Process for recovering and recycling polyamide from carpet waste

Details Process for recovering and recycling polyamide from carpet waste Process for recovering and recycling polyamide from carpet waste

1996-08-22

1998-11-24

Jagannathan, Vasu

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

Synthetic resins

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

521 495, 521 498, 528481, 528495, 528499, C08J 1104

Patent

active

058407731

ABSTRACT:
The present invention relates to a process for treating polyamide-containing carpet waste by extracting the polyamide from the carpet waste with an extraction agent containing an aliphatic alcohol. The separated polyamide can then be recovered from the extract and recycled for further use. In addition, carpet waste containing two polyamides can be treated in accordance with the present invention so as to separately recover each polyamide. The process according to the present invention provides a high yield of the polyamide. The presence of other constituents normally present in carpets does not interfere with the separating and recycling of the polyamide.

REFERENCES:
patent: 2742440 (1956-04-01), Scott et al.
patent: 3696058 (1972-10-01), Teti
patent: 4146704 (1979-03-01), Seki
patent: 5280105 (1994-01-01), Moran, Jr.
patent: 5430068 (1995-07-01), Subramanian
37-Plastics Fabr., Uses, Chemical Abstract No. 90675, vol. 88, No. 14, Apr. 3, 1978, pp.45-46.

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