ALKYLATION CATALYST PREPARATION METHOD Russian patent published in 2006 - IPC B01J37/30 B01J29/40 C07C15/73 

FIELD: organic synthesis catalysts.

SUBSTANCE: invention relates to petrochemical processes, in particular production of ethylbenzene via alkylation of benzene with ethylene catalyzed by solid acid catalyst, and provides elevated-strength (cleavage strength above 2 kg/mm diameter) catalyst showing high characteristics regarding activity (theoretical yield of ethylbenzene 65.83-70.7%) and selectivity (yield of ethylbenzene based on converted benzene 68,18-71.4%). This is achieved by way of mixing Pentasil-type zeolite with binder, said zeolite having been preliminarily subjected to exchange of cations: consecutively ammonium and calcium or magnesium. As binder, pseudoboehemite-structure aluminum hydroxide, to which inorganic acid was add to pH 2-4, is utilized. Molding mass is characterized by calcination loss 35-45 wt %. Heat treatment is effected in one to three steps.

EFFECT: improved strength, activity and selectivity of catalyst.

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