Process for preparing alpha-methylstyrene unsaturated dimer

摘要

A process for preparing unsaturated dimers of alpha -methylstyrene comprising dimerizing alpha -methylstyrene using activated clay or acid clay as a catalyst, in which the dimerization is carried out in the presence of a carbonic acid ester, preferably ethylene carbonate, which process achieves high selectivity to unsaturated dimers with ease in controlling the reaction temperature.