解聚
己内酰胺
聚酰胺
热解
磷酸
催化作用
化学
单体
高分子化学
有机化学
化学工程
材料科学
聚合物
工程类
作者
Henning Bockhorn,Susanne Donner,M. Gernsbeck,Andreas Hornung,Ursel Hornung
标识
DOI:10.1016/s0165-2370(00)00187-x
摘要
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.
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