CATALYTIC PROPERTIES OF PALLADIUM ZEOLITE SYSTEMS IN THE SYNTHESIS OFSEC-BUTYLBENZENE FROM BENZENE AND ETHYLENE

A study has been made of the relationships governing the catalytic act ion, special features, and scope for use of the bifunctional systems P d-amorphous aluminosilicate and Pd-zeolite (HY, M(n)+NaY, H-pentasil) in the synthesis of sec-butylbenzene (SBB) from benzene and ethylene a t a pressure of 0.1 MPa and 100-200-degrees-C. It has been shown that, by changing the ratio of the dimerizing and alkylating functions of t he catalyst, and also the process conditions, it is possible to direct the interaction of the reactants towards the formation mainly of SBB or SBB and C4-C6 olefins, achieving a selectivity of conversion of eth ylene to the given products of 80-92%. Pd-zeolite contacts are compare d with Ni-zeolite systems previously investigated.