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:
-
- 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}
}
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