C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 223/10 (2006.01) C07D 201/12 (2006.01) C07D 201/16 (2006.01) C08J 11/14 (2006.01)
Patent
CA 2248686
The present invention provides an improved process for the recovery of caprolactam from polycaprolactam processing waste. The present process for depolymerizing polycaprolactam waste to form caprolactam comprises the step of: in the absence of added catalyst, contacting the polycaprolactam waste with superheated steam at a temperature of about 250 °C to about 400 °C and at a pressure within the range of about 1.5 atm to about 100 atm and substantially less than the saturated vapor pressure of water at the temperature wherein a caprolactam-containing vapor stream is formed. The formed caprolactam may then be used in the production of engineered resins and fibers.
Levy Alan Bart
Sifniades Stylianos
Alliedsignal Inc.
Gowling Lafleur Henderson Llp
Honeywell International Inc.
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