Patent ID: 11932817
Assignee: CHEVRON PHILLIPS CHEMICAL COMPANY LP
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 19:
20. 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.