Method of recovering coal values by combining underground coal gasification with surface coal liquefaction
US4614234A · kind A · utility
2Cited by
11References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1985 |
| Grant date | Sep 30, 1986 |
| Priority date | — |
| Expiry date | Mar 14, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S585/943
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Hot gases from an underground coal gasification operation are used to pyrolyze mined coal, which is subsequently used for surface steam generation, the steam being utilized in the underground coal gasification operation. Valuable gases and hydrocarbon liquids are obtained from the process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.