Saturation process for making lubricant base oils
US9809762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2015 |
| Grant date | Nov 7, 2017 |
| Priority date | — |
| Expiry date | Oct 28, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G65/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Systems and methods are provided for hydroprocessing a petroleum fraction, such as a bottoms fraction from a fuels hydrocracking process, to generate a lubricant base oil. The aromatic content of such a petroleum fraction can be reduced using a aromatic saturation stage with multiple catalyst beds, or alternatively using a reactor (or reactors) with multiple aromatic saturation stages. The catalysts in the various beds or stages can be selected to provide different types of aromatic saturation activity. An initial bed or stage can provide activity for saturation of 1-ring aromatics in the petroleum fraction. One or more subsequent beds or stages, operating at successively lower temperature, can then be used to reduce the multiple-ring aromatic content of the petroleum fraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.