Fixed bed/moving bed reforming with high activity, high yield tin modified platinum-iridium catalysts

摘要

A two stage process for reforming a naphtha feed at low severities with tin modified platinum-iridium catalysts. In particular, both high selectivity, and high activity are manifested by such catalysts in reforming a naphtha feed at low severities in a first fixed-bed reforming stage which is comprised of a series of reforming zones, or reactors; i.e., within the dehydrogenation and ring isomerization zones of a reforming unit. The first stage zones are charged with a tin-containing platinum-iridium catalyst, and the naphtha feed reformed to produce an intermediate RON clear C5+ liquid reformate. The intermediate octane product of the first reforming stage is passed to a second stage which is comprised of one or more moving-bed reforming zones, or reactors, which are operated in a continuous catalyst regeneration mode with platinum containing catalyst.