Patents by Inventor Tatsushi Saeki

Tatsushi Saeki 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).

  • Purification of formaldehyde by separation
    Patent number: 4285811
    Abstract: A mixture containing formaldehyde and water is separated effectively by contacting with adsorbents of specific type A zeolites containing exchanged cations of the elements from Group IA (4) to (6) or Group IIA (6) or mixture thereof of the Periodic Table of Elements.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: August 25, 1981
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Tetsuya Miyake, Kunihiko Takeda, Naoki Miyata, Tatsushi Saeki, Maomi Seko
  • Process for recovering heavy metal ions or heavy metal ions and halogen values from solutions comprising a lower aliphatic monocarboxylic acid
    Patent number: 4238294
    Abstract: A process for recovering heavy metal ions or heavy metal ions and halogen values from a solution comprising a lower aliphatic monocarboxylic acid, which comprises the steps of:(1) contacting a lower aliphatic carboxylic acid solution containing heavy metal ions or heavy metal ions and halogen values with an anion exchange resin, at least 60% of the ion-exchange groups of said anion exchange resin being in the bromide or chloride state, while the water concentration in the lower aliphatic monocarboxylic acid solution has been adjusted to a level lower than 20% by weight, thereby to adsorb the heavy metal ions or the heavy metal ions and the halogen values on the anion exchange resin; and(2) desorbing the adsorbed heavy metal ions or the adsorbed heavy metal ions and the adsorbed halogen values from the anion exchange resin by elution with an eluent.
    Type: Grant
    Filed: July 28, 1978
    Date of Patent: December 9, 1980
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hiroshi Takeuchi, Tetsuya Miyake, Masatoshi Tanouchi, Tatsushi Saeki, Kazuki Ban
  • Process for separation of hydrocarbon mixture
    Patent number: 4159284
    Abstract: A hydrocarbon mixture is fed to a system of adsorbents in a plug flow so as to form at least one displacement boundary in the system to accumulate the composition in the vicinity of the boundary. The process is simple to operate and suitable for separation of a hydrocarbon mixture containing components with similar physical and chemical properties such as a mixture of hydrocarbon isomers.
    Type: Grant
    Filed: January 12, 1978
    Date of Patent: June 26, 1979
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Maomi Seko, Tetsuya Miyake, Kunihiko Takeda, Tatsushi Saeki
  • Purification of formaldehyde by separation
    Patent number: 4137054
    Abstract: A mixture containing formaldehyde and water is separated effectively by contacting with adsorbents of specific type A zeolites containing exchanged cations of the elements from Group IA (4) to (6) or Group IIA (6) or mixture thereof of the Periodic Table of Elements.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: January 30, 1979
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Tetsuya Miyake, Kunihiko Takeda, Naoki Miyata, Tatsushi Saeki, Maomi Seko