Loading...
Please wait, while we are loading the content...
Similar Documents
Method of extracting coal from a coal refuse pile
| Content Provider | United States Department of Energy Office of Scientific and Technical Information (OSTI.GOV) |
|---|---|
| Organization | National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV |
| Abstract | A method of extracting coal from a coal refuse pile comprises soaking the coal refuse pile with an aqueous alkali solution and distributing an oxygen-containing gas throughout the coal refuse pile for a time period sufficient to effect oxidation of coal contained in the coal refuse pile. The method further comprises leaching the coal refuse pile with an aqueous alkali solution to solubilize and extract the oxidized coal as alkali salts of humic acids and collecting the resulting solution containing the alkali salts of humic acids. Calcium hydroxide may be added to the solution of alkali salts of humic acid to form precipitated humates useable as a low-ash, low-sulfur solid fuel. |
| Related Links | https://www.osti.gov/biblio/867922 |
| File Format | |
| Patent Number | US 5035722 |
| Language | English |
| Publisher Date | 1991-01-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | method extracting coal refuse pile comprises soaking aqueous alkali solution distributing oxygencontaining gas throughout time period sufficient effect oxidation contained leaching solubilize extract oxidized salts humic acids collecting resulting containing calcium hydroxide added acid form precipitated humates useable lowash lowsulfur solid fuel refuse pile coal refuse aqueous alkali resulting solution alkali salts humic acid solid fuel period sufficient oxygencontaining gas solution containing time period containing gas calcium hydroxide alkali solution comprises leaching extracting coal alkali salt |
| Content Type | Text |
| Resource Type | Patent |
