Patents Assigned to Neste Alfa Oy
  • Method for removing catalyst from an oligomer product
    Patent number: 5767334
    Abstract: A method for removing catalyst from an olefinic oligomerization product includes the steps of oligomerizing one or more olefins in the presence of a BF.sub.3 cocatalyst complex, and distilling the oligomerization product while separating vaporized BF.sub.3 cocatalyst complex, the distillation step including, simultaneously to the separation of BF.sub.3 cocatalyst complex, a separation of vaporized unreacted monomer from a bottom product which becomes substantially free from BF.sub.3 cocatalyst complex.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: June 16, 1998
    Assignee: Neste Alfa Oy
    Inventors: Fredrik Nissfolk, Raimo Linnaila, Ivo Smeets, Vesa-Matti Lehtinen, Kauno Alastalo, Filip Thierie