Patents by Inventor Harumichi Semoto

Harumichi Semoto 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).

  • Method for purification of silicon tetrachloride
    Patent number: 8273316
    Abstract: An object of the present invention is to provide a method for purification of silicon tetrachloride which solves the problems of separating and removing organic chlorosilanes by distillation or adsorption. The method for purification of silicon tetrachloride comprises the steps of (1) bringing a mixed gas including a silicon tetrachloride gas and an oxygen-containing gas into contact with a catalyst layer which is controlled to a temperature of 200 to 450° C. and which includes at least one selected from the group consisting of activated carbon and metal-supporting activated carbon, and (2) cooling the mixed gas after brought into contact to separate and recover liquid silicon tetrachloride.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: September 25, 2012
    Assignees: JNC Corporation, JX Nippon Mining & Metals Corporation, Toho Titanium Co., Ltd.
    Inventors: Satoshi Hayashida, Harumichi Semoto
  • METHOD FOR PURIFICATION OF SILICON TETRACHLORIDE
    Publication number: 20110142742
    Abstract: An object of the present invention is to provide a method for purification of silicon tetrachloride which solves the problems of separating and removing organic chlorosilanes by distillation or adsorption. The method for purification of silicon tetrachloride comprises the steps of (1) bringing a mixed gas including a silicon tetrachloride gas and an oxygen-containing gas into contact with a catalyst layer which is controlled to a temperature of 200 to 450° C. and which includes at least one selected from the group consisting of activated carbon and metal-supporting activated carbon, and (2) cooling the mixed gas after brought into contact to separate and recover liquid silicon tetrachloride.
    Type: Application
    Filed: August 19, 2009
    Publication date: June 16, 2011
    Applicants: CHISSO CORPORATION, JX NIPPON MINING & METALS CORPORATION, TOHO TITANIUM CO., LTD.
    Inventors: Satoshi Hayashida, Harumichi Semoto