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US 9,174,895 B2Granted
Methods of regenerating aromatization catalysts
AssigneeChevron Phillips Chemical Company LP
InventorAn-Hsiang Wu
Life of this patent
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Abstract
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.
Claims20
A method of treating a spent catalyst comprising a transition metal and a catalyst support, the method comprising:
- (1) contacting the spent catalyst with a chlorine-containing stream comprising a chlorine-containing compound to produce a chlorinated spent catalyst;
- (2) contacting the chlorinated spent catalyst with a fluorine-containing stream comprising a fluorine-containing compound to produce a chlorinated-fluorinated spent catalyst;
- and
- (3) contacting the chlorinated-fluorinated spent catalyst with a decoking gas stream comprising oxygen;
- wherein the spent catalyst comprises from about 0.1 wt. % to about 10 wt. % transition metal, based on the weight of the spent catalyst excluding carbon.
2 more elements
A reforming process comprising:
- (A) contacting a hydrocarbon feed with an aromatization catalyst comprising a transition metal and a catalyst support under reforming conditions in a reactor system to produce an aromatic product;
- (B) performing step (A) for a time period sufficient to form a spent aromatization catalyst;
- (C) contacting the spent aromatization catalyst with a chlorine-containing stream comprising a chlorine-containing compound to produce a chlorinated spent catalyst;
- (D) contacting the chlorinated spent catalyst with a fluorine-containing stream comprising a fluorine-containing compound to produce a chlorinated-fluorinated spent catalyst;
- and
- (E) contacting the chlorinated-fluorinated spent catalyst with a decoking gas stream comprising oxygen;
- wherein the spent aromatization catalyst comprises from about 0.1 wt. % to about 10 wt. % transition metal, based on the weight of the spent aromatization catalyst excluding carbon.
4 more elements
Dependencies are inferred from the claim text.