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| Number | Title | Issue Date |
| 7497929 | Pyrolytic conversion of scrap tires to carbon products A char containing less than 5% volatile matter is produced by pryolyzing shredded scrap vehicle tires and other rubber scrap material in an externally heated retort until the rubber is completely decomposed and until the temperature of the gases produced by the pyro... | 03/03/2009 |
| 7347052 | Methods and systems for processing uncalcined coke Methods and systems for processing uncalcined coke are provided. The methods and systems provide for combusting effluent gas from a refinery unit and a stream of uncalcined coke. The refinery unit effluent gas may be the offgas from a rotary kiln calciner. The refin... | 03/25/2008 |
| 7217401 | Mercury removal from activated carbon and/or fly ash A method for reducing the amount of mercury affixed to a sorbent and/or fly ash is disclosed. The method includes the steps of providing an amount of sorbent and/or fly ash wherein at least a portion of the amount of sorbent and/or fly ash has particulates having me... | 05/15/2007 |
| 6948436 | Method and apparatus for the gasification and combustion of animal waste, human waste, and/or biomass using a moving grate over a stationary perforated plate in a configured chamber An apparatus for the combustion of organic waste such as poultry litter/manure, cow manure and swine manure, and/or human waste, and/or biomass using a moving grate over a stationary perforated plate to convert organic waste into usable energy. The unprocessed fuel ... | 09/27/2005 |
| 6942707 | Valorization of by-products in the ecological coal transformation A coal transformation system comprises an ecological coal production unit for transforming raw coal into ecological coal. The production unit has an exhaust for carrying in a storage unit combustible, gaseous, waste by-products generated during the transformation of... | 09/13/2005 |
| 5827403 | Method of designing and manufacturing a delayed coker drum A method of manufacturing a delayed coker drum as used in a refining process to receive coke feedstock as a hot liquid and in which the coke feedstock is cooled and quenched to produce solid coke, the hot liquid causing the drum to initially expand circum... | 10/27/1998 |
| 5728196 | Process for waste thermolysis The present invention relates to a process and system for thermal waste treatment. The method according to the invention comprises subjecting the waste to thermolysis in a furnace to produce from the waste thermolysis gases and carbon containing solids; p... | 03/17/1998 |
| 5635147 | Process of treating the gasification residue formed by the gasification of solid fuels in a fluidized bed In addition to ash and coke, the gasification residue contains alkaline earth metal sulfide and alkaline earth metal oxide because desulfuring agents have been supplied to the gasifier. At temperatures from 5° to 80° C. the gasification residue is mixed... | 06/03/1997 |
| 5478442 | Treatment of petroleum cokes with a puffing inhibitor in a rotary calciner A rotary hearth calciner for treating petroleum cokes with a puffing inhibitor has a horizontal or inwardly sloping hearth floor rotatable around a vertical axis for receiving particles of coke to be calcined and a central opening in the hearth floor for ... | 12/26/1995 |
| 5464876 | Process for the recovery of valuable materials during the work-up of polyvinyl chloride Heating of polyvinyl chloride, in particular plasticizer-containing polyvinyl chloride, to a temperature of from 250° to 500° C. in the absence of oxygen gives a low-chlorine, carbon-containing residue, plasticizer and hydrogen chloride.... | 11/07/1995 |
| 5393311 | Method and apparatus for desulfurizing coal A method and apparatus for desulfurizing coal is provided. The method involves combining non-pulverized sulfur containing coal with an adsorbent material, such as aluminum oxide, in a vessel, irradiating the coal/adsorbent combination with microwave energ... | 02/28/1995 |
| 5350431 | Process for chemical desulfurization of coal A process for chemical desulfurization of coal, in which coal is brought into contact with a desulfurizing agent after or while the coal is irradiated with ultraviolet light, thereby to give remarkably high desulfurization ratios and remarkably high yield... | 09/27/1994 |
