Fixed-bed/moving-bed two stage catalytic reforming with recycle of hydrogen-rich stream to both stages
Patent
·
OSTI ID:6228630
A process is described for catalytically reforming a gasoline boiling range hydrocarbon reactant stream in the presence of hydrogen in a reforming process unit comprised of a plurality of serially connected reforming zones wherein each of the reforming zones contains a reforming catalyst comprised of one or more Group VIII noble metals on a refractory support, the process comprising: (a) reforming the reactant stream in a first reforming stage comprised of one or more serially connected reforming zones containing a fixed-bed of catalyst particles comprised of one or more Group VIII noble metals on a refractory support, which one or more reforming zones are operated at reforming conditions which includes a pressure of about 100 to 500 psig, thereby producing a first effluent stream; (b) passing said first effluent stream to a second reforming stage operated at a pressure which is at least about 50 psig lower than that of the first reforming stage, which second reforming stage is comprised of one or more serially connected reforming zones which are operated in a moving bed continuous catalyst regeneration mode, wherein the catalyst continually descends through one or more reforming zones, exits, and is passed to a regeneration zone where at least a portion of any accumulated carbon is burned-off, and wherein the regenerated catalyst is recycled back to the one or more reforming zones; (c) passing the effluent stream from said second stage reforming to a separation zone wherein at least a portion of a hydrogen-rich gaseous stream is separated and recycled to the lead reforming zone of said first stage reforming; and (d) collecting the remaining liquid reformate.
- Assignee:
- Exxon Research and Engineering Co., Florham Park, NJ (United States)
- Patent Number(s):
- US 5221463; A
- Application Number:
- PPN: US 7-805333
- OSTI ID:
- 6228630
- Country of Publication:
- United States
- Language:
- English
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