Highlights
Ionic liquids are salts that are normally liquid at ambient temperature and in some cases, are liquids at room temperature
Widely-available methylimidazolium ionic liquids are a class of ionic liquids composed of a cationic methylimidazolium moiety with an alkyl chain increasing in length by 2 carbons and a variety of different anions (e.g. Cl, Br, tetrafluoroborate etc)
Based on registrations submitted to the European Chemicals Agency (ECHA), the total number of methylimidazolium ionic liquids used in the EU at present, is likely to be in the order of up to 60–70 [3]
Summary
Ionic liquids are salts that are normally liquid at ambient temperature (typically below 100 ̊C) and in some cases, are liquids at room temperature. Methylimidazolium-based ILs are most often proposed as solvents in a variety of industrial applications such as separations, catalysis and dissolution, with 1-ethyl-3-methylimidazolium acetate (likely used at high levels since the ECHA database indicates several variants manufactured at up to 100 tonnes/annum or manufacture levels are reported as confidential [3]). This methylimidazolium ionic liquid has shown outstanding performance in the fields of biomass dissolution and biopolymer processing [4]
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