TRANSFORMATION OF 1-BUTENE OVER SYNTHETIC ZEOLITES

Article abstract of DOI:10.1135/cccc19920869

The behaviour of several zeolites as catalysts for the title reaction has been investigated by means of a continuous flow microreactor.Runs performed at atmospheric pressure indicated that at 423 K the completely protonic forms of the zeolites catalyze just the isomerization reaction.In the case of Y zeolites, oligomerization occures only over the partially decationated samples, in the temperature range between 373 and 423 K and W/F between 0.2 and 22 g_cath/g_1-but, to an extent which depends on the reaction conditions.Most of the catalysts were tested also under pressure (4.05 MPa) at 423 K.The protonic forms of Y and ZSM-5 zeolites seem promising catalysts in terms of both conversion and selectivity to oligomers.The 1-olefins account for 30percent of the entire olefinic mixture.The octenes, which account for 70percent of the liquid mixture, are mostly formed of dimethylhexenes.Trimers are also formed during the reaction and, in the very particular case of HZSM-5, tetramers are produced.