Pulsed retorting with continuous shale oil upgrading
US4532991A · kind A · utility
30Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1984 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Mar 22, 2004 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/247
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
One or more in situ oil shale retorts are alternately operated in a combustion mode and a purge mode with a steam or water purge to produce a greater yield of shale oil. Hydrogen-rich off gases emitted during purging are mixed with the shale oil in a reactor in the presence of a catalyst, after being stripped of carbon dioxide, to produce a high quality shale oil. The reactor off gases, purge mode off gases, and/or hydrogen gases can also be used as the purge gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.