Solvent recovery process for n-methyl-2-pyrrolidone in hydrocarbon extraction
Patent
·
OSTI ID:5326521
N-methyl-2-pyrrolidone is recovered from the raffinate and extract phases produced by its use in hydrocarbon extraction processes, particularly lube oil extraction, through the use of flash evaporation and/or distillation followed by gas stripping. Water buildup in the recovered solvent is prevented by employing solvent dehydration means in the solvent recovery line after gas stripping. Proper control of process parameters enables the dehydration means to remove excess water without requiring additional heat input to the process.
- Assignee:
- Exxon Research and Engineering Co.
- Patent Number(s):
- US 4057491
- OSTI ID:
- 5326521
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020400* -- Petroleum-- Processing
AMIDES
AZOLES
EXTRACTION
HETEROCYCLIC COMPOUNDS
LACTAMS
LUBRICANTS
LUBRICATING OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SOLVENTS
PETROLEUM PRODUCTS
PURIFICATION
PYRROLES
PYRROLIDONES
RECOVERY
REMOVAL
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
WATER REMOVAL
020400* -- Petroleum-- Processing
AMIDES
AZOLES
EXTRACTION
HETEROCYCLIC COMPOUNDS
LACTAMS
LUBRICANTS
LUBRICATING OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SOLVENTS
PETROLEUM PRODUCTS
PURIFICATION
PYRROLES
PYRROLIDONES
RECOVERY
REMOVAL
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
WATER REMOVAL