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Single-stage hydrotreating process for converting pitch to conversion process feedstock

Patent ·
OSTI ID:6227687
;
A process is provided for converting pitch-containing residual hydrocarbon oils containing asphaltenes, sulfur and nitrogen compounds and heavy metals into distillate fuels, which comprises: mixing from about 5-60% v residual oils with catalytic cracking feedstock and with hydrogen and passing said mixture downwardly into a hydrotreating zone over a stacked-bed catalyst under conditions suitable to convert from about 45-75% of the sulfur compounds present in the mixture to H/sub 2/S; wherein said stacked bed comprises an upper bed consisting of from about 15-85% v, basis total catalyst, of a high-activity hydrotreating catalyst which contains from about 2-4% w molybdenum and from about 2-4% w phosphorus supported on a carrier consisting mostly of alumina, and a lower bed of a high-activity, hydrodesulfurization catalyst consisting of from about 2-4% w cobalt and/or nickel, from about 8-15% w molybdenum and less than about 0.5% w phosphorus supported on a carrier consisting mostly of alumina; and separating the reaction product from said hydrotreating zone into a hydrogenrich gas and a liquid residue-containing oil having reduced heavy metal content and being suitable as a catalytic cracking feedstock.
Assignee:
Shell Oil Co.
Patent Number(s):
US 4534852
OSTI ID:
6227687
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
ASPHALTENES
ASPHALTS
BITUMENS
CATALYST SUPPORTS
CATALYSTS
CATALYTIC CRACKING
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL FEEDSTOCKS
CHEMICAL REACTIONS
COBALT
CRACKING
DECOMPOSITION
DEMETALLIZATION
DESULFURIZATION
DISTILLATES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROCRACKING
HYDROGEN
METALS
MOLYBDENUM
NICKEL
NITROGEN
NONMETALS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM RESIDUES
PHOSPHORUS
PITCHES
PRODUCTION
PYROLYSIS
SEPARATION PROCESSES
SULFUR CONTENT
TAR
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS