Method of underground conversion of coal
US4662439A · kind A · utility
284Cited by
16References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 14, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | May 14, 2005 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/30
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of converting coal and other solid carbonaceous material to gaseous and liquid products by heating the coal in the presence of the gaseous effluent to a sufficient temperature for pyrolyzing the coal to produce liquid and gaseous products. Thereafter, further gasifying the coal to produce a gaseous effluent to be used in subsequent steps to produce liquid and gaseous products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.