Process for preparing basestocks having high VI
US7282137B2 · kind B2 · utility
9Cited by
88References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 3, 2003 |
| Grant date | Oct 16, 2007 |
| Priority date | — |
| Expiry date | Oct 17, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2060/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for preparing high VI lubricating oil basestocks comprising hydrotreating, hydrodewaxing and optionally hydrofinishing. The hydrotreating step is under conditions such that the amount of conversion to 343° C. minus is less than 5 wt. % of the feedstock and the VI increase is less than 4 VI over the feedstock. Hydrodewaxing uses a low alpha catalyst and hydrofinishing is accomplished with a catalyst based on the M41S family.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.