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| Number | Title | Issue Date |
| 6927260 | Optimization of heat removal in a gas-phase fluidized-bed process A process for preparing polyethylene from “feed ethylene” comprises: a) a hydrogenation stage in which “feed ethylene” containing impurities or secondary components such as acetylene and ethane is reacted with hydrogen to remove the acetylene by catalytic hy... | 08/09/2005 |
| 5122260 | Liquefaction of solid carbonaceous material with catalyst recycle In the two stage liquefaction of a carbonaceous solid such as coal wherein coal is liquefied in a first stage in the presence of a liquefaction solvent and the first stage effluent is hydrogenated in the presence of a supported hydrogenation catalyst in a... | 06/16/1992 |
| 5120429 | Co-processing of carbonaceous solids and petroleum oil In a process for producing distillates from coal by a first stage thermal liquefaction followed by a catalytic hydrogenation, liquefaction solvent is added at points spaced over the length of the thermal liquefaction heater. Coal may be co-processed with ... | 06/09/1992 |
| 4879021 | Hydrogenation of coal and subsequent liquefaction of hydrogenated undissolved coal A process for the hydrogenation of undissolved coal and subsequent liquefaction of the hydrogenated coal particles to provide useful hydrocarbon liquid products including naphtha, gasoline and diesel fuel. These low boiling hydrocarbon liquids are produce... | 11/07/1989 |
| 4846963 | Ionic liquefaction process A coal liquefaction process using ionic liquefaction techniques with polar solvent solubilizing agents and water soluble inorganic compounds, produces a carbonaceous liquefaction product which is separated from the process stream by the use of methanol as... | 07/11/1989 |
| 4629554 | Coal liquefaction with coal tar solvent A method of liquefying coal in which coal is mixed with a process solvent comprising at least partially hydrogenated coal tar material to produce a coal-solvent slurry. This slurry is treated under coal-liquefying conditions, preferably including a hydrog... | 12/16/1986 |
| 4605486 | Coal liquefaction process with increased naphtha yields An improved process for liquefying solid carbonaceous materials wherein the solid carbonaceous material is slurried with a suitable solvent and then subjected to liquefaction at elevated temperature and pressure to produce a normally gaseous product, a no... | 08/12/1986 |
| 4578175 | Combined process for coal pyrolysis and char gasification Finely divided coal is reacted in a combination of processes comprising flash pyrolysis and fluidized bed gasification of char from the pyrolysis. A portion of the char which is heated by the steam-oxygen gasification provides the heat for the pyrolysis s... | 03/25/1986 |
| 4551224 | Coal liquefaction process Process for liquefying coal or similar liquefiable carbonaceous solids in which the liquefaction solvent is a hydrotreated solvent mixture that is derived in the process. The solvent mixture comprises at least 78 wt. % decalin, comprising cis and trans de... | 11/05/1985 |
| 4539096 | Process for recovering oil and metals from oil shale A process for the recovery of oil and metal values from oil shale which includes the step of acid leaching in combination with selective extraction of nitrogen components from the resultant product shale oil. The extracted nitrogen rich stream can either ... | 09/03/1985 |
| 4537675 | Upgraded solvents in coal liquefaction processes New solvent compositions and a new two-stage direct coal liquefaction process are provided which permit control of the liquid product state from one consisting primarily of low boiling distillate to one consisting primarily of high boiling fuel oil. The u... | 08/27/1985 |
| 4536277 | Shale oil stabilization with a hydrogen donor quench and a hydrogen transfer catalyst A process is provided to produce and stabilize shale oil. In the process, raw oil shale is retorted with heat carrier material to liberate an effluent product stream comprising hydrocarbons and entrained particulates of oil shale dust. In order to minimiz... | 08/20/1985 |
| 4519895 | Process for converting a carbonaceous material to lower paraffinic hydrocarbons and monocyclic aromatic hydrocarbons A carbonaceous material is subjected, in admixture with a hydrogenated recycle oil, to hydrogenation in two successive steps at respective temperature ranges of 350°-470° C. and 600°-1000° C., under a pressure of at least 20 bars, the resulting p... | 05/28/1985 |
