Abstract
The number of “green” applications of ionic liquids (ILs) is progressively growing in recent years due to the chemical industry reorientation, including catalysis, towards environmentally friendly processes. Sulfuric acid production using silica-supported alkali metal pyrosulfate-vanadium oxide catalyst (M 2S 2O7-V2O5, hereinafter M = Na, K or Cs) was the first prominent application of an IL system in catalysis. SO2 oxidation to SO3 is carried out at high temperatures, where the active component of the catalyst is a melt [1]. Today, similar IL systems are used in the processes of flue gas purification [2], and the technological benefits are recognised worldwide. A recently discovered promising method for the catalytic epoxidation of olefins with supported alkali nitrate melts exemplifies another breakthrough application of catalysis by IL [3].
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Lapina, O.B., Terskikh, V.V., Bal’Zhinimaev, B.S., Eriksen, K.M., Fehrmann, R. (2003). High-Temperature NMR Studies of Ionic-Liquid Catalysts. In: Rogers, R.D., Seddon, K.R., Volkov, S. (eds) Green Industrial Applications of Ionic Liquids. NATO Science Series, vol 92. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0127-4_5
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