Method of recovering coal in aqueous slurry form
US4132448A · kind A · utility
4Cited by
5References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1977 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Sep 6, 1997 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/28
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method of in-situ coal recovery in slurry form from a coal deposit by first contacting the coal with a gaseous mixture of an oxygen-containing gas containing vaporized NO.sub.2, then with an aqueous alkaline solution to slurry the coal, and then recovering the slurried coal from the deposit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.