Merck Patent Gmbh

Litarion Gmbh

Roy Van Hal

Peter Wasserscheid

Andreas Bösmann

Marc Uerdingen

Claus Hilgers

Martin Schuster

Armin Modlinger

An ionic liquid according to the invention is substantially halogen-free, has a low viscosity and is stable to hydrolytic degradation under test conditions. The ionic liquid is a compound of the formula (cation) (R'&#x2014;O&#x2014;SO), (cation) (R&#x2032;&#x2014;SO), or a mixture of the two compounds. It can be used in processes for the chemical conversion and separation of materials by employing the ionic liquid as a solvent, solvent additive, extraction agent or phase-transfer catalyst. It can also be used in a heat exchange device wherein the ionic liquid serves as a heat carrier or heat carrier additive.

Halogen-free ionic liquids

The invention relates to a process for the preparation of ionic liquids of general formula (cation)(R'&#x2014;O&#x2014;SO). The process includes the step of treating the compound of formula (cation)(R&#x2014;O&#x2014;SO) with an alcohol, or mixture of different alcohols, of the formula R&#x2032;&#x2014;OH optionally in the presence of a catalyst to form the desired ionic liquid and the by-product R&#x2014;OH, which is optionally removed during the reaction or after completion of the reaction. The compound of formula (cation)(R&#x2014;O&#x2014;SO) can be prepared by alkylating a tertiary or aromatic amine with a dialkylsulfate.

Process for the preparation of ionic liquids with alkyl sulfate and functionalized alkyl sulfate anions

Low melting ionic compounds of the general formula (cation) (R'SO) in which R&#x2032; is a branched or linear, saturated or unsaturated, aliphatic or alicyclic functionalized or non-functionalized hydrocarbon chain with 3-36 carbon atoms are provided. These compounds can serve as ionic liquids, e.g. as solvents or solvent additives in chemical reactions, as extraction agents or as heat carriers. The compounds comprise a cation and anionic sulfate ester.

Ionic liquids

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Kö'ln, Germany

Roy Van Hal