Abstract: An improved catalyst is disclosed for the conversion of aromatic hydrocarbons which comprise a Group VIII metal, lead, a pentasil zeolite, and an inorganic oxide binder, wherein 80-100% of the Group VIII metal and 60-100% of the lead are contained on the binder. An alkylaromatic isomerization process also is disclosed which is particularly effective for the conversion of ethylbenzene without substantial loss of xylenes.

Abstract: An improved reforming process utilizing a novel trimetallic catalytic composite is disclosed. The composite comprises a refractory support having a nominal diameter of at least 650 microns and having deposited thereon a uniformly dispersed platinum component, a uniformly dispersed Group IVA metal component and a surface-impregnated metal component selected from the group consisting of rhdoium, ruthenium, cobalt, nickel, or iridium. When this catalytic composite is used in the reforming of hydrocarbons at low pressures, significant improvements in activity and stability are observed compared to catalysts of the prior art.

Abstract: A nonacidic hydrocarbon conversion catalyst is disclosed which is prepared by incorporating potassium hydroxide into a composite of nonacidic L-zeolite and amorphous silica. A preparation procedure is also disclosed as well as a process for dehydrocyclizing C.sub.6 to C.sub.8 aliphatic hydrocarbons.