Patents Assigned to Enprotec International Group N.V.
  • Oil re-refining method and apparatus
    Patent number: 5814207
    Abstract: A method and apparatus for re-refining used oil, in which the used oil is processed in at least one cyclonic vacuum evaporator comprising a void evaporation chamber (4) into which feedstock is tangentially injected, and in which a fraction of the feedstock is condensed in a spray condenser (7) communicating with the evaporation chamber (4).
    Type: Grant
    Filed: June 7, 1996
    Date of Patent: September 29, 1998
    Assignee: Enprotec International Group N.V.
    Inventor: Kalevi John Kenton