Patents Assigned to Advanced Refinery Technology
  • Degradation of polychlorinated biphenyls
    Patent number: 4931167
    Abstract: Polychlorinated biphenyls are chemically degraded by contact with a Lewis acid catalyst in a non-aqueous liquid medium, in the presence of a cation which combines with the chlorines on the PCBs to form a solid chloride of the cation which will precipitate out from the liquid medium. Preferred Lewis acids are metal halides, particularly a combination of aluminum chloride and ferric chloride, and the preferred cation is potassium in the form of potassium hydroxide. The process is susceptible to both batch and continuous operation.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: June 5, 1990
    Assignee: Advanced Refinery Technology
    Inventor: Carl M. Wilwerding