Recovery of oil from oily sludges

Details Recovery of oil from oily sludges Recovery of oil from oily sludges

1982-03-08

1983-05-17

Hart, Charles N.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210732, 210737, B01D 1704

Patent

active

043839274

ABSTRACT:
A process is provided for enhancing oil recovery from an oily sludge containing a solid phase, an oil phase and a water phase by adding a positively charged latex flocculant to such sludge and immediately thereafter adding a chemical emulsion breaker which is negatively charged or nonionic, while controlling the proportions of said flocculant and said emulsion breaker to cause the entrapped oil phase to detach from the floc surface of the adsorptive solids and go into the water phase, and mechanically separating the oil from the solids and water.

REFERENCES:
patent: 3493501 (1970-02-01), Eck
patent: 4138446 (1979-02-01), Kawakami et al.
patent: 4179369 (1979-12-01), Bradley et al.

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