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US 2026/0258308 A1Published application
Aromatic and polar compounds removal in lube feedstocks by counter current liquid-liquid extraction using dihydrolevoglucosenone as a solvent
AssigneeExxonMobil Technology and Engineering Company
InventorsToufic Aridi, Darden Steve Sinclair, Gaither M. Phillips, Christopher J. Wheeler
Life of this patent
Estimating the term…
Abstract
A method may include: introducing a stream comprising a vacuum gas oil into a liquid-liquid extraction unit; contacting the vacuum gas oil with a dihydrolevoglucosenone solvent to extract a portion of aromatic compounds from the vacuum gas oil to produce a raffinate stream with reduced aromatic compound concentration; and dewaxing the raffinate stream to form a base stock.
Claims23
A method comprising:
- introducing a stream comprising a vacuum gas oil into a liquid-liquid extraction unit;
- contacting the vacuum gas oil with a dihydrolevoglucosenone solvent to extract a portion of aromatic compounds from the vacuum gas oil to produce a raffinate stream with reduced aromatic compound concentration;
- and
- dewaxing the raffinate stream to form a base stock.
1 more element
(canceled)
A method comprising:
- thermally cracking a hydrocarbon feedstock to produce a cracked product stream;
- separating at least a portion of the cracked product stream to form a lubricant boiling range fraction of the cracked product stream;
- deasphalting at least a portion of the lubricant boiling range fraction to form a deasphalted oil;
- introducing the deasphalted oil into a liquid-liquid extraction unit;
- contacting the deasphalted oil with a dihydrolevoglucosenone solvent to extract a portion of aromatic compounds from the deasphalted oil to produce a raffinate stream with reduced aromatic compound concentration;
- and
- dewaxing the raffinate stream to form a base stock.
4 more elements
(canceled)
-22. (canceled)
Dependencies are inferred from the claim text.