Process for removing nitrogen from shale oil
US4426280A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1982 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | Feb 9, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G17/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is provided a process for reduction of the nitrogen content of shale oil. The process comprises contacting shale oil with a low acid strength solvent in a first extraction zone, followed by contacting the shale oil with a high acid strength solvent in a second extraction zone. A portion of the high acid strength solvent containing extracted nitrogen-containing and non-nitrogen-containing compounds is passed to the first extraction zone and diluted to form low acid strength solvent, and at least a portion of the non-nitrogen-containing compounds redissolve into the shale oil in contact with the low acid strength solvent and are recovered. Thus, oil recovery is maximized at high nitrogen removal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.