US 2010/0248943 A1 · Integrated Regeneration of Non-Noble Metal Catalysts

Abstract

Regeneration flue gas streams containing unacceptable levels of CO can be effectively combusted (i.e., for more complete combustion or oxidation of CO to CO2) by contact with a second catalyst undergoing regeneration, for example in a second regenerator. While the second catalyst may also be regenerated by contact with an oxygen-containing gas stream, this second catalyst additionally comprises a noble metal, or is present in combination with a combustion comprising a noble metal. Representative catalysts used in an integrated regeneration process are those used for oxygenate conversion and olefin cracking, both for the purpose of producing light olefins (e.g., ethylene and propylene).

Claims20

Dependent claims

A method for regenerating a catalyst having coke deposited thereon, the method comprising:

(a) contacting an oxygen-containing regeneration gas stream with the catalyst to burn at least a portion of the coke and provide a regeneration flue gas stream comprising carbon monoxide (CO);
and
(b) contacting at least a portion of the regeneration flue gas stream with a second catalyst comprising a noble metal, or admixed with a combustion promoter comprising a noble metal, to combust at least a portion of the CO,
wherein, during step (b), the second catalyst is regenerated by contact with a second oxygen-containing regeneration gas stream.

1 more element

Dependencies are inferred from the claim text.

Integrated Regeneration of Non-Noble Metal Catalysts

Life of this patent

Integrated Regeneration of Non-Noble Metal Catalysts

Life of this patent

Abstract

Claims20