Patents by Inventor Tsutomu Shikada

Tsutomu Shikada 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).

  • Catalytic oxidation of ammonia
    Patent number: 5139756
    Abstract: A process for decomposing ammonia recovered from coke oven gas through catalytic oxidation in the presence of oxygen gas, which comprises contacting a catalyst containing at least copper oxide or vanadium oxide in a fluidized state with the ammonia vapor. In the process of the invention, the reaction can be conducted at a low temperature of 400.degree. to 600.degree. C. and the generation of NO.sub.x is very small in quantity.
    Type: Grant
    Filed: January 21, 1992
    Date of Patent: August 18, 1992
    Assignee: NKK Corporation
    Inventors: Tsutomu Shikada, Minoru Asanuma, Yakudo Tachibana
  • Method of decomposing ammonia using a ruthenium catalyst
    Patent number: 5055282
    Abstract: For carrying out a process for decomposing, into hydrogen and nitrogen, ammonia recovered from a coke oven gas by combining a catalytic combustion of ammonia and a catalytic decomposition of ammonia utilizing a waste heat by said combustion, a basic compound as a required catalyzer is added to ruthenium supported on alumina, or ruthenium as a required catalyzer is supported on a basic compound, whereby ammonia may be decomposed effectively at ranges of low temperatures as not more than 500.degree. C.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: October 8, 1991
    Assignee: NKK Corporation
    Inventors: Tsutomu Shikada, Minoru Asanuma, Takao Ikariya
  • Method for purifying exhaust gases with hydrogensulfates
    Patent number: 4478801
    Abstract: A process for purifying exhaust gases is disclosed. Exhaust gases discharged when coal or petroleum is burned are forced to pass through reaction media consisting of molten salts whose major component is a hydrogensulfate or hydrogensulfates, whereby desulfurization and denitration can be effected by one step. Harmful compounds such as sulfur oxides, nitrogen oxides and dust particles in the exhaust gases can be efficiently removed and the purified gases can be smoothly diffused.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: October 23, 1984
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Hiroo Tominaga, Kaoru Fujimoto, Tsutomu Shikada