Patents by Inventor Kengo Soda

Kengo Soda 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).

  • Catalyst and method for clarifying exhaust gas
    Patent number: 7405175
    Abstract: A proton type ? zeolite is used as catalyst. Nitrogen oxides in the exhaust gas containing excessive oxygen is reduced/removed by making the exhaust gas contact with the catalyst under the existence of methanol and/or dimethyl ether as reducing agent. It is desirable that a SiO2/Al2O3 molar ratio of the proton type ? zeolite is within 20-70. Thereby, the present catalyst has an excellent denitration performance and durability even against the exhaust gas containing sulfur oxides, and the denitration performance does not deteriorate even when the exhaust gas is at comparatively low temperature of 300-400° C.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: July 29, 2008
    Assignee: Sumitomo Metal Mining Co., Ltd.
    Inventors: Masashi Sugiyama, Kengo Soda
  • Catalyst and method for clarifying exhaust gas
    Publication number: 20050207957
    Abstract: A proton type ? zeolite is used as catalyst. Nitrogen oxides in the exhaust gas containing excessive oxygen is reduced/removed by making the exhaust gas contact with the catalyst under the existence of methanol and/or dimethyl ether as reducing agent. It is desirable that a SiO2/Al2O3 molar ratio of the proton type ? zeolite is within 20-70. Thereby, the present catalyst has an excellent denitration performance and durability even against the exhaust gas containing sulfur oxides, and the denitration performance does not deteriorate even when the exhaust gas is at comparatively low temperature of 300-400° C.
    Type: Application
    Filed: June 3, 2003
    Publication date: September 22, 2005
    Inventors: Masashi Sugiyama, Kengo Soda