Patents by Inventor Susumu Hikazutani

Susumu Hikazutani 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).

  • High-temperature denitration catalysts and processes for preparing same
    Patent number: 7396518
    Abstract: The present invention provides a method of high-temperature denitration characterized in that NOx in an exhaust gas is reduced at 450° to 800° C. using ammonia as a reducing agent in the presence of a catalyst which comprises zirconium oxide and SO3 or SO42? and has solid acid strength (Ho) of ?11.93 or lower. The present invention also provides a method of high temperature denitration characterized in that NOx in an exhaust gas is reduced at 450° to 800° C. using ammonia as a reducing agent in the presence of a catalyst wherein at least one of tungsten oxide, molybdenum oxide and boron oxide is supported on a carrier comprising zirconium oxide and SO3 or SO42? and having solid acid strength (Ho) of ?11.93 or lower.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: July 8, 2008
    Assignee: Hitachi Zosen Corporation
    Inventors: Masayoshi Ichiki, Kazuhiro Yano, Susumu Hikazutani
  • High temperature denitrification catalyst and method for preparation thereof
    Publication number: 20050159304
    Abstract: A purpose of the present invention is to provide a method of enabling denitration of an exhaust gas effectively at 450° to 600° C. and catalysts to be used for the method. A first catalyst comprises a composite oxide composed of titanium oxide and at least one of tungsten oxide, molybdenum oxide and boron oxide and having solid acid strength (Ho) of ?11.93 or lower. A second catalyst is a high-temperature denitration catalyst which comprises zirconium oxide and SO3 or SO42?, has solid acid strength (Ho) of ?11.93 or lower and is used at a reaction temperature of 450° to 800° C. A third catalyst is a high-temperature denitration catalyst wherein at least one of tungsten oxide, molybdenum oxide and boron oxide is supported on a carrier comprising zirconium oxide and SO3 or SO42? and having solid acid strength (Ho) of ?11.93 or lower and which is used at a reaction temperature of 450° to 800° C.
    Type: Application
    Filed: March 27, 2003
    Publication date: July 21, 2005
    Applicant: HITACHI ZOSEN CORPORATION
    Inventors: Masayoshi Ichiki, Kazuhiro Yano, Susumu Hikazutani