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US 8,716,161 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.
Claims26
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 halogen-containing stream comprising chlorine and fluorine to produce a halogenated spent catalyst;
- (2) contacting the halogenated spent catalyst with a purging stream consisting essentially of an inert gas;
- and
- (3) contacting the halogenated spent catalyst with a decoking gas stream comprising oxygen;
- wherein the decoking gas stream contains less than 50 ppmw of halogen-containing compounds.
2 more elements
A method of treating a spent catalyst comprising a transition metal and a catalyst support, the method comprising:
- (i) contacting the spent catalyst with a halogen-containing stream comprising chlorine and fluorine to produce a halogenated spent catalyst;
- and
- (ii) contacting the halogenated spent catalyst with a decoking gas stream comprising oxygen;
- wherein the decoking gas stream contains less than 50 ppmw of halogen-containing compounds.
1 more element
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 halogen-containing stream comprising chlorine and fluorine to produce a halogenated spent catalyst;
- (d) contacting the halogenated spent catalyst with a purging stream consisting essentially of an inert gas;
- and
- (e) contacting the halogenated spent catalyst with a decoking gas stream comprising oxygen;
- wherein the decoking gas stream contains less than 50 ppmw of halogen-containing compounds.
4 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 halogen-containing stream comprising chlorine and fluorine to produce a halogenated spent catalyst;
- and
- (d) contacting the halogenated spent catalyst with a decoking gas stream comprising oxygen;
- wherein the decoking gas stream contains less than 50 ppmw of halogen-containing compounds.
3 more elements
Dependencies are inferred from the claim text.