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Class Information
Number: 44/621
Name: Fuel and related compositions > Coal treating process or product thereof > Removal of undesirable
Description: Subject matter under subclasses 620 wherein the coal is purified.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7507083 |
Reducing mercury emissions from the burning of coal |
Mar. 24, 2009 |
| 7357903 |
Method for reducing NOx during combustion of coal in a burner |
Apr. 15, 2008 |
| 7198655 |
Method and apparatus for thermally upgrading carbonaceous materials |
Apr. 3, 2007 |
| 7101410 |
Method for the microbiological desulfurization of fossil fuels |
Sep. 5, 2006 |
| 6942707 |
Valorization of by-products in the ecological coal transformation |
Sep. 13, 2005 |
| 6863819 |
Water treatment method |
Mar. 8, 2005 |
| 6632258 |
Coal beneficiation by gas agglomeration |
Oct. 14, 2003 |
| 6599434 |
Fine coal recovering process |
Jul. 29, 2003 |
| 6447559 |
Treatment of coal |
Sep. 10, 2002 |
| 6156083 |
Coal reclamation systems |
Dec. 5, 2000 |
| 6156281 |
Process for removal of hazardous air pollutants from coal |
Dec. 5, 2000 |
| 5817282 |
Reduction of nitrogen oxides |
Oct. 6, 1998 |
| 5769908 |
Method and apparatus for reducing the by-product content of carbonaceous materials |
Jun. 23, 1998 |
| 5746787 |
Process for treating carbonaceous materials |
May. 5, 1998 |
| 5726056 |
Fuel product produced by demetalizing a fossil fuel with an enzyme |
Mar. 10, 1998 |
| 5676710 |
Coal preparation system |
Oct. 14, 1997 |
| 5656041 |
Method for detoxifying coal-tar deposits |
Aug. 12, 1997 |
| 5637122 |
Electrostatic pyrite ash and toxic mineral separator |
Jun. 10, 1997 |
| 5597475 |
DADMAC/vinyl trialkoxysilane copolymers for dewatering copper and taconite slurries in the mining industry |
Jan. 28, 1997 |
| 5575824 |
Coal preparation device |
Nov. 19, 1996 |
| 5554201 |
Thermal treated coal, and process and apparatus for preparing the same |
Sep. 10, 1996 |
| 5527365 |
Irreversible drying of carbonaceous fuels |
Jun. 18, 1996 |
| 5403365 |
Process for low mercury coal |
Apr. 4, 1995 |
| 5350430 |
Oil/coal coprocessing in which agglomerated coal forms part of feedstock |
Sep. 27, 1994 |
| 5296006 |
3-acrylamido-3-methylbutanoic acid copolymers as selective coal flocculants |
Mar. 22, 1994 |
| 5277368 |
Coal cleaning process |
Jan. 11, 1994 |
| 5236089 |
Method of beneficiating coal |
Aug. 17, 1993 |
| 5192338 |
Coal ash modification and reduction |
Mar. 9, 1993 |
| 5190566 |
Incorporation of a coprocessing additive into coal/oil agglomerates |
Mar. 2, 1993 |
| 5092909 |
Biodesulphurization process utilizing bacteria |
Mar. 3, 1992 |
| 5085764 |
Process for upgrading coal |
Feb. 4, 1992 |
| 5071447 |
Apparatus and process for steam treating carbonaceous material |
Dec. 10, 1991 |
| 5066310 |
Method for recovering light hydrocarbons from coal agglomerates |
Nov. 19, 1991 |
| 5059307 |
Process for upgrading coal |
Oct. 22, 1991 |
| 5022892 |
Fine coal cleaning via the micro-mag process |
Jun. 11, 1991 |
| 4936045 |
Demineralization of coal |
Jun. 26, 1990 |
| 4881946 |
Process for the beneficiation of coal by selective caking |
Nov. 21, 1989 |
| 4804390 |
Process for removing mineral impurities from coals and oil shales |
Feb. 14, 1989 |
| 4795037 |
Process for separating high ash coal from refuse |
Jan. 3, 1989 |
| 4780112 |
Method for the continuous chemical reduction and removal of mineral matter contained in carbon structures |
Oct. 25, 1988 |
| H478 |
Selective reduction of sodium in coal by water wash and ion exchange with tailored electrolyte |
Jun. 7, 1988 |
| 4743271 |
Process for producing a clean hydrocarbon fuel |
May. 10, 1988 |
| 4741741 |
Chemical beneficiation of coal |
May. 3, 1988 |
| 4735707 |
Removing mineral matter from solid carbonaceous fuels |
Apr. 5, 1988 |
| 4705530 |
Reduction of sodium in coal by water wash and ion exchange with a weak electrolyte |
Nov. 10, 1987 |
| 4705531 |
Reduction of sodium in coal by water wash followed by ion exchange within a pipeline |
Nov. 10, 1987 |
| 4695290 |
Integrated coal cleaning process with mixed acid regeneration |
Sep. 22, 1987 |
| 4676804 |
Coal cleaning by gaseous carbon dioxide conditioning and froth flotation |
Jun. 30, 1987 |
| 4671801 |
Method for the beneficiation, liquefaction and recovery of coal and other solid carbonaceous materials |
Jun. 9, 1987 |
| 4648962 |
Method of breaking down chemisorption bond of clay-containing heavy oil water emulsions |
Mar. 10, 1987 |
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