Extraction method and apparatus

Details Extraction method and apparatus Extraction method and apparatus

1991-12-23

1992-08-11

Hart, Charles

Gas separation

Means within gas stream for conducting concentrate to collector

55178, 55440, B01D 4700

Patent

active

051375516

ABSTRACT:
A method and apparatus for separating surfactant depleted liquid from an at least partially stable foamed aqueous admixture of water, surfactant and air includes introducing the at least partially stable foamed admixture to a channel of preselected height, length, width and inclination at such a flow rate as the foamed admixture passes through the channel. A substantially translational motion of the foamed admixture is maintained through the bulk of the channel. As the foamed admixture translates through the channel, surfactant depleted liquid drains from the interstices thereof. The air content of the foamed admixture does not increase above the air content at which substantial overdrying begins to occur in the foamed admixture. Tranquil interface flow conditions are maintained in the flow of surfactant depleted liquid drained from the foamed admixture for so long as it is in contact with the admixture. Separation of the surfactant depleted liquid from the foamed admixture is carried out by the method and apparatus of the present invention.

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