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US 5,855,768 AGranted
Process for removing contaminants from thermally cracked waste oils
AssigneeNatural Resources Canada
InventorsMaria Stanciulescu, Michio Ikura
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Abstract
A process is described for removing contaminants from thermally cracked waste oil, e.g. used motor oil. In the process the cracked waste oil is contacted with a solvent comprising methanol. The thermally cracked waste oil is then separated from the solvent whereby a substantial portion of the contaminants are removed into the solvent. Thereafter, the solvent is separated from the contaminants and recycled.
Claims4
A process for removing contaminants from thermally cracked used motor oil comprising:
- (a) intimately contacting a stream of thermally cracked used motor oil with a solvent comprising methanol which is substantially free from water, the thermally cracked used motor oil being as-cracked without added diluents or additives;
- (b) separating the thermally cracked used motor oil from the solvent whereby a substantial portion of the contaminants are removed to the solvent;
- (c) separating the solvent from the contaminants;
- and
- (d) recycling the solvent.
2 more elements
Dependencies are inferred from the claim text.