Coal liquefaction with coal tar solvent
US4629554A · kind A · utility
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16References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1985 |
| Grant date | Dec 16, 1986 |
| Priority date | — |
| Expiry date | Sep 19, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/042
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of liquefying coal in which coal is mixed with a process solvent comprising at least partially hydrogenated coal tar material to produce a coal-solvent slurry. This slurry is treated under coal-liquefying conditions, preferably including a hydrogen atmosphere and elevated temperatures, to produce a solution containing coal liquefaction products. These products are recovered from the solution. Recovered, process-derived solvent material may be recycled in order to supplement the at least partially hydrogenated coal tar material as an ingredient of the process solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.