Methods and systems for retorting oil shale and upgrading the hydrocarbons obtained therefrom
US10858592B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Jun 6, 2018 |
| Grant date | Dec 8, 2020 |
| Priority date | — |
| Expiry date | Aug 7, 2039 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/133
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Optimized, heat-integrated methods and systems are provided to produce multiple, high-value products from oil shale, while minimizing overall energy and water usage. A method for producing multiple products from oil shale comprises: feeding raw oil shale into a heated retorting unit, to convert kerogen into a retorted stream; introducing the retorted stream to a distillation column to generate a high-cetane diesel stream, an α-olefin-containing chemical stream, an asphalt/asphalt additive stream, and an overhead gas stream, wherein heat contained in the retorted stream is harnessed as distillation energy; separating the overhead gas stream into a fuel gas stream and a purge gas stream; combusting the fuel gas stream to generate hot flue gas; heating the purge gas with hot flue gas; feeding the heated purge gas directly to the heated retorting unit; and recovering the high-cetane diesel stream, the α-olefin-containing chemical stream, and the asphalt/asphalt additive stream as products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.