Simultaneous deasphalting-extraction process

Patent · Tue Nov 14 04:00:00 EST 1978

OSTI ID:6444988

Bushnell, J D; Glivicky, A P; Leighton, M D; Sankey, B M

An asphalt containing mineral oil is simultaneously deasphalted and extracted in a combination zone by contacting the oil with a solvent comprising N-methyl-2-pyrrolidone (NMP) containing from 0 to 5 LV% water and a light hydrocarbon to produce a raffinate the desired oil, most of the hydrocarbon solvent and some NMP. The raffinate is then passed to a reduced pressure zone to remove most of the hydrocarbon solvent therefrom. The remaining raffinate oil and NMP solution is then chilled to produce bulk liquid-liquid immiscibility between the oil and NMP. The chilled oil and NMP are then passed to a settling zone wherein the NMP is separated from the oil and recycled back into the combination zone.

• Assignee: Exxon Research and Engineering Co.
• Patent Number(s): US 4125458
• OSTI ID: 6444988
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
04 OIL SHALES AND TAR SANDS
040402 -- Oil Shales & Tar Sands-- Surface Methods
ALKANES
AMIDES
ASPHALTS
AZOLES
BITUMENS
DISPERSIONS
EXTRACTION
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
LACTAMS
MINERAL OILS
MIXTURES
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SOLVENTS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PROPANE
PURIFICATION
PYRROLES
PYRROLIDONES
REMOVAL
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS
TAR
WATER