Process for regenerating spent heavy hydrocarbon hydroprocessing catalyst
Patent
·
OSTI ID:5434020
This patent describes a process for regenerating a metals contaminated spent hydrocarbon hydroprocessing catalyst with a total contaminant metals build-up of greater than about 4 wt.% nickel plus vanadium, based on the total weight of fresh catalyst. It comprises: partially decoking the catalyst in an initial coke-burning step wherein the catalyst is contacted with an oxygen-containing gas at a temperature ranging from about 400{degrees} F. to about 700{degrees} F.; incorporating at least one rare earth metal with the partially decoked catalyst, such that the partially decoked catalyst contains from about 0.1 to 20.0 wt.% of the rare earth metal calculated as the elemental metal and based on the fresh weight of the spent catalyst; and decoking the rare earth metal-containing catalyst in a final coke-burning step wherein the rare earth metal-containing catalyst is contacted with an oxygen-containing gas at a temperature of about 600{degrees} F. to about 1400{degrees} F.
- Assignee:
- Amoco Corp., Chicago, IL (USA)
- Patent Number(s):
- A; US 4997779
- Application Number:
- PPN: US 7-541069
- OSTI ID:
- 5434020
- Country of Publication:
- United States
- Language:
- English
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