WASTE OIL REPROCESSING

A laboratory program was conducted on the reprocessing of waste oil. The program consisted of combustion trails, precipitation tests, and distillation experiments. This report contains a discussion of the laboratory procedures and the results obtained. The combustion trails involved the direct burning of waste oil in a small boiler to assess the problems due to the contaminants. The results showed severe fouling of the heat exchange tubes with 50% of the inorganic ash collecting inside the boiler; the remainder was emitted in the flue gas. The bulk of the particulates were in the submicron range with high levels of lead. Sludge precipitation was used to remove metallics from the waste oil. A precipitating solvent consisting on n-hexane and n-proply alcohol lowered the inorganic levels by 70-97% depending on the source of the oil. The presence of water inhibited proper separation and was removed. More than 87% of the lead plus most of the barium, calcium and iron were removed by precipitation. While the levels of zinc, phosphorus, and sulfur were lowered, the decrease was not as great as with the aforementioned. Trace metal analyses showed that cooper, not as great as with the aforementioned. Trace metal analyses showed that cooper, aluminum, chromium, magnesium and tin were effectively removed but that silicon vandium and sodium were not. The distillation experiments were conducted at 20 Torr pressure using one waste oil. The results demonstrated improved metals removal over the precipitation technique without the attendant problem of solvent recovery. However, to look at the total problem the disposal of the ash containing residues had to be considered. The distillation residue contained oily materials which created disposal problems, whereas the precipitated sludge could, in principle, be stripped clean of oils, thus lessening the disposal problem.

  • Supplemental Notes:
    • This report was prepared for the Division of Water Pollution Control, Water Resources Commission of the Commonwealth of Massachusetts.
  • Corporate Authors:

    Exxon Research and Engineering Company

    Government Research Laboratory, P.O. Box 8
    Linden, NJ  United States  07036
  • Authors:
    • Chappell, G A
  • Publication Date: 1973-1

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 40 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00097707
  • Record Type: Publication
  • Report/Paper Numbers: Project No. 72-5 Final Rpt.
  • Files: TRIS
  • Created Date: Aug 13 1975 12:00AM