Ionic liquids (IL) are a class of solvents comprised of ions and short-lived ion pairs. Ionic liquids have melting points lower than 100 °C and some are liquid at and below room temperature. Various ionic liquids with different properties can be created by combining different cations and anions.
Ionic liquids exhibit properties such as very low vapor pressure, nonvolatility, high ionic conductivity, high electrochemical and thermal stability with a large range of temperature.
The market for ionic liquids has picked up significantly in 2021. Chevron has started the world's first commercial-scale ISOALKY™ process unit that utilizes ionic liquids to produce alkylate and several start ups have received million dollar funding.