Styrene oligomerization catalyzed by zeolites of different structural types

It was shown that styrene oligomerization in the presence of the zeolite ZSM-12 in a solvent (chlorobenzene) as well as without it proceeds with a high conversion (98–100 wt %) and a high selectivity for linear dimers (up to 82%). The main oligomerization products in the presence of the zeolite Beta are dimers (70–80%), mostly the linear isomer trans-1,3-diphenylbut-1-ene. In the presence of the less active zeolite Y, styrene gives a complex mixture of oligomers in which dimers (53–60%, in chlorobenzene) or dimers and trimers (60–80%, in bulk) are predominant.