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Class Information
Number: 44/627
Name: Fuel and related compositions > Coal treating process or product thereof > Removal of undesirable > Ash or ash-former
Description: Subject matter wherein incombustible materials are removed from coal, generally noncarbonaceous, earthy, materials.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6632258 |
Coal beneficiation by gas agglomeration |
Oct. 14, 2003 |
| 6613110 |
Inhibition of reflective ash build-up in coal-fired furnaces |
Sep. 2, 2003 |
| 5888926 |
Process for forming a sorbent-metal complex by employing a sorbent precursor |
Mar. 30, 1999 |
| 5876622 |
Fluid, formulation and method for dust control and dewatering of particulate materials |
Mar. 2, 1999 |
| 5863456 |
Fluid, formulation and method for dust control and dewatering of particulate materials |
Jan. 26, 1999 |
| 5795484 |
Method and apparatus for dewatering |
Aug. 18, 1998 |
| 5637122 |
Electrostatic pyrite ash and toxic mineral separator |
Jun. 10, 1997 |
| 5575824 |
Coal preparation device |
Nov. 19, 1996 |
| 5350430 |
Oil/coal coprocessing in which agglomerated coal forms part of feedstock |
Sep. 27, 1994 |
| 5330671 |
Fluid, formulation and method for coal dust control |
Jul. 19, 1994 |
| 5312462 |
Moist caustic leaching of coal |
May. 17, 1994 |
| 5277368 |
Coal cleaning process |
Jan. 11, 1994 |
| 5192338 |
Coal ash modification and reduction |
Mar. 9, 1993 |
| 5190566 |
Incorporation of a coprocessing additive into coal/oil agglomerates |
Mar. 2, 1993 |
| 5189964 |
Process for burning high ash particulate fuel |
Mar. 2, 1993 |
| 5162050 |
Low-rank coal oil agglomeration product and process |
Nov. 10, 1992 |
| 5161694 |
Method for separating fine particles by selective hydrophobic coagulation |
Nov. 10, 1992 |
| 5147045 |
Particulate separations by electrostatic coalescence |
Sep. 15, 1992 |
| 5127586 |
Method of magnetic separation and apparatus therefore |
Jul. 7, 1992 |
| 5085764 |
Process for upgrading coal |
Feb. 4, 1992 |
| 5059307 |
Process for upgrading coal |
Oct. 22, 1991 |
| 5032146 |
Low-rank coal oil agglomeration |
Jul. 16, 1991 |
| 4966608 |
Process for removing pyritic sulfur from bituminous coals |
Oct. 30, 1990 |
| 4961756 |
Fluidized-bed combustion fuel |
Oct. 9, 1990 |
| 4946474 |
Process for beneficiation of coal by selective caking |
Aug. 7, 1990 |
| 4938864 |
Method for processing fine coal |
Jul. 3, 1990 |
| 4936045 |
Demineralization of coal |
Jun. 26, 1990 |
| 4915706 |
Coal-water fuel production |
Apr. 10, 1990 |
| 4889538 |
Coal agglomeration beneficiation with heavy hydrocarbon oils and utilization thereof in coal/heavy oil coprocessing |
Dec. 26, 1989 |
| 4881946 |
Process for the beneficiation of coal by selective caking |
Nov. 21, 1989 |
| 4874393 |
Method of producing fuel of relatively higher calorific value from low rank and oxidized coal |
Oct. 17, 1989 |
| 4854940 |
Method for providing improved solid fuels from agglomerated subbituminous coal |
Aug. 8, 1989 |
| 4832701 |
Process for the regeneration of an additive used to control emissions during the combustion of high sulfur fuel |
May. 23, 1989 |
| 4828686 |
Chemical conditioning of fine coal for improved flotation and pyrite rejection |
May. 9, 1989 |
| 4820313 |
Coal processing method and apparatus |
Apr. 11, 1989 |
| 4810258 |
Low rank coal or peat having impurities removed by a drying process |
Mar. 7, 1989 |
| 4804390 |
Process for removing mineral impurities from coals and oil shales |
Feb. 14, 1989 |
| 4802976 |
Method for recovering fine clean coal |
Feb. 7, 1989 |
| 4787918 |
Process for producing deep cleaned coal |
Nov. 29, 1988 |
| 4780112 |
Method for the continuous chemical reduction and removal of mineral matter contained in carbon structures |
Oct. 25, 1988 |
| 4762526 |
Process for deashing coal |
Aug. 9, 1988 |
| 4753033 |
Process for producing a clean hydrocarbon fuel from high calcium coal |
Jun. 28, 1988 |
| 4741741 |
Chemical beneficiation of coal |
May. 3, 1988 |
| 4725337 |
Method for drying low rank coals |
Feb. 16, 1988 |
| 4695371 |
Nonaqueous coal cleaning process |
Sep. 22, 1987 |
| 4676804 |
Coal cleaning by gaseous carbon dioxide conditioning and froth flotation |
Jun. 30, 1987 |
| 4661118 |
Method for oxidation of pyrite in coal to magnetite and low field magnetic separation thereof |
Apr. 28, 1987 |
| 4657561 |
Method of recovering fuel from coal ash |
Apr. 14, 1987 |
| 4655896 |
Apparatus for ferric ion treatment for removal of ash-forming mineral matter from coal |
Apr. 7, 1987 |
| 4619669 |
Method for increased mine recovery and upgrading of lignite |
Oct. 28, 1986 |
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