A cautionary note on thermal runaway reactions in mixtures of 1-alkyl-3-methylimidazolium ionic liquids and N-methylmorpholine-N-oxide

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Böhmdorfer S, Hosoya T, Röder T, Potthast A, Rosenau T
Förläggare: SPRINGER
Publiceringsår: 2017
Tidskrift: Cellulose
Tidskriftsakronym: CELLULOSE
Volym: 24
Nummer: 5
Artikelns första sida, sidnummer: 1927
Artikelns sista sida, sidnummer: 1932
Antal sidor: 6
ISSN: 0969-0239


Abstrakt

N-Methylmorpholine-N-oxide (NMMO) cannot be completely separated by extraction from mixtures with common 1,3-dialkylimidazolium ionic liquids (ILs) due to strong ionic interactions between the two components. At elevated temperatures, above approx. 90 degrees C, especially under dry conditions and in the presence of acid, alkylating or acylating agents, remaining NMMO in ILs tends to undergo autocatalytic degradation. This is a highly exothermic, unstoppable process that results in explosions, flames, and complete charring of the reaction mixtures. Thus, caution must be exercised when drying or heating ILs that were in previous contact with NMMO, and the absence of amine oxide must be confirmed to avoid potential danger.


Nyckelord

Binary mixtures, Exothermicity, Extractability, NMMO, Work safety

Senast uppdaterad 2019-22-10 vid 05:12