TITLE

The undesirable acetylation of cellulose by the acetate ion of 1-ethyl-3-methylimidazolium acetate

AUTHOR(S)
Karatzos, Sergios; Edye, Leslie; Wellard, Robert
PUB. DATE
February 2012
SOURCE
Cellulose;Feb2012, Vol. 19 Issue 1, p307
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The ionic liquid (IL) 1-ethyl-3-methylimidazolium acetate ([C2mim]OAc) is considered to be an inert solvent of cellulose and lignocellulosic biomass. Acetylation (1.7% mol, or DS 0.017) of cellulose after dissolution in technical grade [C2mim]OAc (150 °C for 20 min), is demonstrated by compositional analysis, FTIR analysis and C NMR spectroscopy (in [C2mim]OAc with C enriched acetate). This acetylation, in the absence of added acylating agents, has not been reported before and may limit [C2mim]OAc utility in industrial scale biomass processing, even at this low extent. For example, cellulose acetylation may contribute to IL loss in processes where the IL is recovered and reused and inhibit enzyme saccharification of cellulose in lignocellulosic biofuel production processes based on saccharification and fermentation. Graphical abstract: [Figure not available: see fulltext.]
ACCESSION #
70129499

 

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