Patents by Inventor Tsunekichi Kuriyama

Tsunekichi Kuriyama 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).

  • Combustion exhaust gas treatment process and treatment apparatus
    Patent number: 6752975
    Abstract: Denitrated combustion exhaust gas is desulfurized with ammonia, the waste water obtained from washing the desulfurization waste water or dust ash is filtered using calcium carbonate, the pH of the filtrate is adjusted, carbon dioxide and/or aqueous carbonic acid is added and then a flocculating agent is added, and ammonia is recovered from the supernatant after precipitation and separation of the solid portion. The recovered ammonia is added to the denitrated gas for treatment of the combustion exhaust gas.
    Type: Grant
    Filed: March 29, 2002
    Date of Patent: June 22, 2004
    Assignee: Showa Denko K.K.
    Inventors: Toshio Ohi, Yoshiharu Mizuno, Tatsuharu Arai, Koichi Nishimura, Tsunekichi Kuriyama, Yasuaki Toyomasu, Toshitaka Hiro
  • Combustion exhaust gas treatment process and treatment apparatus
    Publication number: 20020155038
    Abstract: Denitrated combustion exhaust gas is desulfurized with ammonia, the waste water obtained from washing the desulfurization waste water or dust ash is filtered using calcium carbonate, the pH of the filtrate is adjusted, carbon dioxide and/or aqueous carbonic acid is added and then a flocculating agent is added, and ammonia is recovered from the supernatant after precipitation and separation of the solid portion. The recovered ammonia is added to the denitrated gas for treatment of the combustion exhaust gas.
    Type: Application
    Filed: March 29, 2002
    Publication date: October 24, 2002
    Inventors: Toshio Ohi, Yoshiharu Mizuno, Tatsuharu Arai, Koichi Nishimura, Tsunekichi Kuriyama, Yasuaki Toyomasu, Toshitaka Hiro