Patents by Inventor Kunio Koga

Kunio Koga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11421599
    Abstract: A gas turbine combustor including a fuel injector having a plurality of annular fuel injection portions in each of which multiple fuel injection holes are formed, is provided with: an auxiliary fuel introduction passage for introducing an auxiliary fuel that is to be supplied to an auxiliary fuel injection portion that is a part of the plurality of annular fuel injection portions, into the fuel injector; a first main fuel introduction passage provided with a flow regulating valve for introducing a main fuel that is to be supplied to a main fuel injection portion that is an annular fuel injection portion other than the auxiliary fuel injection portion, into the fuel injector; and a second main fuel introduction passage provided with a flow regulating valve for introducing the main fuel that is to be supplied to the auxiliary fuel injection portion, into the fuel injector.
    Type: Grant
    Filed: November 12, 2019
    Date of Patent: August 23, 2022
    Assignee: KAWASAKI JUKOGYO KABUSHIKI KAISHA
    Inventors: Atsushi Horikawa, Masahide Kazari, Kunio Okada, Kazuki Koga
  • Patent number: 5847224
    Abstract: A process for improving the color of oxygenates, such as MTBE, ETBE and TAME, which utilizes a hydrogenation treater in the presence of a catalyst, containing at least one noble metal, along with a circulation of hydrogen to remove the color. The process reduces existing color bodies in the oxygenate and may proceed at room temperature and at normal pressure for economically providing a completely clear product having a +30 saybolt number.
    Type: Grant
    Filed: June 23, 1995
    Date of Patent: December 8, 1998
    Assignee: Global Octanes Corporation
    Inventors: Kunio Koga, Misao Mori
  • Patent number: 5446176
    Abstract: Disclosed are the improvements of a process for the preparation of a purified 3,4-epoxycyclohexyl methyl (meth)acrylate and 3,4-epoxycyclohexyl methyl (meth)acrylate which is prepared by the improvements, including only minor amounts of polymers having a low molecular weight composed of 3,4-epoxycyclohexyl methyl (meth)acrylate itself.Furthermore, disclosed is a 3,4-epoxycyclohexyl methyl (meth)acrylate composition which has an excellent resistance to coloring, including a specified organic phosphorous compound.
    Type: Grant
    Filed: January 10, 1995
    Date of Patent: August 29, 1995
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Akihiro Kuwana, Kimihide Honda, Kunio Koga
  • Patent number: 5426193
    Abstract: Disclosed are the improvements of a process for the preparation of a purified 3,4-epoxycyclohexyl methyl (meth)acrylate and 3,4-epoxycyclohexyl methyl (meth)acrylate which is prepared by the improvements, including only minor amounts of polymers having a low molecular weight composed of 3,4-epoxycyclohexyl methyl (meth)acrylate itself.Furthermore, disclosed is a 3,4-epoxycyclohexyl methyl (meth)acrylate composition which has an excellent resistance to coloring, including a specified organic phosphorous compound.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: June 20, 1995
    Assignee: Daicel Chemical Industries, Inc.
    Inventors: Akihiro Kuwana, Kimihide Honda, Kunio Koga
  • Patent number: 5414147
    Abstract: A method for improving the conversion of isobutylene in the MTBE reaction process while simultaneously producing a substantially methanol-free MTBE utilizes an increased methanol to isobutylene molar ratio in the reaction process and methanol-free C4 hydrocarbons as reflux. The use of a methanol-free C4 hydrocarbon stream as reflux eliminates the excess methanol generated by increasing the methanol to isobutylene molar ratio without requiring a higher reflux ratio or changing operating conditions. The method permits isobutylene conversion of more than 98% while producing a purified MTBE with less than 0.5% methanol content.
    Type: Grant
    Filed: August 24, 1993
    Date of Patent: May 9, 1995
    Assignee: Global Octanes Corporation
    Inventor: Kunio Koga
  • Patent number: 5382676
    Abstract: Disclosed are the improvements of a process for the preparation of a purified 3,4-epoxycyclohexyl methyl(meth)acrylate and 3,4-epoxyeyclohexyl methyl(meth)acrylate which is prepared by the improvements, including only minor amounts of polymers having a low molecular weight composed of 3,4-epoxycyclohexyl methyl(meth)acrylate itself.Furthermore, disclosed is a 3,4-epoxycyclohexyl methyl(meth)acrylate composition which has an excellent resistance to coloring, including a specified organic phosphorous compound.
