Methods for Regenerating Sulfur-Contaminated Aromatization Catalysts
AssigneeChevron Phillips Chemical Company LP
InventorRyan W. Snell
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Abstract
Methods for regenerating a sulfur-contaminated catalyst are disclosed. Such methods may employ a step of washing the sulfur-contaminated catalyst with an aqueous solution containing an alkali metal, followed by contacting the washed catalyst with a halogen solution containing chlorine and fluorine.
Claims40
A method for regenerating a sulfur-contaminated catalyst comprising a transition metal and a catalyst support, the method comprising:
- (1) washing the sulfur-contaminated catalyst with an aqueous solution, the aqueous solution optionally comprising an alkali metal, to produce a washed catalyst;
- and
- (2) contacting the washed catalyst with a halogen solution comprising chlorine and fluorine to produce a halogenated catalyst.
A reforming method 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) contacting a sulfur-contaminated hydrocarbon feed with the aromatization catalyst for a time period sufficient to form a sulfur-contaminated catalyst;
- (C) washing the sulfur-contaminated catalyst with an aqueous solution to produce a washed catalyst, the aqueous solution optionally comprising an alkali metal;
- and
- (D) contacting the washed catalyst with a halogen solution comprising chlorine and fluorine to produce a halogenated catalyst.
A method for regenerating a sulfur-contaminated catalyst comprising a transition metal and a catalyst support, the method comprising:
- (1) washing the sulfur-contaminated catalyst with an aqueous solution, the aqueous solution optionally comprising an alkali metal, to produce a washed catalyst;
- (2) contacting the washed catalyst with a halogen solution comprising chlorine and fluorine to produce a halogenated catalyst;
- and
- (3) drying and calcining the halogenated catalyst to produce a regenerated catalyst.
A method for regenerating a sulfur-contaminated catalyst comprising a transition metal and a catalyst support, the method comprising:
- (a) washing the sulfur-contaminated catalyst with an aqueous solution, the aqueous solution optionally comprising an alkali metal, to produce a washed catalyst;
- (b) contacting the washed catalyst with decoking gas stream comprising oxygen to produce a decoked catalyst containing less than about 1 wt. % carbon;
- and
- (c) contacting the decoked catalyst with a halogen solution comprising chlorine and fluorine to produce a halogenated catalyst.
Dependencies are inferred from the claim text.