XYLENE ISOMERIZATION PROCESS

摘要

A process for isomerizing a non-equilibrium xylene feed mixture is disclosed. The izomerization is conducted in the presence of hydrogen and at pressures in excess of 75 psig (517 kPa) over a ZSM-5 type catalyst containing about 0.1 to 5 wt.% of at least one metal selected from the group consisting of zinc, copper, silver and gallium. In another embodiment, the catalyst may further contain an oxide of at least one element selected from silicon, germanium and tin. The process produces a product containing about or above equilibrium quantities of para-xylene with low xylene loss.