    Type: Grant
    Filed: August 19, 1993
    Date of Patent: January 17, 1995
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Akihiro Kuwana, Kimihide Honda, Kunio Koga
  • Patent number: 4883912
    Abstract: In a process for the recovery of acetic acid by extracting acetic acid from an aqueous acetic acid solution containing a metallic salt of sulfuric acid with an organic extractant comprising a tertiary amine and an organic diluent and recovering acetic acid from the liquid extract, a mixture of a tertiary amine containing sulfuric acid and an organic diluent is used as an organic extractant so as to suppress energy consumption and to increase extraction efficiency.
    Type: Grant
    Filed: May 14, 1986
    Date of Patent: November 28, 1989
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Kunio Koga, Koji Shima, Mutsumi Samejima
  • Patent number: 4737318
    Abstract: Acetic anhydride is recovered from a mixture of acetic anhydride, acetic acid and water by contacting the mixture with at least one extraction solvent selected from the group consisting of a hydrophobic, organic solvent, a ketone and an ester to extract and recover acetic anhydride.
    Type: Grant
    Filed: September 19, 1986
    Date of Patent: April 12, 1988
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Masaaki Ichino, Kunio Koga, Tsutomu Mizuta, Takashi Matsuyama
  • Patent number: 4658057
    Abstract: In extracting a solute from an aqueous solution using a mixer-settler extractor and an organic extractant comprising a mixture of a tertiary amine and an organic diluent, the extractor is operated while the liquid phase inside the mixer thereof is kept in a state of solvent dispersion. Thus, the mixer-settler extractor can be operated efficiently.
    Type: Grant
    Filed: January 10, 1984
    Date of Patent: April 14, 1987
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Kunio Koga, Yukihiro Sasaki, Hirotoshi Niwa
  • Patent number: 4567305
    Abstract: Allyl alcohol is hydroformylated with a gaseous mixture of hydrogen and carbon monoxide, in an aromatic hydrocarbon, in the presence of a rhodium complex and a trisubstituted phosphine, to form hydroxybutyraldehydes which are separated from the reaction mixture within an aqueous medium. The carbon monoxide partial pressure, the rate of consumption of carbon monoxide, the rate at which the carbon monoxide is dissolved in the reaction mixture, reaction temperature and the viscosity of the reaction mixture are selected and controlled in an interrelated way to give a high yield of 4-hydroxybutyraldehyde and reduced catalyst consumption.
    Type: Grant
    Filed: June 15, 1984
    Date of Patent: January 28, 1986
    Assignees: Kuraray Company, Ltd., Daicel Chemical Industries, Ltd.
    Inventors: Mitsuo Matsumoto, Shinichi Miura, Koichi Kikuchi, Masuhiko Tamura, Hidetaka Kojima, Kunio Koga, Shigeru Yamashita
  • Patent number: 4562288
    Abstract: In extracting object material from its aqueous solution by using an organic solvent, a mixer-settler extractor is employed as the extractor and operated while a solvent dispersion is maintained in the mixer, and part of the aqueous phase discharged from the settler is recycled to the mixer so that the organic solvent phase in the mixer is stably maintained as the disperse phase.
    Type: Grant
    Filed: January 10, 1984
    Date of Patent: December 31, 1985
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Kunio Koga, Yukihiro Sasaki, Mutsumi Samejima
  • Patent number: 4353784
    Abstract: Disclosed is a method of recovering acetic acid by extracting from an acetic acid-containing aqueous solution with an organic extracting agent and subjecting the extract to distillation, said method comprising the first step of performing extraction by using a tertiary amine having a boiling point higher than that of acetic acid and being capable of forming a non-aqueus phase as the organic extracting agent in combination with an oxygen-containing, high-boiling-point organic solvent selected from the group consisting of di-isobutylcarbinol, isophorene, methyl benzoate, tributyl phosphate, 3,3,5-trimethylcyclohexanone and 2-ethoxyethyl acetate, the second step of performing dehydration by subjecting the extract to distillation, and the third step of subjecting the dehydrated mixture to distillation in a reduced pressure distillation column at a column bottom temperature of 120.degree. to 170.degree. C. to distill acetic acid and separate it from the organic extracting agent.
    Type: Grant
    Filed: September 21, 1981
    Date of Patent: October 12, 1982
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Kunio Koga, Ryoichi Kishimoto