Purification of caprolactam from recycled nylon

Patent · Fri Jan 01 00:00:00 EST 1999

OSTI ID:872370

Moens, Luc ^[1]

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1. Lakewood, CO

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.

• Research Organization: Midwest Research Institute, Kansas City, MO (United States)
• DOE Contract Number: AC36-83CH10093
• Assignee: Midwest Research Institute (Kansas City, MO)
• Patent Number(s): US 5919927
• OSTI ID: 872370
• Country of Publication: United States
• Language: English

Related Subjects

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/