Method for extracting nylon from waste materials

Details Method for extracting nylon from waste materials Method for extracting nylon from waste materials

2001-05-10

2010-02-09

Yoon, Tae H (Department: 1796)

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

Synthetic resins

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

C528S495000

Reexamination Certificate

active

07659320

ABSTRACT:
The invention relates to a method for recovering nylon from a nylon-containing material by contacting the nylon-containing material with an alkanol-containing solvent at elevated temperature and at a pressure higher than the equilibrium pressure of the alkanol-containing solvent at the elevated temperature, thereby dissolving the nylon in the alkanol-containing solvent, removing the alkanol-containing solvent containing dissolved nylon from any undissolved solids, and decreasing the temperature of the alkanol-containing solvent containing dissolved nylon to precipitate the dissolved nylon.

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Mihut, C. et al., “Review: Recycling of Nylon From Carpet Waste,”Polymer Engineering and Science,vol. 41, No. 9, Sep. 2001, pp. 1457-1470.

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