Hydrocracking catalyst of improved activity
A process is described for refining a hydrocarbon feedstock containing organonitrogen components, organosulfur components or a mixture thereof comprising: (a) contacting the feedstock with a hydrogen-containing gas in a hydrotreating zone under hydrotreating conditions in the presence of a hydrotreating catalyst comprising a Group VIB metal component and a Group VIII metal component such that a substantial proportion of the organonitrogen components, organosulfur components or mixture thereof is converted to ammonia, hydrogen sulfide or a mixture thereof; (b) contacting substantially all of the effluent from the hydrotreating zone with molecular hydrogen in a first hydrocracking zone in the presence of a first hydrocracking catalyst comprising a zeolite and a hydrogenation component to produce a hydrocracking product of substantially lower boiling point; (c) separating the hydrocracking product into a higher boiling fraction and a lower boiling fraction; (d) contacting the higher boiling fraction with molecular hydrogen in a second hydrocracking zone under hydrocracking conditions in the presence of a second hydrocracking catalyst to convert the higher boiling fraction into lower boiling products, wherein the second hydrocracking catalyst comprises: (1) a crystalline aluminosilicate Y zeolite having a silica-to-alumina mode ratio of about 6.2 or above, the zeolite having been ion-exchanged with rare earth-containing cations and Group VIII noble metal-containing cations; (2) a porous, inorganic refractory oxide intimately mixed with the zeolite; and (3) between about 4.5 weight percent and about 6.0 weight percent water based on the total weight of the second hydrocracking catalyst.
- Assignee:
- Union Oil Co. of California, Los Angeles, CA
- Patent Number(s):
- US 4689137
- OSTI ID:
- 6069308
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
AMMONIA
BOILING POINTS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DISPERSIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDRIDES
HYDROCRACKING
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INORGANIC ION EXCHANGERS
ION EXCHANGE
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
MIXTURES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PHYSICAL PROPERTIES
PROCESSING
PYROLYSIS
QUANTITY RATIO
REFINING
SILICATES
SILICON COMPOUNDS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ZEOLITES