Patents by Inventor Shyuzo Nakamura

Shyuzo Nakamura 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 for selective dealkylation of 1,4-dialkylbenzene
    Patent number: 4499321
    Abstract: A method for selective dealkylation of 1,4-dialkylbenzene comprising selectively dealkylating a 1,4-dialkylbenzene in a dialkylbenzene mixture using as a catalyst crystalline zeolite having a silica/alumina ratio of at least 12 and a constrained index of 1 to 12 which is modified with an oxide of a metal or mettaloid, said crystalline zeolite being one ion-exchanged with a lithium ion.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: February 12, 1985
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Hiroshi Sato, Norio Ishii, Shyuzo Nakamura