| abstract |
High severity catalytic conversion of olefinic naphthas which contain diolefins is conducted over special catalysts to yield a product stream which contains little or no non-aromatics boiling in the range of benzene, toluene and xylene. The catalysts are combinations of zinc and a metal of Groups I B and VIII of the Periodic Table with a crystalline aluminosilicate zeolite having a silica/alumina ratio greater than 12 and a constraint index not less than one nor greater than 12. |