Regeneration of aromatization catalysts

Details Regeneration of aromatization catalysts Regeneration of aromatization catalysts

1993-12-07

1998-01-27

Achutamurthy, Ponnathapura

Catalyst, solid sorbent, or support therefor: product or process

Regenerating or rehabilitating catalyst or sorbent

Gas or vapor treating

208140, 502 35, 502 36, B01J 2990, B01J 3842, B01J 3844, C10G 35095

Patent

active

057122148

ABSTRACT:
A low-pressure, high-temperature, wet post-treatment after oxyhalogenation during regeneration to improve activity and selectivity recovery of a regenerated catalyst involves exposing a halogenated catalyst to a gaseous stream including water having a partial pressure of up to about 1.5 psia, oxygen having a partial pressure of less than about 4.5 psia, and an inert gas at a temperature within the range of about 450.degree. C. to about 530.degree. C. at a pressure within the range of about 14.7 psia to about 65 psia for a time sufficient to effect a hydrogen halide partial pressure in offgas from the halogenated catalyst of less than about 0.004 psia to effectively remove excess halide from the halogenated catalyst.

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