Method of filtering oil from liquids

Details Method of filtering oil from liquids Method of filtering oil from liquids

1975-10-22

1976-11-16

Hart, Charles N.

Liquid purification or separation

With alarm, indicator, register, recorder, signal or...

Responsive to fluid flow

210 80, 210DIG5, 210 82, B01D 2324

Patent

active

039922910

ABSTRACT:
This disclosure relates to a method for filtering suspended oil contaminants from an aqueous-based liquid. The method includes flowing the contaminated liquid through a bed of granulated black walnut shells which have a relatively weak affinity for oil. The suspended oil is coalesced during flow through the filter bed to form globular oil particles that are large enough to become entrapped in the interstices of the filter bed. After a substantial quantity of oil has been accumulated in the filter bed, the bed is rejuvenated by flowing backwash liquid therethrough to provide a high velocity scrubbing to free at least a portion of the accumulated oil from the bed, the shells' weak affinity for oil facilitating such rejuvenation. Next, the bed is reformed and a subsequent filtration cycle is initiated.

REFERENCES:
patent: 2733138 (1956-01-01), Clark
patent: 3478873 (1969-11-01), McLean
patent: 3478874 (1969-11-01), McLean et al.
patent: 3550774 (1970-12-01), Hirs et al.
patent: 3562153 (1971-02-01), Tully et al.
patent: 3574096 (1971-04-01), Carlstedt
patent: 3574329 (1971-04-01), Beavon
patent: 3752762 (1973-08-01), Cincotta
patent: 3780861 (1973-12-01), Hirs
patent: 3853753 (1974-12-01), Jones

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