Patents by Inventor Yasuto Iwai

Yasuto Iwai 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).

  • Process for the liquid phase oxidation of organic substance-containing effluents
    Patent number: 4094780
    Abstract: A process for the liquid phase oxidation of an organic substance-containing effluent which comprises subjecting said effluent to a liquid phase oxidation treatment in the presence of a copper catalyst at a copper ion concentration of 50-5000 ppm and also in presence of an ammonium ion concentration of five or more times the copper ion concentration thereby to oxidize the organic substances in the effluent, and recovering the copper catalyst from the treated effluent for reuse. The recovery of the copper catalyst may be effected either by a process in which the copper catalyst is separated as a precipitate or by a process using a resin adsorption.
    Type: Grant
    Filed: August 12, 1976
    Date of Patent: June 13, 1978
    Assignee: Mitsui Toatsu Chemicals Inc.
    Inventors: Yasuto Iwai, Masayoshi Okabe, Naotoshi Seki, Atsuhiko Hiai, Seiya Iguchi