Back to results
US 11,932,817 B1Granted
AROMAX® process for improved selectivity and heavier feeds processing
AssigneeChevron Phillips Chemical Company LP
InventorsRyan W. Snell, Vincent D. McGahee
Life of this patent
Estimating the term…
Abstract
The present disclosure generally relates to systems, methods, and processes for catalytic hydrocarbon reformation.
Claims20
A process for operating a reforming reactor system, the process comprising:
- operating a first series of reactors, wherein the first series of reactors comprises a plurality of reactors, and wherein each reactor within the plurality of reactors in the first series of reactors contains a catalyst comprising at least one Group VIII metal, a zeolitic support, and at least one halogen and capable of catalyzing the reaction of at least a portion of hydrocarbons in a hydrocarbon feed into aromatic hydrocarbons, thus providing a first reactor series effluent comprising the aromatic hydrocarbons, unreacted hydrocarbons, and hydrogen;
- separating hydrogen from the first reactor series effluent, thus providing hydrogen and a reduced-hydrogen first reactor series effluent;
- and
- operating a second series of reactors;
- wherein the second series of reactors comprises a plurality of reactors,
- wherein each reactor within the plurality of reactors in the second series of reactors contains a catalyst comprising at least one Group VIII metal, a zeolitic support, and at least one halogen capable of converting unreacted hydrocarbons in the reduced-hydrogen first reactor series effluent into the aromatic hydrocarbons, and
- wherein a fouling rate of the catalyst in any one of the reactors within the plurality of reactors in the first series of reactors is less than a fouling rate of the catalyst in any one of the reactors within the plurality of reactors in the second series of reactors.
4 more elements
A reforming reactor system comprising:
- a first reactor series comprising a plurality of reactors, wherein each of the reactors within the plurality of reactors of the first reactor series contains a catalyst comprising at least one Group VIII metal, a zeolitic support, and at least one halogen and capable of catalyzing the reaction of at least a portion of a hydrocarbon in a hydrocarbon feed into an aromatic hydrocarbon, thus providing a first reactor series effluent comprising the aromatic hydrocarbon, unreacted hydrocarbon, and hydrogen;
- a low-pressure separator configured to separate hydrogen from the first reactor series effluent, thus providing hydrogen and a reduced-hydrogen first reactor series effluent;
- and
- a second reactor series comprising a plurality of reactors, and
- an apparatus configured to separate a non-convertible C6 hydrocarbon from the reduced-hydrogen first reactor series effluent to produce a second hydrocarbon stream,
- wherein the second hydrocarbon stream comprises a greater concentration of convertible C6 hydrocarbons than the reduced-hydrogen first reactor series effluent, and (a) a charge pump operable to introduce the second hydrocarbon stream to the second reactor series;
- (b) a heat exchange apparatus configured to transfer heat between the second hydrocarbon stream and the first reactor series effluent prior to introduction of the second hydrocarbon stream into the second reactor series and prior to separating hydrogen from the first reactor series effluent via the hydrogen separation apparatus;
- or both (a) and (b), and
- wherein each reactor of the second reactor series contains a catalyst comprising at least one Group VIII metal, a zeolitic support, and at least one halogen and capable of catalyzing the reaction of at least a portion of the unreacted hydrocarbon in the reduced-hydrogen first reactor series effluent into the aromatic hydrocarbon.
6 more elements
A process for operating a reforming reactor system, the process comprising:
- operating a plurality of reactors in a reactor series to produce a reactor series effluent comprising an aromatic hydrocarbon from a hydrocarbon feed comprising a hydrocarbon, wherein operating the plurality of reactors comprises directing a portion of the hydrocarbon feed to form a supplemental feed, introducing the supplemental feed into at least one reactor downstream of the first reactor in the reactor series, thus bypassing the first reactor with the portion of the hydrocarbon feed, and introducing a remainder portion of the hydrocarbon feed into the first reactor of the reactor series, wherein each of the reactors within the plurality of reactors contains a catalyst comprising at least one Group VIII metal, a zeolitic support, and at least one halogen and capable of catalyzing the reaction of at least a portion of the hydrocarbon in the hydrocarbon feed into the aromatic hydrocarbon, thus providing the reactor series effluent.
A process for operating a reforming reactor system, the process comprising:
- operating a first series of reactors, wherein the first series of reactors comprises a plurality of reactors, and wherein each reactor within the plurality of reactors in the first series of reactors contains a catalyst comprising at least one Group VIII metal, a zeolitic support, and at least one halogen and capable of catalyzing the reaction of at least a portion of hydrocarbons in a hydrocarbon feed into aromatic hydrocarbons, thus providing a first reactor series effluent comprising the aromatic hydrocarbons, unreacted hydrocarbons, and hydrogen;
- separating hydrogen from the first reactor series effluent, thus providing hydrogen and a reduced-hydrogen first reactor series effluent;
- and
- operating a second series of reactors;
- wherein the second series of reactors comprises a plurality of reactors,
- wherein each reactor within the plurality of reactors in the second series of reactors contains a catalyst comprising at least one Group VIII metal, a zeolitic support, and at least one halogen capable of converting unreacted hydrocarbons in the reduced-hydrogen first reactor series effluent into the aromatic hydrocarbons,
- wherein the reduced-hydrogen first reactor series effluent comprises a non-convertible C6 hydrocarbon, and
- wherein the process further comprises:
- separating the non-convertible C6 hydrocarbon from the reduced-hydrogen first reactor series effluent to produce a second hydrocarbon stream;
- introducing the second hydrocarbon stream to the second series of reactors via a charge pump, wherein the second hydrocarbon stream comprises a greater concentration of convertible C6 hydrocarbons than the reduced-hydrogen first reactor series effluent;
- and
- heating the second hydrocarbon stream via heat exchange with the first reactor series effluent prior to introduction of the second hydrocarbon stream into the second series of reactors and prior to separating hydrogen from the first reactor series effluent.
9 more elements
Dependencies are inferred from the claim text.