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Process for the manufacture of lubricating oils

Patent ·
OSTI ID:6785104
; ; ;
A process is described for reducing the pour point of a hydrocarbon feedstock containing nitrogen and sulfur-containing compounds 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 hydrocarbon feedstock 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 at least a portion of the effluent from the hydrotreating zone to a stripping zone wherein 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 containing less than about 10 ppmw nitrogen-containing compounds based on nitrogen and less than about 20 ppmw sulfur-containing compounds based on sulfur to a dewaxing zone.
Assignee:
Amoco Corp., Chicago, IL
Patent Number(s):
US 4755279
OSTI ID:
6785104
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020500* -- Petroleum-- Products & By-Products
ADSORBENTS
AMMONIA
AROMATICS
BOROSILICATE GLASS
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
DESULFURIZATION
DEWAXING
EXTRACTION
GLASS
HYDRIDES
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
HYDROGENATION
LUBRICANTS
LUBRICATING OILS
MOLECULAR SIEVES
NITROGEN COMPOUNDS
NITROGEN HYDRIDES
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
POUR POINT
REMOVAL
SEPARATION PROCESSES
SOLVENT EXTRACTION
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS