Patent ID: 7518025

Claim:
A process for producing an alkyl aromatic compound represented by the general formula (2), characterized in that an aromatic compound represented by the general formula (1) is alkylated with an olefin having 2 to 4 carbon atoms in the presence of a Broensted acid and without the presence of a Lewis acid, and in that the resulting mixture is subsequently added with a Lewis acid and is subjected to isomerization in the copresence of the Broensted acid and the Lewis acid, wherein the temperature at which the reaction of the aromatic compound represented by the general formula (1) with the olefin is performed is not higher than 20° C. but not lower than −20° C., and wherein the Broensted acid is HF and the Lewis acid is BF 3 wherein R 1 and R 2 are each a methyl group , X represents a hydrogen atom or an alkyl group, and R 0 represents an ethyl group, an isopropyl group, a sec-butyl group or a tert-butyl group.