Process for regenerating spent heavy hydrocarbon hydroprocessing catalyst
Patent
·
OSTI ID:5787580
This patent describes a process for regenerating a metals contaminated spent hydrocarbon hydroprocessing catalyst with a total containment metals build-up of greater than 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.; impregnating the partially decoked catalyst with a Group IIA metal-containing impregnation solution such that the impregnated partially decoked catalyst contains from about 0.1 to about 20.0 wt. % of the Group IIA metal calculated as the oxide and based on the fresh weight of the spent catalyst; and decoking the impregnated catalyst in a final coke-burning step wherein the impregnated 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 4994423
- Application Number:
- PPN: US 7-529192
- OSTI ID:
- 5787580
- Country of Publication:
- United States
- Language:
- English
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