Patents Assigned to Teijin Limied
  • Process for producing alkenylbenzene
    Patent number: 5329058
    Abstract: In a process for producing an alkenylbenzene by the reaction of an alkylbenzene having 8 or more carbon atoms and a conjugated diolefin, the improvement in which the reaction is performed in the presence of a catalyst obtained by dispersing (a) an alkali metal and (b) potassium carbonate and/or potassium hydroxide in the presence of (c) an aromatic hydrocarbon having at least a substituent with a double bond.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: July 12, 1994
    Assignee: Teijin Limied
    Inventors: Keizo Shimada, Koji Sumitani, Seiji Itoh, Kazuhiro Sato