Dual solvent refining process
Patent
·
OSTI ID:5143301
A dual solvent refining process is claimed for solvent refining petroleum based lubricating oil stocks with n-methyl-2-pyrrolidone as selective solvent for aromatic oils wherein a highly paraffinic oil having a narrow boiling range approximating the boiling point of n-methyl-2-pyrrolidone is employed as a backwash solvent. The process of the invention results in an increased yield of refined lubricating oil stock of a predetermined quality and simplifies separation of the solvents from the extract and raffinate oil fractions.
- Assignee:
- Texaco Inc
- Patent Number(s):
- US 4325818
- OSTI ID:
- 5143301
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020500* -- Petroleum-- Products & By-Products
AMIDES
AZOLES
EXTRACTION
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
LACTAMS
LUBRICANTS
LUBRICATING OILS
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PROCESSING
PYRROLES
PYRROLIDONES
REFINING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SOLVENTS
020500* -- Petroleum-- Products & By-Products
AMIDES
AZOLES
EXTRACTION
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
LACTAMS
LUBRICANTS
LUBRICATING OILS
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM PRODUCTS
PROCESSING
PYRROLES
PYRROLIDONES
REFINING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENT PROPERTIES
SOLVENTS