Abstract: A catalytic process is provided for the selective production of para-xylene by contacting, under conversion conditions, a charge stock containing, as a major reactant, at least one hydrocarbon selected from the group consisting of toluene, a C.sub.3 -C.sub.10 olefin, a C.sub.5 -C.sub.10 naphthene, a C.sub.3 -C.sub.10 paraffin, and mixtures of the foregoing with a catalyst comprising a composite of a crystalline aluminosilicate zeolite and antimony oxide, said zeolite having a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12.

Abstract: A process for making linear alpha-olefins by oligomerization of ethylene in the presence of a catalyst comprising titanium halide-organoaluminum halide (e.g., titanium tetrachloride-ethylaluminum dichloride) and a halogenated phosphorus compound (e.g., PCl.sub.3) provides oligomers of high alpha-purity and high selectivity to linear alpha-olefins with excellent control of product molecular weight.

Abstract: Process for the methylation of toluene under conditions such that the formation of meta-xylene is suppressed and the formation of ortho and para-xylene is enhanced carried out in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, said zeolite having a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, of from 1 to 12, said catalyst having been modified by the addition thereto of a Group VA element in an amount of at least 0.5 percent by weight.

Abstract: Process for the selective production of para-xylene by methylation of toluene in the presence of a catalyst comprising a crystalline aluminosilicate zeolite, said zeolite having a silica to alumina ratio of at least about 12 and a constraint index, as hereinafter defined, within the approximate range of 1 to 12 which catalyst has undergone prior treatment with steam to reduce the alpha value thereof to less than about 500 and preferably within the range of less than about 20 but greater than zero.