Process for increasing Bright Stock raffinate oil production

Patent · Tue Jun 03 04:00:00 EDT 1986

OSTI ID:5476995

Bristow, D J; Achia, B U; Evers, L J

A process is described for increasing the amount of Bright Stock raffinate oil derived from the solvent extraction of deasphalted lube oil involving the steps of: (a) extracting a vacuum residuum with a low molecular weight alkane hydrocarbon solvent resulting in a deasphalted lube oil solution and asphaltic residue; (b) separating the deasphalted lube oil and the residue; (c) separating the hydrocarbon solvent from the deasphalted lube oil; (d) extracting the deasphalted lube oil obtained from step (c) with an aromatics solvent resulting in a Bright Stock raffinate oil solution and a extract oil solution, the extract oil solution comprised of dissolved aromatics and recoverable raffinate; (e) separating the raffinate solution from the extract oil solution obtained from step (d); and (f) separating the aromatics solvent from the extract oil solution obtained from step (e); in which the improvement comprises the steps of: (g) recycling the extract oil from which the aromatics solvent has been removed, obtained from step (f), to step (a) and combining the extract oil with the vacuum residuum in a 10-20 LV %, based on the residuum, prior to the deasphalting.

• Assignee: Exxon Research and Engineering Co., Florham Park, NJ
• Patent Number(s): US 4592832
• OSTI ID: 5476995
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020500* -- Petroleum-- Products & By-Products
ALKANES
AROMATICS
DEASPHALTING
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
HYDROCARBONS
LUBRICANTS
LUBRICATING OILS
MOLECULAR WEIGHT
OILS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PETROLEUM RESIDUES
RECYCLING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SOLVENTS