| 5302254 | Process and plant for the thermolysis of industrial and/or urban waste A plant for treating industrial and/or urban waste includes a stage for drying of the waste, followed by a stage for effecting thermolysis of the dried waste and a stage for effecting recovery of the solids and gases resulting from the thermolysis. Thermo... | 04/12/1994 |
| 5262577 | Method to convert refuse derived fuel into a combustible gas Method to convert refuse derived fuel (RDF) into a combustible gas, whereby the refuse derived fuel is gasified and the derived gas undergoes a process of catalytic cracking in which at least one alkaline additive or an equivalent product is used, the gas... | 11/16/1993 |
| 5085764 | Process for upgrading coal In a process for reducing the sulfur and ash contents of coal, coal is sequentially contacted with fused alkali metal caustic, wash water, and acid. Contacting the coal with the caustic produces water-soluble compounds. Sufficient wash water is used to re... | 02/04/1992 |
| 5071515 | Method for improving the density and crush resistance of coke The density and crush resistance of calcined coke are improved by depositing coker feedstock on green (uncalcined) coke, thereafter subjecting the coke to a heat soak and then calcining the coke.... | 12/10/1991 |
| 5059307 | Process for upgrading coal In a process for reducing the sulfur and ash contents of coal, coal is sequentially contacted with fused alkali metal caustic, water, carbonic acid, and a strong acid. Caustic removed from the coal by the water and the carbonic acid is recovered as anhydr... | 10/22/1991 |
| 5007987 | Method for producing needle coke The friability of green needle coke is reduced by heating the green needle coke to a temperature between about 875° F. and about 1,200° F. for a time sufficient to reduce the friability of the green needle coke.... | 04/16/1991 |
| 4983187 | Method for preparing a high-concentration solids suspension in water A method is described for preparing a high-concentration solids suspension, in particular coal or petroleum coke, which can be transported by pipe and be burnt with low emission of harmful substances, comprising crushing the solid to be suspended to a max... | 01/08/1991 |
| 4946658 | Addition of pyritic materials to feed mix for desulfurization of phosphogypsum A pelletized mixture of gypsum, carbonaceous material and pyrite is charged to a travelling grate where the charge is heated under suitable conditions to produce a solid sintered material which has a broad spectrum of applications due to its chemical and ... | 08/07/1990 |
| 4894122 | Continuous process for the desulphurization of carbonaceous residuals from distillation of petroleum using a plurality of fluidized beds A process for the desulphurization of residuals of petroleum distillation in the form of coke particles having an initial sulphur content greater than about 5% by weight. Desulphurization is effected by means of a continuous electrothermal process based o... | 01/16/1990 |
| 4888029 | Desulfurization of carbonaceous materials A process for desulfurizing carbonaceous material containing inorganic bound sulfur, organic bound sulfur, or conbinations thereof. The process comprises reacting the carbonaceous material at desulfurization conditions with a hydrogen source material in t... | 12/19/1989 |
| 4886522 | Process, for the desulfurization of coal A desulfurization process for coal ore for the removal of both organic and inorganic (pyritic) sulfurs in coal ore comprises a series of steps including the pulverizing of coal ore; mixing coal particulates with separation reagents, a catalyst and a vehic... | 12/12/1989 |
| 4875979 | Treatment of petroleum cokes to inhibit coke puffing A process for treating high sulfur petroleum coke to inhibit puffing is disclosed wherein particles of the petroleum coke are contacted, in the absence of a binder, with a compound containing an alkali or alkaline earth metal selected from the group consi... | 10/24/1989 |
| 4832701 | Process for the regeneration of an additive used to control emissions during the combustion of high sulfur fuel A regenerating process comprises leaching a combustion ash with water so as to dissolve same and form a pregnant leach liquor containing the additive which is separated from the solid residue. The pregnant leach liquor is thereafter adjusted with a base p... | 05/23/1989 |
| 4804390 | Process for removing mineral impurities from coals and oil shales A process for removing mineral impurities such as metal oxides from coal and shale oil structures is disclosed. The process is carried out by subjecting crushed coal or shale to a hydrocarbon fluoride leaching solution, separating the HF leach liquor from... | 02/14/1989 |
