Patents Examined by Nadine Preish
  • Olefin color stabilization
    Patent number: 5986153
    Abstract: A process for substantially stabilizing the color of a fluid which comprises an olefin is disclosed. The process comprises contacting the fluid with a composition, which comprises aluminum, zirconium and a borate, under a condition effective to stabilize the color of the fluid.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: November 16, 1999
    Assignee: Phillips Petroleum Company
    Inventors: Lyle R. Kallenbach, Jeffrey W. Freeman