Classifying – separating – and assorting solids – Precedent preparation of items or materials to facilitate... – Sorting special items or sorting by methods and apparatus...
Patent
1987-09-30
1989-05-16
Schor, Kenneth M.
Classifying, separating, and assorting solids
Precedent preparation of items or materials to facilitate...
Sorting special items or sorting by methods and apparatus...
209 17, 209173, 2091725, 241 24, 241DIG38, B03B 528, B03B 544
Patent
active
048301884
ABSTRACT:
Plastics fragments including polyethylene terephthalate and polyolefins derived from comminution of containers such as beverage bottles are segregated according to specific gravity by flotation. The flotation liquid includes a surfactant to facilitate complete separation of the light and heavy plastic fractions from one another. The surfactant may be a residue of a detergent used to wash the flakes and remove contaminants therefrom. Rinsing prior to flotation separation is controlled so as to leave the desired detergent residue leading to a marked reduction in rinse water requirements.
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Fernandes Jose R.
Hannigan Benjamin R.
Lithgow Thomas M.
Rutgers The State University
Schor Kenneth M.
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