2.B.4 - Caprolactam, Glyoxal and Glyoxylic Acid Production
NITROUS OXIDE
2006 IPCC default
N2O Emission Factor for Caprolactam Production (default)
No abatement
9.0
kg N2O/tonne caprolactam produced
2006 IPCC Guidelines for National Greenhouse Gas Inventories (Volume 3, Chapter 3, Table 3.5)
225291
2B5 - Other (please specify)
2.B.4 - Caprolactam, Glyoxal and Glyoxylic Acid Production
NITROUS OXIDE
Other (e.g. compiled)
N2O emission factor for caprolactam production
Traditional technology from cyclohexanone and hydroxylamine sulphate using the Rasching process. Cyclohexanone reacts with hydroxylamine sulphate yielding cyclohexanonoxime, from which caprolactam is produced by the Beckmann rearrangement. Then caprolactam is isolated from the reaction mixture by neutralisation with ammonium hydroxide.