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 and diolefins, 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 comprising 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++0 : 0-0.2 M 2/n O : Al 2 O 3 : 20-100 SiO 2 , wherein M is at least one cation other than Cu ++ .