摘要：

The various categories of cations & anions and purification of ionic liquids are reviewed. The intrinsic properties of ionic liquids make purification difficult and therefore a special emphasis is placed on currently employed purification methodologies together with ionic liquid impurities. For the same reason highlighted above characterization of ionic liquid impurities presents unique challenges; the available methods and some of the issues of their use are also reviewed. This chapter gives a survey on the pilot plants and industrial processes of ionic liquids. Moreover, challenges, issues, and recycling methods of ionic liquids in industrial developments are also discussed.

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