Classifying – separating – and assorting solids – Precedent preparation of items or materials to facilitate... – Sorting special items or sorting by methods and apparatus...
Patent
1992-09-22
1993-09-21
Olszewski, Robert P.
Classifying, separating, and assorting solids
Precedent preparation of items or materials to facilitate...
Sorting special items or sorting by methods and apparatus...
209 11, 209 13, 209211, 209450, 209166, 209172, 209173, B03B 102, B03B 104
Patent
active
052461165
ABSTRACT:
A method for the separation and recovery of foils, in particular aluminum foils, and the other components in waste foil-containing laminates includes subjecting the waste laminates to agitation in a heated polyalkylene glycol polymer solution. The thus heated mixture is cooled to permit density variations to separate the plastic and paper components of the waste laminate from the foil components therein. The separated foil components can be recovered from the polyalkylene glycol polymer solution for recycle or other use. Using a polyalkylene glycol polymer solution permits recovery of the glycol polymer in a heated recovery tank to recycle the polymer to facilitate further foil separation while minimizing adverse effects on the environment.
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McDonald Alan T.
Olszewski Robert P.
Reichard Dean A.
Reynolds Metals Company
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