Patents by Inventor Takashige Miyanari

Takashige Miyanari 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 producing esters
    Patent number: 6849759
    Abstract: A process for producing an ester comprising reacting a carboxylic acid and ethylene in the presence of an acid catalyst in a vapor phase, wherein the concentration of olefin having 3 or more carbon atoms in the starting materials is controlled to 10,000 ppm or less in terms of the molar ratio to the total of the olefin and ethylene. The deterioration of the catalyst can be remarkably prevented from proceeding and a continuous and stable operation can be performed for a long time.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: February 1, 2005
    Assignee: Showa Denko K.K.
    Inventors: Hiroshi Uchida, Tomoyoshi Higashi, Etsuko Kadowaki, Takashige Miyanari, Wataru Oguchi
  • Process for purifying acetic acid
    Patent number: 5662780
    Abstract: A process for purifying acetic acid which comprises: introducing a feedstock aqueous solution of acetic acid having an acetic acid concentration of from 10 to 50% by weight into an extractor; supplying an extracting medium containing isopropyl acetate in an amount from 0.6 to 3.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: September 2, 1997
    Assignee: Showa Denko K.K.
    Inventors: Takaharu Sasaki, Masayuki Fujimoto, Takashige Miyanari, Hiroshi Nishino