Method For The Depolymerization Of Polycaprolactam Processing Waste To Form Caprolactam

A continuous method for depolymerizing polycaprolactam waste into caprolactam is described. In the method, a melt of the polycaprolactam waste and an inert gas are fed to a reactor in a continuous manner. Water and an aromatic hydrocarbon are also fed to the reactor and the polycaprolactam waste is...

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Hauptverfasser: DE HAAN, Andre Banier, DE GROOT, Michael Josef, Olijve, Luuk Lambertus Christina
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creator DE HAAN, Andre Banier
DE GROOT, Michael Josef
Olijve, Luuk Lambertus Christina
description A continuous method for depolymerizing polycaprolactam waste into caprolactam is described. In the method, a melt of the polycaprolactam waste and an inert gas are fed to a reactor in a continuous manner. Water and an aromatic hydrocarbon are also fed to the reactor and the polycaprolactam waste is contacted with superheated steam of the water/hydrocarbon mixture at a temperature of between 260° C. and 300° C. and at a gauge pressure from 1 barg to 70 barg. Turbulent mixing conditions are created in the reactor, and a caprolactam-containing vapor stream is created in the reactor which exits the reactor at an outlet. The caprolactam is separated from the exited caprolactam-containing vapor stream by partial condensation, and collected. A reactor system for carrying out the method is also described.
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subjects AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
title Method For The Depolymerization Of Polycaprolactam Processing Waste To Form Caprolactam
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