chapter  22
On the Use of Ionic Liquid Technology for the Selective Separation of Organic Compounds and Metal Ions
Pages 14

Ionic liquids (ILs) are organic salts remaining as liquids under ambient temperatures. They normally consist of an organic cation (e.g., imidazolium, pyridinium, pyrrolidinium, phosphonium, ammonium) and a polyatomic inorganic anion (e.g., tetrauoroborate, hexauorophosphate, chloride) or, more and more current, an organic anion (e.g., triuoromethylsulfonate, bis[(triuoromethyl)sulfonyl]imide) [1]. The structures of common cations and anions of ILs are shown in Figure 22.1. They are emerging as a valuable addition to the chemist’s and engineer’s toolbox to solve specic problems in the past decades.