Furfural solvent extraction is used for upgrading (by dissolving aromatics) ?
Correct answer: B. Lubricating oils
- A. Naphtha
- B. Lubricating oils
- C. Wax
- D. Cracking feedstock
Explanation
Furfural selectively dissolves aromatic compounds from lubricating-oil fractions, leaving a more desirable paraffinic raffinate with improved viscosity index and stability. It is therefore used to upgrade lubricating oils.
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