Patent ID: 7544807

Claim:
An ionic liquid of the Formula 1, (cation)(R′SO 4 ) Formula 1 wherein: R′ is selected from the group consisting of a linear or branched, saturated or unsaturated, aliphatic or alicyclic, functionalized or non-functionalized alkyl radical with 3-36 carbon atoms, wherein R′ is optionally functionalized with one or more X groups; X is selected from the group consisting of an —OH, —OR″, —COOH, —COOR″, —NH 2 , —SO 4 , —F, —Cl, —Br, —I or —CN; and R″ is selected from the group consisting of a branched or linear hydrocarbon chain with 1-12 carbon atoms; the compound has a melting point of less than 100° C.; and the cation is a nitrogen-containing cation selected from the group consisting of imidazolium cation, pyridinium cation, pyrazolium cation, and triazolium cation; excluding N-methylpyridinium dodecyl sulfate and N-phenylethylpyridinium dodecyl sulfate.