BETA ZEOLITE AS CATALYST OR CATALYST ADDITIVE FOR THE PRODUCTION OF OLEFINS DURING CRACKING OF GASOIL

Beta zeolite is an active cracking catalyst for gasoil which is selective for formulation of highly olefinic C4 and C5 products. The constraints imposed by the channel structure of the Beta give a high ratio of cracking versus hydrogen transfer. It also has an influence on the relative rate of hydrogen transfer for branched and lineal olefins, specially visible when increasing the number of carbons in the chain. When Beta is used as an catalyst additive in FCC, in the same way as ZSM–5 is actually used, relatively higher amounts of Beta have to be added to found sensible results. In this case, the impact of the Beta additive on the final product distribution depends on the USY used, and on the reaction conditions.