Methods of regenerating aromatization catalysts

摘要

Methods for treating or rejuvenating a spent catalyst are disclosed. Such methods can employ a step of halogenating the spent catalyst, followed by decoking the halogenated spent catalyst. The halogenation step can utilize fluorine and chlorine together, or fluorine and chlorine can be applied sequentially.

主权项

1. A method of treating a spent catalyst comprising platinum and a catalyst support, the method comprising:
(i) contacting the spent catalyst with a pre-drying gas stream consisting essentially of an inert gas; (ii) contacting the spent catalyst with a chlorine-containing stream comprising a chlorine-containing compound to produce a chlorinated spent catalyst; (iii) contacting the chlorinated spent catalyst with a fluorine-containing stream comprising a fluorine-containing compound to produce a chlorinated-fluorinated spent catalyst; (iv) contacting the chlorinated-fluorinated spent catalyst with a purging stream consisting essentially of an inert gas; and (v) contacting the chlorinated-fluorinated spent catalyst with a decoking gas stream comprising oxygen to produce a de-coked catalyst.