Process and apparatus for re-refining used petroleum products

Details Process and apparatus for re-refining used petroleum products Process and apparatus for re-refining used petroleum products

C - Chemistry, Metallurgy

10

G

196/205

C10G 51/00 (2006.01) C10M 175/00 (2006.01)

Patent

CA 1067439

IMPROVED PROCESS AND APPARATUS FOR RE-REFINING USED PETROLEUM PRODUCTS Abstract of the Disclosure Used petroleum products, such as crankcase oils, are reclaimed by an initial treatment step consisting of flash vaporization with continuous recirculation of a substantial portion of the unvaporized liquid. At atmospheric pressure and 210 - 240° F, water comprises substantially all of the overhead product and this may be vented to the atmosphere. The unva- porized liquid product is mechanically filtered through a vibratory filter and then successive cannister filters to pro- duce a product which may be used as a fuel oil or further re- fined into various fuel and/or lubricant products in successive flash distillation stages. In the preferred embodiment, three such stages are operated, respectively, at 300 - 400° F and 24 - 28 inches mercury, 600 - 650 ° F, and 7 torr, and 630 - 680° F and 1-1/2 - 3 torr.

235554

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