COMPOSITE IONIC LIQUID CATALYST

摘要

The present invention relates to a composite ionic liquid comprising ammonium cations and composite coordinate anions derived from two or more metal salts, wherein at least one metal salt is an aluminium salt and any further metal salt is a salt of a metal selected from the group consisting of Group IB elements of the Periodic Table, Group IIB elements of the Periodic Table and transition elements of the Periodic Table, wherein the ammonium cation is a N,N′-disubstituted imidazolium cation, the substituents independently being selected from C1-C10 alkyl, and C6-C10 aryl. The composite ionic liquid of the invention is a stable catalyst, which can suitably be used to run an ionic liquid alkylation process which produces less solids and an alkylate product comprising less organic chlorides as side products than processes known from the prior art.