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US 10,556,225 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.
Claims21
A method for regenerating a chlorinated spent catalyst comprising a transition metal and a catalyst support, the method comprising:
- (i) contacting the chlorinated spent catalyst with a decoking gas stream comprising oxygen to produce a de-coked chlorinated catalyst,
- wherein the chlorinated spent catalyst comprises from about 0.5 wt. % to about 3 wt. % of chlorine;
- and
- (ii) contacting the de-coked chlorinated 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;
- and
- 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.
5 more elements
A method for regenerating a de-coked chlorinated catalyst comprising a transition metal and a catalyst support, the method comprising:
- contacting the de-coked chlorinated catalyst with a fluorine-containing solution comprising a fluorine-containing compound in the liquid phase to produce a fluorinated catalyst;
- wherein:
- the de-coked chlorinated catalyst comprises from about 0.5 wt. % to about 3 wt. % of chlorine;
- the de-coked chlorinated catalyst comprises less than about 0.5 wt. % carbon;
- the transition metal comprises a Group 8-11 transition metal;
- and
- 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.
4 more elements
Dependencies are inferred from the claim text.