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Process for the manufacture of lubricating oils

Patent ·
OSTI ID:5238865
; ;
A process for reducing the pour point of a hydrocarbon feedstock containing nitrogen and sulfur-containing compounds is described which comprises: passing the hydrocarbon feedstock to a solvent extraction zone wherein the hydrocarbon feedstock is extracted with a solvent to remove a portion of the aromatic compounds contained in the hydrocarbon and thereby form an extraction zone raffinate; passing at least a portion of the extraction zone raffinate to a hydrotreating zone wherein hydrogen is contacted with hydrocarbonfeedstock in the presence of a hydrotreating catalyst at hydrotreating conditions wherein a substantial portion of the nitrogen and sulfur-containing compounds are converted to hydrogen sulfide and ammonia to form a hydrotreating zone effluent; passing a least a portion if the effluent from the hydrotreating zone to a stripping zone where in hydrogen sulfide and ammonia are removed from the hydrotreating zone effluent to form a stripping zone effluent; passing at least a portion of the stripping zone effluent o a dewaxing zone.
Assignee:
Amoco Corp., Chicago, IL
Patent Number(s):
US 4728415
OSTI ID:
5238865
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020500* -- Petroleum-- Products & By-Products
023000 -- Petroleum-- Properties & Composition
33 ADVANCED PROPULSION SYSTEMS
330100 -- Internal Combustion Engines
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMMONIA
CATALYSTS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
DEWAXING
EFFICIENCY
ELEMENTS
ENGINES
EXTRACTION
HEAT ENGINES
HYDRIDES
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROGENATION
INTERNAL COMBUSTION ENGINES
LUBRICANTS
LUBRICATING OILS
LUBRICATION
MINERALS
NITROGEN
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
NONMETALS
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
POUR POINT
PRODUCTION
REMOVAL
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOLVENT EXTRACTION
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT