Catalyst inventory control in an ebullated bed process
This patent describes an improved method of maintaining a selected weight of catalyst in a reactor in a continuous process for treating a fluent hydrocarbon feedstock with a hydrogen-containing gas at elevated catalytic reaction temperatures and pressures in the presence of a bed of particulate solid catalyst. The process comprises introducing the hydrogen-containing gas and feedstock into the lower end of a generally vertical catalyst containing reaction vessel at sufficient velocity whereby the catalyst is placed in random motion within the fluent hydrocarbon. The catalyst bed is expanded to a volume greater than its static volume. The mixture of feedstock, gas and catalyst constitutes a turbulent zone from which zone aged catalyst is removed and fresh catalyst is added. The upper portion of the turbulent zone is defined by an interface with a substantially catalyst depleted zone from which zone hydrocarbon is removed.
- Assignee:
- Texaco Inc., White Plains, NY
- Patent Number(s):
- US 4902407; A
- Application Number:
- PPN: US 7-204318A
- OSTI ID:
- 6975979
- Resource Relation:
- Patent File Date: 9 Jun 1988
- Country of Publication:
- United States
- Language:
- English
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