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Oil re-refining method and apparatus

  • US 5,814,207 A
  • Filed: 06/07/1996
  • Issued: 09/29/1998
  • Est. Priority Date: 06/08/1995
  • Status: Expired
First Claim
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1. A method of re-refining used oil wherein the used oil is processed in at least one cyclonic vacuum evaporator comprising a substantially void evaporation chamber into which feedstock is substantially tangentially injected, and wherein a fraction of the feedstock is condensed in a spray condenser communicating with the evaporation chamber.

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