“…4b). 44,100,101 These neutral decomposition compounds could be distilled out and re-reacted to IL. Take the recycling of 1-methyl-3-ethylimidazolium chloride ([C 2 mim] [Cl]) from contaminants (not pointed out by the author) as example, 44 when the [C 2 mim][Cl] was heated at a temperature ranging from 200 C to 300 C under reduced pressure, the IL would be partially decomposed to give 1-methylimidizole, 1ethylimidizole, chloromethane and chloroethane.…”