Method and apparatus for treatment of oil contaminated sludge

Details Method and apparatus for treatment of oil contaminated sludge Method and apparatus for treatment of oil contaminated sludge

1987-02-10

1989-03-14

Davis, Curtis R.

Mineral oils: processes and products

Treatment of refining sludge

208424, 208425, 208428, 210708, 210712, 210729, 210787, 210804, 585240, C10G 1700

Patent

active

048122254

ABSTRACT:
Oil containing sludges are treated for the recovery of oil therefrom to render the resultant sludge disposable, by a process of conditioning the sludge to destabilize the emulsified phase thereof, centrifuging the destabilized sludge to obtain a solids-rich material which is largely hydrocarbon free and disposable, and a supernatant, hydrocarbon-containing liquid, and then subjecting the supernatant so formed to liquid/liquid phase separation. The conditioning is conducted so as to prepare a conditioned sludge characterized by a solids content of less than 50% by weight, a water content of less than 90% by weight, an oil phase with an API gravity of less than 12.degree., a continuous aqueous phase, and the solids in the sludge being primarily water wetted, this conditioned sludge being ready for centrifugation.

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