Patents by Inventor Kiyoharu Urakawa

Kiyoharu Urakawa 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 preparing 2-(1-hydroxyalkyl) cyclohexanone and/or 2-alkylidene cyclohexanone
    Patent number: 4668827
    Abstract: The present invention relates to a process for preparing a 2-(1-hydroxyalkyl)cyclohexanone and/or a 2-alkylidene cyclohexanone. According to the present invention, the reaction of cyclohexanone with an aliphatic aldehyde is conducted in a heterogeneous system of an oil-in-water emulsion, whereby it is possible to obtain the 2-(1-hydroxyalkyl)cyclohexanone and/or the 2-alkylidene cyclohexanone in high selectivity.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: May 26, 1987
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Mitsuhiko Tamura, Haruo Katsumata, Kiyoharu Urakawa, Yoshiaki Ohtani
  • Process for producing high purity methoxyanthraquinones
    Patent number: 4080370
    Abstract: Methoxyanthraquinones are produced from the corresponding nitroanthraquinones by reacting a nitroanthraquinone with methanol and an alkali in a reaction medium chiefly comprising methanol at a temperature of 50.degree.-130.degree. C under atmospheric or superatmospheric pressure in the presence of molecular oxygen wherein the dissolved oxygen concentration of the reaction medium is maintained at a value of at least 1 ppm.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: March 21, 1978
    Assignee: Mitsubishi Chemical Industries, Ltd.
    Inventors: Yoshio Kimura, Yasuhito Goto, Kenzo Ban, Kiyotomi Kosai, Haruki Uchida, Kiyoharu Urakawa