 5 kg/cm.sup.2 or less and at a temperature of 350.degree. to 650.degree. C. in the presence of a catalyst composition containing ammonia-modified crystalline aluminogallosilicates of high initial activity and long life obtained by contacting hydrogen type aluminogallosilicates with ammonia under a dry condition as catalyst component.
    Type: Grant
    Filed: April 16, 1993
    Date of Patent: January 4, 1994
    Assignee: Research Association For Utilization of Light Oil
    Inventors: Shinichi Inoue, Toshiji Makabe, Tatsuo Morimoto, Kazutomo Shimizu
  • Patent number: 5256551
    Abstract: A method of selectively inhibiting pyruvic acid decomposition activity in microorganism cells containing tryptophanase or a treated product thereof, which comprises heat-treating said cells or the treated product thereof in the presence of an ammonium ion.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: October 26, 1993
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Masato Terasawa, Mitsunobu Shimazu, Fuzio Endo, Hideaki Yukawa
  • Patent number: 5225593
    Abstract: A process for preparing pyruvate in high yield is disclosed, comprising reacting propylene glycol with molecular oxygen in an aqueous solution in the presence of a platinum catalyst containing a metallic component selected from the group consisting of lead, thallium, and cadmium while controlling the pH of the reaction mixture between 7 and 9. The crude pyruvate can be purified by treating with activated carbon in the presence of water.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: July 6, 1993
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Makoto Imanari, Katufumi Kujira, Hiroshi Iwane
  • Patent number: 5208378
    Abstract: A process for the production of a water-soluble carbodiimide, which comprises(1) allowing ethyl isothiocyanate to react with N,N-dimethyl-1,3-propanediamine in an aromatic hydrocarbon solvent (first reaction step),(2) removing hydrogen sulfide from a thiourea derivative formed in the first reaction step upon adding a hydrogen sulfide removing agent without isolating the thiourea derivative (second reaction step), and(3) recovering a water-soluble carbodiimide from the resulting reaction mixture.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: May 4, 1993
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Takahiro Yoneyama, Masaki Odagiri, Makoto Imanari
  • Patent number: 5202513
    Abstract: A process for producing modified crystalline galloalumino silicate having the ZSM-5 crystal structure, and a process for producing aromatic hydrocarbons by the use of a catalyst containing the above modified crystalline galloalumino silicate are disclosed. The modified crystalline galloalumino silicate having the ZSM-5 type crystal structure is produced contacting with a 0.1-2N aqueous alkali hydroxide, followed by calcining galloalumino silicate having the ZSM-5 type crystal structure as obtained by the hydrothermic reaction, at a temperature of 700.degree. to 1,000.degree. C. The aromatic hydrocarbons are produced by contacting hydrocarbons having 2 to 12 carbon atoms with a catalyst containing the above modified crystalline galloalumino silicate.
    Type: Grant
    Filed: February 21, 1992
    Date of Patent: April 13, 1993
    Assignee: Research Association for Utilization of Light Oil
    Inventor: Junichi Kanai
  • Patent number: 5196631
    Abstract: The catalyst is an L-type zeolite with platinum supported thereon, which is then treated with a halogen-containing compound. The catalyst has a long catalyst life and is extremely useful for the preparation of aromatic hydrocarbons from aliphatic hydrocarbons. The process using the catalyst provides a production of aromatic hydrocarbons with a high yield.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: March 23, 1993
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Takashi Murakawa, Hisashi Katsuno
  • Patent number: 5191131
    Abstract: A paraffin having 5 to 10 carbon atoms is catalytically cracked in the presence of a catalytically cracking catalyst having a strong acidity, especially a rare earth metal ion-exchanged mordenite or a dealuminized mordenite, to form a paraffin having 3 or 4 carbon atoms. The formed paraffin is contacted with a dehydrogenation catalyst to obtain an olefin having 3 or 4 carbon atoms.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: March 2, 1993
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Kazunori Takahata, Toshihiro Murashige, Yukimasa Shigemura, Hiroshi Takaki, Akihiko Okano
  • Patent number: 5120898
    Abstract: A solid strong acid catalyst useful for hydrocarbon reactions, especially for the skeletal isomerization of paraffinic hydrocarbons is provided by supporting sulfate (SO.sub.4) and at least one member selected from Group VIII metals on a support consisting of hydroxides and oxides of Group IV metals and Group III metals and mixtures thereof and then calcining and stabilizing the catalyst.
