Extraction and upgrading of fossil fuels using fused caustic and acid solutions
US4545891A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 1983 |
| Grant date | Oct 8, 1985 |
| Priority date | — |
| Expiry date | Mar 10, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A crushed hydrocarbon-bearing material containing hydrocarbon and foreign mineral constituents is dispersed in fused alkali metal caustic to remove the sulfur content and release the foreign mineral matter from the hydrocarbon material for recovery and/or upgrading of the hydrocarbon content. The process permits recovery of 80-95% of the available kerogen or other hydrocarbon in a mineral matrix such as oil shale rock and conditions a solid fossil fuel such as coal, as well as the kerogen or other hydrocarbon released from the mineral matrix, for removal of substantially all remaining ash and other foreign mineral matter by subsequent washing of the hydrocarbon product in an aqueous solution of acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.