Separation of plastic components for recycling thereof

Details Separation of plastic components for recycling thereof Separation of plastic components for recycling thereof

1996-05-28

1997-04-01

Morgan, Kriellion S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

521 41, C08K 332

Patent

active

056166419

ABSTRACT:
An improved floatation separation process wherein the improvement comprises dissolving in a floatation bath sufficient alkali metal salt or alkaline earth metal salt of a phosphate, a pyrophosphate, a metaphosphate or a polyphosphate to provide a concentration greater than 1.0 grams per cubic centimeter and generally about 1.05 to about 1.6. g/cc. A particular salt is sodium dihydrogen phosphate. Preferably, the floatation process is employed to separate physical mixtures of plastic parts.

REFERENCES:
patent: 4532290 (1985-07-01), Jaquiss et al.
patent: 4904516 (1990-02-01), Creamer

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