Lube base oil manufacturing process utilizing refined oil fraction of waste lubricant, and lube base oil manufactured thereby
US12421462B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Mar 21, 2024 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Mar 21, 2044 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of recycling waste lubricant. The method includes providing a waste lubricant-derived oil fraction, pretreating the waste lubricant-derived oil fraction, and hydrocracking the pretreated waste lubricant-derived oil fraction. The method has economic advantages in that waste lubricant can be recycled into fuel oil and high-grade lube base oil with a relatively high yield compared to a lube base oil manufacturing process utilizing only unconverted oil as a feedstock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.