Pyrolysis of polyamide 6 under catalytic conditions and its application to reutilization of carpets

Bockhorn, H., Donner, S., Gernsbeck, M., Hornung, A. and Hornung, U. (2001). Pyrolysis of polyamide 6 under catalytic conditions and its application to reutilization of carpets. Journal of Analytical and Applied Pyrolysis, 58-59 , pp. 79-94.

Abstract

ε-caprolactam is a monomer of high value. Therefore, the chemical reutilization of polyamide 6 containing carpets for ε-caprolactam recovery offers some economic benefit and is performed on a technical scale with the help of the Zimmer-process. By this process polyamide 6 is depolymerized with steam and phosphoric acid. An alternative to this process is the thermal depolymerization - catalyzed or non-catalyzed. To investigate this alternative in more detail, the formal kinetic parameters of (i) the thermal depolymerization of polyamide 6, (ii) the thermal depolymerization in presence of sodium/potassium hydoxide, and (iii) the thermal depolymerization in presence of phosphoric acid are determined in this work. Based on the kinetics of the catalyzed or non-catalyzed depolymerization a stepwise pyrolysis procedure is designed by which the formation of ε-caprolactam from polyamide 6 can be separated from the formation of other pyrolysis products.

Publication DOI: https://doi.org/10.1016/S0165-2370(00)00187-X
Divisions: Engineering & Applied Sciences > Chemical engineering & applied chemistry
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: Copyright 2007 Elsevier B.V., All rights reserved.
Uncontrolled Keywords: polymide 6,nylon 6,thermal degradation,catalysis,stepwise pyrolysis
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2001-04-01
Authors: Bockhorn, H.
Donner, S.
Gernsbeck, M.
Hornung, A.
Hornung, U.

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