Patents by Inventor Setsuo Matsunaga

Setsuo Matsunaga 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 of separating diacetoxybutene
    Patent number: 4057472
    Abstract: A fractional distillation method of separating diacetoxybutene isomers from a reaction mixture produced from the reaction of butadiene, acetic acid and molecular oxygen comprises employing a series of at least two distillation towers, one of said towers being used for distillation of water and acetic acid under a pressure of 30 - 250 Torr and a tower bottom temperature of 190.degree. - 120.degree. C and the other being used for separation of high boiling point materials under a pressure of 2 - 100 Torr and a tower bottom temperature of 190.degree. - 120.degree. C, the temperature of all tower bottoms being from 190.degree. - 120.degree. C.
    Type: Grant
    Filed: February 6, 1976
    Date of Patent: November 8, 1977
    Assignees: Noboru Haji, Mitsubishi Chemical Industries Ltd.
    Inventors: Jun Toriya, Masato Sato, Ken Shiraga, Setsuo Matsunaga