Purification of caprolactam from recycled nylon

Patent · Tue Jul 06 00:00:00 EDT 1999

OSTI ID:6439874

Moens, L

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.

• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC36-83CH10093
• Assignee: Midwest Research Inst., Kansas City, MO (United States)
• Patent Number(s): US 5919927; A
• Application Number: PPN: US 9-058403
• OSTI ID: 6439874
• Resource Relation: Patent File Date: 9 Apr 1998
• Country of Publication: United States
• Language: English

Related Subjects

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