Patents by Inventor Toshihiko Sumino

Toshihiko Sumino 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).

  • Oxidizing an organic compound
    Patent number: 4632782
    Abstract: A process for oxidizing an organic compound by ceric sulfate dissolved in an aqueous sulfuric acid solution, wherein the organic compound is oxidized (1) by means of a ceric sulfate-aqueous sulfuric acid solution or a cerous sulfate-containing ceric sulfate-aqueous sulfuric acid solution in which the molar concentration (mol/liter) of ceric sulfate is at least the molar concentration of cerium (ions) contained in the molecules of cerous sulfate at the maximum solubility of cerous sulfate in an aqueous sulfuric acid solution at the final sulfuric acid concentration (exclusive of ceric sulfate and cerous sulfate) and at the temperature under the oxidation reaction conditions and at most the saturated molar concentration of ceric sulfate in said aqueous sulfuric acid solution, (2) under a condition such that at the end of the oxidation reaction, the concentration of ceric sulfate is maintained at a level capable of dissolving cerous sulfate which is present at a concentration of at least the maximum solubility o
    Type: Grant
    Filed: April 25, 1984
    Date of Patent: December 30, 1986
    Assignee: Kawasaki Kasei Chemicals Limited
    Inventors: Tatsuyoshi Komatsu, Shigeaki Numata, Katsuhiko Hioki, Toshihiko Sumino
  • Process for the preparation of quinones
    Patent number: 4536337
    Abstract: A process for preparing a quinone, which comprises reacting a polynuclear aromatic hydrocarbon and a ceric salt in an aqueous acid solution in the presence of an organic solvent selected from the group consisting of chlorobenzene and an alkylbenzene represented by the general formula: ##STR1## where each of R.sub.1, R.sub.2 and R.sub.3 is an alkyl group and the total carbon number of the alkyl groups is from 3 to 6.
    Type: Grant
    Filed: April 4, 1984
    Date of Patent: August 20, 1985
    Assignee: Kawasaki Kasei Chemicals Ltd.
    Inventors: Tatsuyoshi Komatsu, Shigeaki Numata, Toshihiko Sumino, Katsumi Matsuzaki, Masao Narita, Katsuhiko Hioki
  • Method for electrolyzing cerous sulfate
    Patent number: 4530745
    Abstract: A method for electrolyzing cerous sulfate in the electrolytic oxidation of cerous sulfate to ceric sulfate in an aqueous sulfuric acid solution, characterized in that the concentration of the cerous sulfate in the electrolyte to be supplied to the electrolytic cell is maintained, by the presence of ceric sulfate, at a level of at least the saturated concentration of cerous sulfate in the aqueous sulfuric acid solution (exclusive of the cerous sulfate and ceric sulfate) at the initial sulfuric acid concentration and at the temperature of electrolysis, and at most the saturated concentration of cerous sulfate in the presence of the ceric sulfate in the aqueous sulfuric acid solution at the initial sulfuric acid concentration and at the temperature of electrolysis, and the concentration of the ceric sulfate in the electrolyte is maintained at a level of at most the saturated concentration of ceric sulfate in the aqueous sulfuric acid solution at the initial sulfuric acid concentration and at the temperature of e
    Type: Grant
    Filed: June 13, 1984
    Date of Patent: July 23, 1985
    Assignee: Kawasaki Kasei Chemicals Ltd.
    Inventors: Tatsuyoshi Komatsu, Shigeaki Numata, Katsuhiko Hioki, Toshihiko Sumino