Patents by Inventor Yakayuki Kobayashi

Yakayuki Kobayashi 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 and apparatus for preparing high-concentration alkali
    Patent number: 4830707
    Abstract: A caustic alkali solution is concentrated to high density or high caustic alkali concentration by evaporation under high pressure at elevated temperature and expansion of the thus obtained concentrated caustic alkali solution to low pressure, preferably below atmospheric pressure. The pressure difference between the high pressure evaporator and the low pressure expansion vessel is absorbed gradually by a pressure difference absorber, preferably comprising a liquid column in a U-shaped siphon tube, so that corrosion and erosion are reduced considerably.
    Type: Grant
    Filed: May 27, 1986
    Date of Patent: May 16, 1989
    Assignees: Sulzer-Escher Wyss AG, Ube Industries, Ltd.
    Inventors: Robert Winkler, Siro Sala, Yakayuki Kobayashi, Shinjiro Yokota