Ethanolamine in a method of recovering coal in aqueous slurry form
US4191425A · kind A · utility
3Cited by
6References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1978 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Dec 20, 1998 |
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. The particular aqueous alkaline solution disclosed herein contains ethanolamine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.