VERFAHREN ZUR REGENERIERUNG EINES KATALYSATORS FUER DIE ENTALKYSIERUNG VON AROMATISCHEN KOHLENWASSERSTOFFEN MIT WASSERDAMPF

摘要

A catalyst for the steam dealkylation of aromatic hydrocarbons, comprising a carrier and 3 metals, is regenerated in the reaction zone containing the catalyst bed, after disconnection of said zone from the producing unit, by proceeding to the successive steps of: scavenging said zone with hydrogen and then with an inert gas, progressively replacing said inert gas by a gas containing molecular oxygen, burning the catalyst at a temperature lower than 650 DEG C. so as to calcine the carbon deposits of the catalyst, passing through the catalyst bed an air stream containing halogen to increase the halogen content of the catalyst, calcining by means of an air stream at a temperature of 300 DEG -600 DEG C. and purging with an inert gas before reconnecting said reaction zone to the producing unit.