PRODUCTION OF CATALYST AND DEHYDROGENATION OF C2-C4 PARAFFIN

摘要

A process is described wherein C2-C4 paraffins are dehydrogenated over a catalyst which has been prepared by (a) impregnating an Al2O3 carrier with an aqueous solution of a Sn-compound; (b) calcining the impregnated carrier; (c) impregnating the composition with an aqueous solution of a Pt-compound; (d) reducing the composition; (e) removing at least part of any halogen introduced in step (a) and/or (c) by treating the composition with a non-acidic solution comprising NH4+ ions until the halogen content of the final catalyst amounts to less than 0.1% w; and (f) impregnating the composition with a non-acidic (halogen-free) aqueous solution of an alkali metal compound. The C2-C4-olefins formed are converted to aromatic gasoline over a catalyst containing a crystalline metal silicate having a ZSM-5 structure.