Mineral oils: processes and products – Refining – Purifying used oil
Reexamination Certificate
2006-12-19
2006-12-19
Caldarola, Glenn (Department: 1764)
Mineral oils: processes and products
Refining
Purifying used oil
C208S187000
Reexamination Certificate
active
07150822
ABSTRACT:
A process for heating thermally unstable or difficult to heat liquid feeds, e.g., used lubricating oil (ULO) to dehydrate and/or recover distillable components therefrom, is disclosed. The liquid feed is heated by direct contact heat exchange with molten metal, preferably maintained as a bath, operating at a temperature above the boiling point of water and below 600 C. The liquid feed is heated and typically at least partially vaporized in, or above, or by contact with the molten metal to produce a heated liquid. When ULO contaminated with water is the feed, the vapor product of the process will comprise water vapor and/or distillable hydrocarbons. ULO additive decomposition products, such as carbon, may be removed as a solid, semi-solid or liquid residual phase from contact with the molten metal.
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English translation of JP 59-124991A, Jul. 19, 1984.
DTX Technologies LLC
Singh Prem C.
Stone Richard D.
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