Recovery of polyamides from composite articles

Details Recovery of polyamides from composite articles Recovery of polyamides from composite articles

1996-06-26

1998-12-15

Seidleck, James J.

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

Synthetic resins

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

521 49, 521 495, 521 40, 528492, 528493, C08J 1104

Patent

active

058498044

ABSTRACT:
A process for recovering polyamide from composite articles that contain polyamide involves (a) subjecting at substantially nondepolymerizing conditions the composite article to a solvent for polyamide for a time sufficient to dissolve substantially all of the polyamide and leaving an insoluble fraction; (b) separating insoluble fraction of the composite article from the dissolved polyamide; and (c) precipitating the dissolved polyamide with appropriate precipitants.

REFERENCES:
patent: 2742440 (1956-04-01), Stott et al.
patent: 2958677 (1960-11-01), Kleinschmidt
patent: 3696058 (1972-10-01), Teti
patent: 5169870 (1992-12-01), Corbin et al.
patent: 5241066 (1993-08-01), Davis et al.
patent: 5430068 (1995-07-01), Subramanian

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