Liquid yield from pyrolysis of coal liquefaction products
US4244805A · kind A · utility
3Cited by
2References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1979 |
| Grant date | Jan 13, 1981 |
| Priority date | — |
| Expiry date | Jun 5, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G1/002
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The quantity and quality of liquids produced from solid coal can be enhanced by a process comprising a liquefaction zone and a pyrolysis reactor, preferably a fluid coking zone, wherein the heavy liquids obtained in the pyrolysis reactor, e.g., 1000.degree. F.+ materials having a Conradson Carbon content of at least 15 wt. % are recycled to the liquefaction zone, rather than to the pyrolysis reactor, for further treatment under hydrogenation conditions and, consequently, conversion of the heavy liquids to lower boiling liquids which may be removed from the pyrolysis reactor feed by distillation is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.