Reclaiming .epsilon.-caprolactam from nylon 6 carpet

Details Reclaiming .epsilon.-caprolactam from nylon 6 carpet Reclaiming .epsilon.-caprolactam from nylon 6 carpet

1991-06-21

1992-12-08

Michl, Paul R.

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

Synthetic resins

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

521 405, C08J 1114, C08J 1116

Patent

active

051698706

ABSTRACT:
A process for the continuous recovery of .epsilon.-caprolactam provides a carpet made from nylon 6 fibers and having a backing to a separator to prepare scrap containing nylon 6 and waste. The scrap from the separator is fed to a depolymerizing reactor where the scrap is subjected to a depolymerization catalyst, temperatures of at least the melting point of nylon 6 and superheated steam to produce an .epsilon.-caprolactam containing distillate and more waste. The .epsilon.-caprolactam in the distillate is separated from other volatiles therein; and purified.

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Dmitrieva et al., "Regeneration of .epsilon.-Caprolactam from Wastes . . . ," Translated from Khimicheskie Volokna, 17(4), Jul.-Aug. 1985, pp. 5-12.
L. A. Dmitrieva et al., "Regeneration of .epsilon.-caprolactam from Wastes in the Manufacture of Polycaproamide Fibres and Yarns", Fibre Chemistry, Mar. 1986, pp. 229-241.

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