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US 10,300,476 B2Granted
Methods of regenerating aromatization catalysts with a decoking step between chlorine and fluorine addition
AssigneeChevron Phillips Chemical Company LP
InventorGabriela D. Alvez-Manoli
Life of this patent
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Abstract
Methods for regenerating a spent catalyst in a metal reactor are disclosed. Such methods may employ a step of chlorinating the spent catalyst, followed by decoking the chlorinated spent catalyst, and then fluorinating the de-coked catalyst.
Claims24
A method of regenerating a spent catalyst comprising a transition metal and a catalyst support in a metal reactor, 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 stream comprising a fluorine-containing compound to form a regenerated catalyst containing less than about 1 wt. % of carbon;
- 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 of regenerating a spent catalyst comprising a transition metal and a catalyst support in a metal reactor, the method comprising:
- (i) contacting the spent catalyst with a chlorine-containing stream comprising a chlorine-containing compound to produce a chlorinated spent catalyst;
- (ii) contacting the chlorinated spent catalyst with a chlorine purging stream comprising an inert gas;
- (iii) contacting the chlorinated spent catalyst with a decoking gas stream comprising oxygen to produce a de-coked catalyst;
- (iv) contacting the de-coked catalyst with a fluorine-containing stream comprising a fluorine-containing compound to produce a de-coked and fluorinated catalyst;
- and
- (v) contacting the de-coked and fluorinated catalyst with a fluorine purging stream comprising an inert gas to form a regenerated catalyst containing less than about 1 wt. % of carbon;
- 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 metal 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 stream comprising a fluorine-containing compound to form a regenerated catalyst containing less than about 1 wt. % of carbon;
- 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;
- the aromatization catalyst further comprises chlorine and/or fluorine, and wherein steps (C)-(E) are performed in a metal reactor.
7 more elements
Dependencies are inferred from the claim text.