Three-catalyst process for the hydrotreating of heavy hydrocarbon streams
There is disclosed a process for hydrotreating a heavy hydrocarbon stream containing metals, asphaltenes, nitrogen compounds, and sulfur compounds to reduce the contents of these contaminants. The process comprises contacting said stream in the presence of hydrogen and under suitable hydrotreating conditions in sequence with a first catalyst in a first reaction zone, a second catalyst in a second reaction zone, and a third catalyst in a third reaction zone. The first catalyst comprises a Group VIB metal and/or a Group VIII metal on a porous inorganic oxide support; the second catalyst consists essentially of at least one hydrogenation metal selected from Group VIB deposed on a support material comprising alumina; and the third catalyst comprises a hydrogenating component comprising molybdenum, chromium, and cobalt on a large-pore, catalytically-active alumina. Each catalyst has specific physical properties.
- Assignee:
- Standard Oil Company (Indiana)
- Patent Number(s):
- US 4431525
- OSTI ID:
- 6775301
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMIUM COMPOUNDS
COBALT COMPOUNDS
DEASPHALTING
DEMETALLIZATION
DENITRIFICATION
DESULFURIZATION
ELEMENTS
EXTRACTION
HYDROCARBONS
METALS
MOLYBDENUM COMPOUNDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUANTITY RATIO
SEPARATION PROCESSES
TRANSITION ELEMENT COMPOUNDS
VISCOSITY