Higher alkylaromatic hydrocarbons (HAAH) are widely used in the production of a number of surface-active substances (SAS), synthetic oils, and heat-transfer agents. The aim of the present paper was to determine the possibility of using benzene derivatives, namely toluene and xylene, for single-stage production of HAAH by the telomerization of ethylene (oligoalkylation) in the presence of BFCC, and also to study the effect of different factors on the yield and composition of products.