Recovery of oil from refinery sludges by steam distillation

Details Recovery of oil from refinery sludges by steam distillation Recovery of oil from refinery sludges by steam distillation

1975-04-14

1977-03-29

Levine, Herbert

Mineral oils: processes and products

Treatment of refining sludge

208188, C10G 3108

Patent

active

040147800

ABSTRACT:
A process for deoiling and dewatering refinery sludges in which sludges, optionally mixed with a diluent oil such as recycle oil recovered in the process, are contacted in a heating zone with steam or superheated steam to effect separation of the sludges into dry, oil-free, free-flowing solids and an oil-water vapor phase which on condensation yields a mixture of oil and water. The oil recovered from this mixture is suitable for a variety of purposes such as for cracking stock, etc. and the water recovered exhibits a reduced Chemical Oxygen Demand. The dry, free flowing solids recovered from the heating zone are useful for a wide variety of applications, such as for land fill.

REFERENCES:
patent: 1709230 (1929-04-01), Potter et al.
patent: 1878933 (1932-09-01), Lawton
patent: 3692668 (1972-09-01), McCoy et al.
patent: 3696021 (1972-10-01), Cole et al.
patent: 3716474 (1973-02-01), Hess et al.

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