N-Methylmorpholine-N-oxide ring cleavage registration by ESR under heating conditions of the Lyocell process

A Konkin; F Wendler; F Meister; H-K Roth; A Aganov; O Ambacher

doi:10.1016/j.saa.2007.06.026

N-Methylmorpholine-N-oxide ring cleavage registration by ESR under heating conditions of the Lyocell process

Spectrochim Acta A Mol Biomol Spectrosc. 2008 Mar;69(3):1053-5. doi: 10.1016/j.saa.2007.06.026. Epub 2007 Jun 29.

Authors

A Konkin¹, F Wendler, F Meister, H-K Roth, A Aganov, O Ambacher

Affiliation

¹ Technical University of Ilmenau, Institute for Micro and Nanotechnologies, Gustav-Kirchhoff-Str. 7, D-98693 Ilmenau, Germany.

PMID: 17686653
DOI: 10.1016/j.saa.2007.06.026

Abstract

Thermal cleavage processes of N-methylmorpholine-N-oxide monohydrate (NMMO) were observed in pure NMMO as well as in cellulose/NMMO solutions by ESR at temperatures of the industrial Lyocell process ( approximately 370K). Generated radicals were attributed to the alkylnitroxyl type radicals -CH(2)-NO-CH(3) in NMMO and additional (and dominated) -CH(2)-NO-CH(2)- in cellulose/NMMO solutions. Formation of both radical types formed due to NMMO ring scission is suggested.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Cellulose / chemistry*
Computer Simulation
Cyclic N-Oxides / chemistry*
Electron Spin Resonance Spectroscopy
Free Radicals / chemistry
Hot Temperature*
Morpholines / chemistry*

Substances

Cyclic N-Oxides
Free Radicals
Morpholines
Cellulose
4-methylmorpholine N-oxide