Method for separating plastics-containing mixture

Details Method for separating plastics-containing mixture Method for separating plastics-containing mixture

1975-03-25

1976-10-12

Hart, Charles N.

Liquid purification or separation

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

Responsive to fluid flow

209166, 241 15, B03D 100

Patent

active

039856500

ABSTRACT:
A method for separating a plastics-containing mixture comprising a lead alloy, a polyolefin, a polystyrene and ebonite, which comprises (1) separating the lead alloy from the mixture in a running liquid, with the lead alloy being recovered as a residue; (2) placing the resulting plastics mixture comprising the polyolefin, polystyrene and ebonite in a separation cell containing an aqueous liquid medium in the presence of a wetting agent; (3) introducing gas bubbles into the cell thereby to cause the gas bubbles to selectively adhere to the surface of the polyolefin and float the polyolefin, with the polyolefin being recovered as a float; (4) adding a flotation agent into the cell containing the resulting plastics mixture comprising the polystyrene and ebonite; and (5) introducing gas bubbbles into the cell thereby to cause the gas bubbles to selectively adhere to the surface of the polystyrene and float the polystyrene, with the polystyrene being recovered as a float and the ebonite being recovered as a residue.

REFERENCES:
patent: 2378152 (1945-06-01), Nagelvoort
patent: 3074653 (1963-01-01), Schorsch
patent: 3224582 (1965-12-01), Iannicelli
patent: 3284282 (1966-11-01), Immel
patent: 3822015 (1974-07-01), Hsieh et al.
patent: 3841916 (1974-10-01), Marchetti

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