| 4764318 | Process for the continuous coking of pitches and utilization of the coke obtained thereby Coke for reactor graphite is produced continuously by coking a hard pitch with a softening point (K.-S.) above 130° C. and a coking residue of at least 45% by weight in a rotary pipe furnace equipped with a moving device and subsequent calcination withou... | 08/16/1988 |
| 4752359 | Method of producing active form coke Active form coke is made from coal by passing the coal granulate downwardly through a preheating and pyrolysis zone, a heating zone, an aftertreatment zone and a cooling zone by moving respective grate bars of grates in each zone so that a bed of granules... | 06/21/1988 |
| 4743271 | Process for producing a clean hydrocarbon fuel This invention discloses processes for the treatment of coal and coal derivatives in order to remove contaminates to produce a high purity coal product. The processes generally comprise a sequential acid leaching in which a hydrofluoric acid leach is foll... | 05/10/1988 |
| 4741741 | Chemical beneficiation of coal Chemical beneficiation of coal and other carbonaceous solids utilizing hydrofluoric acid and ammonium chloride.... | 05/03/1988 |
| 4738753 | Method of producing carbonaceous bodies The method employs a furnace, wherein organic distillation products released from the binder and the gaseous and particulate decomposition products are burned off. Bodies, placed on the ceramic bottom plate of a truck, are introduced into the pre-heating ... | 04/19/1988 |
| 4725337 | Method for drying low rank coals A process is disclosed for removing a substantial portion of water and impurities from low rank coal and peat, whereby an improved coal or peat product (not found in nature) is obtained. The low rank coal and peat are subjected to a superheated gaseous me... | 02/16/1988 |
| 4718984 | Apparatus for calcining coke An internally-fired vertical shaft kiln for calcining coke wherein a downwardly moving coke bed has a co-current preheat gas stream in the upper portion of the kiln and a counter-current combustion gas stream in the lower portion of the kiln. Both gases a... | 01/12/1988 |
| 4701183 | Process for removing sulfur from coal A process for removing sulfur from coal comprising the steps of forming a slurry of coal, a carrier liquid, and a compound selected from the group consisting of carboxylic acid, percarboxylic acid, salts of carboxylic acid, and salts of percarboxylic acid... | 10/20/1987 |
| 4695290 | Integrated coal cleaning process with mixed acid regeneration The present invention provides processes for the continuous removal of contaminants from coal to produce a clean purified fuel. The processes generally comprise producing a clean coal product having a mineral matter content of less than about 5 percent by... | 09/22/1987 |
| 4681598 | Method of removing pyritic sulfur from coal Pyritic sulfur is removed from coal to concentrate gas fraction collecting a gas fraction at decomposition temperatures within the range from 375° to 550° C. The collected fraction contains at least 60% of the total composable sulfur and not over 40% of... | 07/21/1987 |
| 4678478 | Method for desulfurization of coal A process and apparatus for desulfurizing coal which removes sulfur in the inorganic and organic form by preferentially heating the inorganic iron sulfides in coal in a flowing gas to convert some of the inorganic iron sulfides from a pyrite form FeS... | 07/07/1987 |
| 4661240 | Low sulfur coke using dispersed calcium The sulphur emissive capability, on combustion, of coke which is formed during upgrading of sulphur-containing heavy crude oils, including oil sands bitumen, and residua, is decreased by the addition of calcium carbonate, calcium hydroxide or calcium oxid... | 04/28/1987 |
| 4661118 | Method for oxidation of pyrite in coal to magnetite and low field magnetic separation thereof A method for increasing the magnetization of pyrite-containing pulverized coal comprises heating the coal in an atmosphere of inert gas, desirably nitrogen, containing 3 to 60 torr, preferably 12 to 16 torr, partial pressure of air to a temperature in the... | 04/28/1987 |
| 4640692 | Process for the elimination of pyrite A process for the removal of pyritic sulfur from shale, coal and other carbonaceous material which comprises reacting a pyritic containing solid with a acidic cerium IV salt solution.... | 02/03/1987 |
