The catalytic performance of β-zeolites modified by Fe or La was investigated in the alkylation of benzene with 1-butylene in a fixedbed reactor.Effects of metal content

temperature and feed ratio on the reaction were studied.The structure and acidity of modified β-zeolites were characterized by XRD

BET

NH3-TPD and TG-DTA.The quantities of both strong and weak acid decreased evidentlyEspecially

the acidity of the β-zeolite modified by La is higher than that modified by Fe

and the La modified β-zeolite shows better catalytic performance and stronger coke-resistance

which is supported by the results obtained by BET and TG-DTA.Both of Fe and La modified β-zeolites show better catalytic performance than the original one.After 6 h reaction over 2.0%La/β-zeolites at 453 K with WHSV of 0.6 h-1 for 1-butylene and of 1.2 h-1 for benzene

the conversion of 1-butylene is 87.9% with the selectivity of 88.2% for sec-butylbenzene.