Coal disaggregation by basic aqueous solution for slurry recovery
US4032193A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1974 |
| Grant date | Jun 28, 1977 |
| Priority date | — |
| Expiry date | Mar 28, 1994 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B43/28
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
This invention is a process for treating an underground formation of coal by contacting the coal with a basic aqueous solution for a time sufficient to disintegrate at least a portion of the coal formation. Subsequently, at least some of the disintegrated material is removed to create permeability in the coal formation. The coal is then treated with a heat carrying fluid to recover energy values from the coal. Another aspect of this invention is a process for slurry mining coal which comprises contacting the coal with the basic aqueous solution for a time sufficient to disintegrate the coal and form a slurry, then conveying said slurry to a receiving terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.