Patents by Inventor Taketoshi Honma

Taketoshi Honma 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 purifying hydrogen sulfide-containing gas
    Patent number: 3932584
    Abstract: Hydrogen sulfide-containing waste gases whose complete treatment is indispensable from the viewpoint of environmental pollution problem, are purified in two steps consisting of a first step in which the gases are absorbed in an aqueous solution of sodium hydroxide or/and sodium sulfide, and a second step in which sulfuric acid and sulfur dioxide gas are simultaneously introduced into the resulting solution after absorption to deposit sulfur. Further, for recovery of the resulting sulfur, a particular apparatus is provided.
    Type: Grant
    Filed: January 25, 1974
    Date of Patent: January 13, 1976
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Tokuzo Asakusa, Taketoshi Honma, Isao Hirashita, Koichi Yasui, Yoshio Nishi, Koichi Murayama