Conversion of certain hydrocarbons using divalent-copper-containing ZSM-5 type catalyst

Claim 1

A low severity process for the preparation of a benzene-toluene-xylenes enriched stream containing minimal monoolefins and diolefins, from a feed stream comprising a by-product effluent of a process for the pyrolitic cracking of hydrocarbons to produce light olefins or diolefins, said by-product effluent stream containing olefins, diolefins, or a C 4 -C 9+ fraction said process comprising contacting said by-product effluent stream, under low severity conditions including a temperature within the range of about 300°-700° C., a pressure within the range of about 0 to 100 atmospheres, and a weight hourly space velocity within the range of about 0.1 to about 20, with a catalyst essentially consisting of a divalent-copper-containing ZSM-5 type catalyst, said catalyst comprising an aluminosilicate zeolite of the ZSM-5 type, said zeolite prior to copper exchange having a silica/alumina ratio of between about 20 and 100, and an x-ray diffraction pattern having at least the d-spacings set forth in the "X-Ray Diffraction Pattern" table above, the resulting divalent copper exchanged zeolite catalyst having the formula: 1.6-2.0 Cu++O : 0-0.2 M.sub.2/n O : Al.sub.2 O.sub.3 : 20-100 SiO.sub.2, wherein M is at least one cation other than Cu ++ .