Process for recovering polymers from commingled materials

Details Process for recovering polymers from commingled materials Process for recovering polymers from commingled materials

1997-06-04

1999-11-30

Mitchl, Paul R.

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

Synthetic resins

Process of treating scrap or waste product containing solid...

521 47, C08J 1104

Patent

active

059944170

ABSTRACT:
A process for recovering polymers from commingled materials is disclosed. In general, the process includes first contacting the commingled materials with a solvent which selectively dissolves the polymer to form a solvent and polymer solution. The solvent and polymer solution is then contacted with an anti-solvent into which the solvent is soluble but into which the polymer is insoluble. When the solvent and polymer solution is contacted with the anti-solvent, the anti-solvent causes the polymer to nucleate and precipitate from the solution. In one embodiment, it has been found that the process of the present invention is particularly well adapted to recovering nylon from commingled materials such as carpet waste.

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