Patents by Inventor Kishio Miwa

Kishio Miwa 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).

  • 1-Alkyl-4-isopropylbenzene desorbents for para-xylene
    Patent number: 4139572
    Abstract: Para-xylene is selectively adsorbed from a C.sub.8 aromatic hydrocarbon feed by a crystalline selective adsorbent, and then the para-xylene is subsequently desorbed by contacting the resulting adsorbent with a 1-(lower alkyl)-4-isopropylbenzene desorbent, wherein the lower alkyl group contains one to two carbon atoms. The desorbent effectively desorbs the para-xylene from the adsorbent, and the para-xylene may be produced as an enriched product.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: February 13, 1979
    Assignee: Toray Industries, Inc.
    Inventors: Kishio Miwa, Takehisa Inoue, Kazuo Tsunoi
  • Adsorption-desorption pressure swing gas separation
    Patent number: 4070164
    Abstract: Pressure swing selective adsorption-desorption process and apparatus for separating at least one gaseous component from a gas mixture.After selective adsorption from the gas mixture, the subsequent desorption procedure comprises two separate steps which are carried out under different pressures. The desorbed gases obtained by the two separate desorption steps are then combined.
    Type: Grant
    Filed: July 13, 1976
    Date of Patent: January 24, 1978
    Assignee: Toray Industries, Inc.
    Inventors: Kishio Miwa, Kazuo Tsunoi, Yoshio Noguchi