Patent ID: 11859136
Assignee: EXXONMOBIL CHEMICAL PATENTS INC.
Field: Chemical engineering (Chemistry)
Classification: CPC C  B  Y | IPC B  C

Claim 0:
1. A process for upgrading a hydrocarbon, comprising:
(I) contacting a hydrocarbon-containing feed with a catalyst comprising a Group 8-10 element disposed on a support to effect one or more of dehydrogenation, dehydroaromatization, and dehydrocyclization of at least a portion of the hydrocarbon-containing feed to produce a coked catalyst and an effluent comprising one or more upgraded hydrocarbons and molecular hydrogen, wherein:
the hydrocarbon-containing feed comprises one or more of C2-C16 linear or branched alkanes, or one or more of C4-C16 cyclic alkalies, or one or more C8-C16 alkyl aromatics, or a mixture thereof;
the hydrocarbon-containing teed and the catalyst are contacted at a temperature in a range from 300° C. to 900° C. under a hydrocarbon partial pressure of at least 20 kPa-absolute, wherein the hydrocarbon partial pressure is the total partial pressure of any C2-C16 alkanes, any C4-C16 cyclic alkanes, and any C8-C16 alkyl aromatics in the hydrocarbon- containing feed;
the hydrocarbon-containing feed and the catalyst are contacted in a presence of steam at an amount from 0.1 vol % to 50 vol %, based on a total volume of any C2-C16 alkanes, any C4-C16 cyclic alkanes, and any C8-C16 alkyl aromatics in the hydrocarbon-containing feed;
the catalyst comprises from 0.001 wt % to 6 wt % of the Group 8-10 element based. on the weight of the support; and
the one or more upgraded hydrocarbons comprise at least one of a dehydrogenated hydrocarbon, a dehydroaromatized hydrocarbon, and a dehydrocyclized hydrocarbon;
(II) contacting at least a portion of the coked catalyst with an oxidant to effect combustion of at least a portion of the coke to produce a regenerated catalyst lean in coke and a combustion gas, wherein at least a portion of the Group 8-10 element in the regenerated catalyst is at a higher oxidized state as compared to the Group 8-10 element in the catalyst contacted with the hydrocarbon-containing feed;
(IIa) contacting at least a portion of the regenerated catalyst with a reducing gas to produce a regenerated and reduced catalyst, wherein at a least a portion of the Group 8-10 element in the regenerated and reduced catalyst is reduced to a lower oxidation state as compared to the Group 8-10 element in the regenerated catalyst; and
(III) contacting an additional quantity of the hydrocarbon-containing feed with at least a portion of the regenerated and reduced catalyst to produce a re-coked catalyst and additional effluent, wherein a cycle time from the contacting the hydrocarbon-containing feed with the catalyst in step (I) to the contacting the additional quantity of the hydrocarbon-containing feed with the regenerated and reduced catalyst in step (III) is ≤1 hour.