    Type: Grant
    Filed: May 15, 1991
    Date of Patent: June 9, 1992
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Shigeo Baba, Yukio Shibata, Takahiro Kawamura, Hideo Takaoka, Tsuguo Kimura, Kazuo Kousaka, Yoshihiro Minato, Naruo Yokoyama, Kozo Iida, Tetsuya Imai
  • Patent number: 5091351
    Abstract: The catalyst is an L-type zeolite with platinum supported thereon, which is then treated with a halogen-containing compound. The catalyst has a long catalyst life and is extremely useful for the preparation of aromatic hydrocarbons from aliphatic hydrocarbons. The process using the catalyst provides a production of aromatic hydrocarbons with a high yield.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: February 25, 1992
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Takashi Murakawa, Hisashi Katsuno
  • Patent number: 5073673
    Abstract: A high-octane gasoline is produced by the conversion of a light hydrocarbon containing C.sub.2 -C.sub.7 paraffins and/or C.sub.2 -C.sub.7 olefins using a crystalline aluminogallosilicate containing about 0.1-2.5% by weight of aluminum and about 0.1-5% by weight of gallium in the skeleton thereof and having a particle size in the range of about 0.05-20 .mu.m, with at least 80% by weight of the crystalline aluminogallosilicate having a particle size of 0.1-10 .mu.m.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: December 17, 1991
    Assignee: Research Association for the Utilization of Light Oil
    Inventors: Kazuo Hirabayashi, Tadami Kondoh, Hiroaki Nishijima, Shinichi Inoue, Kouji Adachi, Fumiho Igarashi, Toshio Wakai
  • Patent number: 5073652
    Abstract: The aromatic hydrocarbons rich in benzene, toluene and xylene are prepared from a hydrocarbon feed having from 6 to 12 carbon atoms by feeding the hydrogen in admixture with hydrogen in a ratio ranging from 0 to less than 1 mole with respect to each mole of the hydrocarbon, into contact with a catalyst prepared by depositing at least one metal belonging to group VIII of the periodic table on a macroporous zeolite treated with a halogenated compound. The aromatic hydrocarbons rich in benzene, toluene and xylene are useful as a base for high octane number gasoline or as petrochemical raw materials.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: December 17, 1991
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Hisashi Katsuno, Michio Sugimoto
  • Patent number: 5036035
    Abstract: A solid strong acid catalyst useful for hydrocarbon reactions, especially for the skeletal isomerization of paraffinic hydrocarbons is provided by supporting sulfate (SO.sub.4) and at least one member selected from Group VIII metals on a support consisting of hydroxides and oxides of Group IV metals and Group III metals and mixtures thereof and then calcining and stabilizing the catalyst.
    Type: Grant
    Filed: March 21, 1989
    Date of Patent: July 30, 1991
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Shigeo Baba, Yukio Shibata, Takahiro Kawamura, Hideo Takaoka, Tsuguo Kimura, Kazuo Kousaka, Yoshihiro Minato, Naruo Yokoyama, Kozo Iida, Tetsuya Imai
  • Patent number: 5030750
    Abstract: Disclosed is a process for preparing DL-serine, which comprises synthesizing DL-serine according to Strecker reaction with use of a cyan compound, ammonium chloride, ammonia and a reaction substrate comprising glycol aldehyde, wherein the Strecker reaction is carried out under the reaction conditions of:molar ratios of the starting materials of:glycol aldehyde/cyan compound: more than 1.0 and not more than 1.50ammonium chloride/glycol aldehyde: more than 1.0 and not more than 2.0ammonium/cyan compound: 1.0 to 7.0reaction temperature: 20.degree. to 80.degree. C.reaction time: 15 to 120 minutes,and the reaction product obained in hydrolyzed.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: July 9, 1991
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Katufumi Kuzira, Masaki Odagiri, Makoto Imanari, Takashi Yokoi
  • Patent number: 5026922
    Abstract: There is disclosed a process for preparing glycol aldehyde from ethylene glycol by use of a complex system catalyst comprising copper and other inorganic component, which comprises permitting 0.001 to 0.3 mole of oxygen per one mole of ethylene glycol to be copresent in the reaction system.
    Type: Grant
    Filed: December 22, 1989
    Date of Patent: June 25, 1991
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Takatoshi Seto, Takashi Yokoi, Masaki Odagiri, Makoto Imanari
  • Patent number: 4994254
    Abstract: A high-octane gasoline is produced by the conversion of a light hydrocarbon containing C.sub.2 -C.sub.7 paraffins and/or C.sub.2 -C.sub.7 olefins using a crystalline aluminogallosilicate catalyst of the formula:aM.sub.2/n O bAl.sub.2 O.sub.3 Ga.sub.2 O.sub.3 cSiO.sub.2 dH.sub.2 Owherein M is a metal selected from an alkali metal, an alkaline earth metal and a mixture thereof, n is the valence of said metal, a is a positive number of (b+1).+-.3.0, b is between 1 and 6, c is between 80 and 490, d is between 1 and 200, c/(b+1) is between 40 and 70, and c/b is between 46.7-140.
    Type: Grant
    Filed: March 14, 1989
    Date of Patent: February 19, 1991
    Assignee: Research Association For Utilization Of Light Oil
    Inventors: Isao Suzuki, Kazuo Hirabayashi
  • Patent number: 4962251
    Abstract: A process for producing aromatic hydrocarbons in a high yield by introducing a naphtha fraction the cyclopentane content of which is controlled to not more than 1% by weight, or the methylpentane content is controlled to not more than 10% by weight, in a catalytic reaction tower, and contacting with a catalyst comprising a large pore zeolite containing at least one of Group VII metals of the Periodic Table. In this process, the catalyst cycle is greatly lengthened.
    Type: Grant
    Filed: December 28, 1989
    Date of Patent: October 9, 1990
    Assignee: Research Association for Utilization of Light Oil
    Inventors: Takashi Yamamoto, Toshikazu Yoneda, Hisashi Katsuno, Takashi Murakawa, Nobuyuki Takahashi