Solvent extraction process
Patent
·
OSTI ID:5778307
A solvent refining process is disclosed utilizing n-methyl-2-pyrrolidone as solvent in which primary extract from the extraction zone is cooled to form a secondary raffinate and secondary extract and the secondary and primary raffinates are blended to produce an increased yield of product of desired quality. In a preferred embodiment of the process, the lubricating oil feedstock to the process is first contacted with a stripping medium previously used in the process for the recovery of solvent from at least one of the product streams whereby solvent contained in said stripping medium is recovered therefrom.
- Assignee:
- Texaco Inc
- Patent Number(s):
- US 4311583
- OSTI ID:
- 5778307
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020500* -- Petroleum-- Products & By-Products
AMIDES
AZOLES
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
LACTAMS
LUBRICANTS
LUBRICATING OILS
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PYRROLES
PYRROLIDONES
RECYCLING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
020500* -- Petroleum-- Products & By-Products
AMIDES
AZOLES
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
LACTAMS
LUBRICANTS
LUBRICATING OILS
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PYRROLES
PYRROLIDONES
RECYCLING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS