CATALYSTS FOR BENZENE ALKYLATION WITH HIGH OLEFINS BASED ON BENTONITE

Several catalysts based on natural bentonite-type clay were synthesize d, and their physicochemical and catalytic properties in the reaction of benzene alkylation with olefins were investigated. By pillaring ben tonite with an oligomeric aluminum-containing hydroxycation, a thermal ly stable catalyst with a basal spacing of approximately 18 angstrom a nd a specific surface area of 236 m2/g was prepared. The pillared bent onite and uncalcined, Al-exchanged clay exhibited high activity in the reaction of benzene alkylation with high olefins; the conversion Of C 6 - C-12 olefins at 150 - 200-degrees-C reached 100% at a selectivity to monoalkylbenzenes greater than 80%. When using these olefins, the p illared clay had no advantages as compared with Al-exchanged bentonite . The differences were revealed for benzene alkylation with high olefi ns (hexadecene).