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Title: Purification of caprolactam from recycled nylon

Abstract

A method is disclosed 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. 3 figs.

Inventors:
Issue Date:
Sponsoring Org.:
USDOE; USDOE, Washington, DC (United States)
OSTI Identifier:
6439874
Patent Number(s):
5919927 A
Application Number:
PPN: US 9-058403
Assignee:
Midwest Research Inst., Kansas City, MO (United States) PTO; EDB-99-084652
DOE Contract Number:  
AC36-83CH10093
Resource Type:
Patent
Resource Relation:
Patent File Date: 9 Apr 1998
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; CHEMICAL INDUSTRY; MATERIALS RECOVERY; NYLON; PYROLYSIS; PYROLYSIS PRODUCTS; RECYCLING; CHEMICAL REACTIONS; DECOMPOSITION; INDUSTRY; MANAGEMENT; MATERIALS; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PETROCHEMICALS; PETROLEUM PRODUCTS; PLASTICS; POLYAMIDES; POLYMERS; PROCESSING; SYNTHETIC MATERIALS; THERMOCHEMICAL PROCESSES; WASTE MANAGEMENT; WASTE PROCESSING; 320305* - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Industrial Waste Management

Citation Formats

Moens, L. Purification of caprolactam from recycled nylon. United States: N. p., 1999. Web.
Moens, L. Purification of caprolactam from recycled nylon. United States.
Moens, L. Tue . "Purification of caprolactam from recycled nylon". United States.
@article{osti_6439874,
title = {Purification of caprolactam from recycled nylon},
author = {Moens, L.},
abstractNote = {A method is disclosed 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. 3 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {7}
}