REGENERATION OF AROMATIZATION CATALYSTS

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 1.5 psia, oxygen havin...

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Bibliographische Detailangaben
Hauptverfasser: HUANG, ROBERT YAO-JYH, FUNG, SHUN CHONG
Format: Patent
Sprache:eng ; fre
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Zusammenfassung: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 1.5 psia, oxygen having a partial pressure of less than 4.5 psia, and an inert gas at a temperature within the range of about 450 ·C to about 530 ·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.