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Additionally, amine-oxides, and particularly NMMO, have a limited thermal stability, which varies depending on their structure. The monohydrate of NMMO melts at temperatures of approximately 72° C., and the water-free compound melts at 172° C. When the monohydrate is heated, strong discolourings will occur from a temperature of 120°/130° C. on. Such temperatures however are common in processes for the production of cellulose moulded bodies. From 175° C. on, strong exothermal reactions will occur, which may lead to explosions. During this reaction, NMMO is thermally degraded, producing particularly N-methyl-morpholine, morpholine, formaldehyde and CO2.

1. custommelts at temperatures of approximately 72° C.
2. customwill occur from a temperature of 120°/130° C.
3. customFrom 175° C.