Catalytic hydrodewaxing process with added ammonia in the production of lubricating oils
US4428825A · kind A · utility
21Cited by
36References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1982 |
| Grant date | Jan 31, 1984 |
| Priority date | — |
| Expiry date | Mar 11, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2300/70
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved lubricating oils are produced from waxy oils and the like by catalytically hydrodewaxing in the presence of added ammonia. Less hydrogen is consumed in the process, even at relatively high operating temperatures, and the resultant product is of increased viscosity index.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.