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US 10,307,740 B2Granted
Methods of regenerating aromatization catalysts with a decoking step between chlorine and fluorine addition
AssigneeChevron Phillips Chemical Company LP
InventorsRyan W. Snell, Gabriela D. Alvez-Manoli
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Abstract
Methods for regenerating a spent catalyst are disclosed. Such methods may employ a step of chlorinating the spent catalyst in the gas phase, followed by decoking the chlorinated spent catalyst, and then fluorinating the de-coked catalyst in a fluorine-containing solution of a fluorine-containing compound.
Claims22
A method for regenerating 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 decoking gas stream comprising oxygen to produce a de-coked catalyst;
- and
- (3) contacting the de-coked catalyst with a fluorine-containing solution comprising a fluorine-containing compound in the liquid phase to produce a fluorinated catalyst;
- wherein:
- the transition metal comprises a Group 8-11 transition metal;
- the catalyst support comprises a large pore zeolite having an average pore diameter in a range of from about 7 Å to about 12 Å;
- and
- the spent catalyst further comprises chlorine and/or fluorine.
6 more elements
A method for regenerating a spent catalyst comprising a transition metal and a catalyst support, the method comprising:
- (a) contacting the spent catalyst with a pre-drying gas stream comprising an inert gas;
- (b) contacting the spent catalyst with a chlorine-containing stream comprising a chlorine-containing compound to produce a chlorinated spent catalyst;
- (c) contacting the chlorinated spent catalyst with a decoking gas stream comprising oxygen to produce a de-coked catalyst;
- (d) contacting the de-coked catalyst with a fluorine-containing solution comprising a fluorine-containing compound in the liquid phase to produce a fluorinated catalyst;
- and
- (e) drying, calcining, or both drying and calcining the fluorinated catalyst;
- wherein:
- the transition metal comprises a Group 8-11 transition metal;
- the catalyst support comprises a large pore zeolite having an average pore diameter in a range of from about 7 Å to about 12 Å;
- and
- the spent catalyst further comprises chlorine and/or fluorine.
8 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 catalyst;
- (C) contacting the spent 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 decoking gas stream comprising oxygen to produce a de-coked catalyst;
- and
- (E) contacting the de-coked catalyst with a fluorine-containing solution comprising a fluorine-containing compound in the liquid phase to produce a fluorinated catalyst;
- wherein:
- the transition metal comprises a Group 8-11 transition metal;
- the catalyst support comprises a large pore zeolite having an average pore diameter in a range of from about 7 Å to about 12 Å;
- and
- the aromatization catalyst further comprises chlorine and/or fluorine.
8 more elements
Dependencies are inferred from the claim text.