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Title: Purification of caprolactam from recycled nylon

Abstract

A method of removing 1,11-diamino-6-undecanone from the pyrolysis product of nylon comprising: a) pyrolyzing nylon-6 to form a pyrolyzate containing a caprolactam mixture; b) dissolving the caprolactam mixture in a solvent to form a solution; c) passing carbon dioxide gas through the solution to form a precipitate; d) removing the precipitate from the solution; and e) recovering the purified caprolactam from the solution.

Inventors:
 [1]
  1. Lakewood, CO
Issue Date:
Research Org.:
Midwest Research Institute, Kansas City, MO (United States)
OSTI Identifier:
872370
Patent Number(s):
5919927
Assignee:
Midwest Research Institute (Kansas City, MO)
Patent Classifications (CPCs):
C - CHEMISTRY C07 - ORGANIC CHEMISTRY C07D - HETEROCYCLIC COMPOUNDS
C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
DOE Contract Number:  
AC36-83CH10093
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
purification; caprolactam; recycled; nylon; method; removing; 11-diamino-6-undecanone; pyrolysis; product; comprising; pyrolyzing; nylon-6; form; pyrolyzate; containing; mixture; dissolving; solvent; solution; passing; carbon; dioxide; gas; precipitate; recovering; purified; dioxide gas; carbon dioxide; pyrolysis product; oxide gas; /999/

Citation Formats

Moens, Luc. Purification of caprolactam from recycled nylon. United States: N. p., 1999. Web.
Moens, Luc. Purification of caprolactam from recycled nylon. United States.
Moens, Luc. Fri . "Purification of caprolactam from recycled nylon". United States. https://www.osti.gov/servlets/purl/872370.
@article{osti_872370,
title = {Purification of caprolactam from recycled nylon},
author = {Moens, Luc},
abstractNote = {A method of removing 1,11-diamino-6-undecanone from the pyrolysis product of nylon comprising: a) pyrolyzing nylon-6 to form a pyrolyzate containing a caprolactam mixture; b) dissolving the caprolactam mixture in a solvent to form a solution; c) passing carbon dioxide gas through the solution to form a precipitate; d) removing the precipitate from the solution; and e) recovering the purified caprolactam from the solution.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {1}
}

Patent:

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