Patents by Inventor Masami Ayano

Masami Ayano 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).

  • Waste water treatment in the production of methacrylic acid
    Patent number: 4618709
    Abstract: A process for separation of methacrylic acid from a methacrylic acid-containing, gaseous reaction mixture obtained by subjecting methacrolein or a compound which can afford methacrolein under reaction conditions and molecular oxygen to gas phase reaction in the presence of a catalyst for oxidation under the coexistence of an inert gas for dilution which comprises (a) cooling the gaseous reaction mixture from a reactor wherein the gas phase reaction has been effected to separate into condensable components including methacrylic acid, acetic acid and water vapor as a condensed liquor and non-condensable components including methacrolein as a non-condensed gaseous mixture, (b) eliminating contaminating methacrolein from the condensed liquor and (c) contacting the resulting condensed liquor with an organic solvent to extract methacrylic acid, followed by separation into an organic solvent solution including methacrylic acid and an aqueous solution as waste water, characterized in that (1) the inert gas for diluti
    Type: Grant
    Filed: January 30, 1981
    Date of Patent: October 21, 1986
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masao Sada, Michio Kato, Masami Ayano, Tadashi Abe, Masanori Moriwaki
  • Purification of crude acrylic acid
    Patent number: 4199410
    Abstract: A process for purifying crude acrylic acid characterized in that high-purity purified acrylic acid containing little or no low boiling aldehydes is obtained by rectifying a crude acrylic acid consisting essentially of acrylic acid and containing low boiling substances such as acetaldehyde, acrolein, water and acetic acid and/or high boiling substances such as maleic acid, phenol, benzaldehyde and acrylic acid dimer, thereby removing said low boiling substances and then high boiling ones, and then stripping trace amounts of remaining low boiling aldehydes with an inert gas such as nitrogen or air at a liquid to gas molar ratio of 2 to 20.
    Type: Grant
    Filed: July 31, 1978
    Date of Patent: April 22, 1980
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tetsuya Ohrui, Michio Kato, Masami Ayano, Tsunejiro Kawaguchi, Tadashi Abe
  • Extraction of acrylic acid and/or methacrylic acid with a solvent mixture of methylethylketone and xylene or ethylbenzene
    Patent number: 3968153
    Abstract: A method for extraction of acrylic acid and/or methacrylic acid from a solution containing the same by treating the said solution with an organic solvent, which is characterized by using a mixture of methylethylketone and a xylene as the organic solvent. By such method, the extraction of acrylic acid and/or methacrylic acid is accomplished efficiently and economically.
    Type: Grant
    Filed: May 10, 1973
    Date of Patent: July 6, 1976
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Tetsuya Ohrui, Yasuhito Sakakibara, Yukinaga Aono, Michio Kato, Hiroshi Takao, Masami Ayano