| 4518480 | Process for the efficient utilization of solvent modified oil shales A combination process for the treatment of oil shale to recover hydrocarbonaceous material therefrom comprising the steps of solvent treating said oil shale, sequentially solvent extracting said treated oil shale, hydrotreating the extracts and processing... | 05/21/1985 |
| 4495055 | Coal catalytic hydrogenation process using direct coal slurry feed to reactor with controlled mixing conditions A process for improved catalytic hydrogenation of coal to produce increased yields of low boiling hydrocarbon liquids and gas products, in which a coal-oil slurry is fed directly with only limited preheating into an ebullated bed catalytic reaction zone t... | 01/22/1985 |
| 4485008 | Liquefaction process An improved liquefaction process for solid carbonaceous materials wherein at least a portion of the liquefaction is accomplished in the presence of an added hydrogenation catalyst and a solvent containing at least 1.25 wt % donatable hydrogen and in the p... | 11/27/1984 |
| 4476009 | Process for improving the hydrogen donor properties of a coal liquefaction solvent A process for improving the properties of a hydrogen donor coal liquefaction solvent employed in a coal liquefaction process which comprises separating said coal liquefaction solvent into a first fraction boiling in the range from about 350° to about 675... | 10/09/1984 |
| 4452688 | Integrated coal liquefication process Hydrogen conservation in solvent refining of coal is practiced and solvent compositions and adjusted to needs of two stage operation. The first stage is a short residence time dissolution in a recycle solvent rich in phenols and polyaromatics of high boil... | 06/05/1984 |
| 4448665 | Use of ammonia to reduce the viscosity of bottoms streams produced in hydroconversion processes Coal, petroleum residuum and similar carbonaceous feed materials are subjected to hydroconversion in the presence of molecular hydrogen to produce a hydroconversion effluent which is then subjected to one or more separation steps to remove lower molecular... | 05/15/1984 |
| 4431510 | Process for producing hydrogen-enriched hydrocarbonaceous products from coal A process for producing hydrogen-enriched hydrocarbonaceous products from coal which comprises: (a) contacting the coal in a solvent extraction zone at solvent extraction conditions with a coal solvent, hydrogen and a first residual oil containing asphalt... | 02/14/1984 |
| 4428818 | Liquefaction of coal Solvent refining of coal is conducted with a blend of coals calculated to maintain the phenols of the steady state recycle solvent within desired limits.... | 01/31/1984 |
| 4400261 | Process for coal liquefaction by separation of entrained gases from slurry exiting staged dissolvers There is described an improved liquefaction process by which coal is converted to a low ash and low sulfur carbonaceous material that can be used as a fuel in an environmentally acceptable manner without costly gas scrubbing equipment. In the process, coa... | 08/23/1983 |
| 4385982 | Process for recovery of bitumen from tar sands Bitumen contained in tar sands is extracted in a primary extraction step which produces a bitumen-containing froth. A hydrogen donor diluent solvent is added to the froth, and the froth-solvent mix is subjected to a desalting operation. A bitumen-solvent ... | 05/31/1983 |
| 4374725 | Process for coal liquefaction In two stage solvent refining of coal by mixing comminuted coal with a solvent produced in the process under hydrogen pressure for initial solubilization and reacting the mixture under hydrogen pressure in a second stage, the overall process is improved b... | 02/22/1983 |
| 4372838 | Coal liquefaction process A coal conversion process which produces an increased yield of distillable products through an efficient use of hydrogen. Coal is contacted with a liquefaction solvent comprised of a process derived light phase residuum and a process derived distillate un... | 02/08/1983 |
| 4356077 | Pyrolysis process Pyrolytic vapors, produced by the pyrolysis of coal, are contacted with a quench liquid which comprises a hydrogen donor solvent to condense the pyrolytic vapors and form a liquid mixture which comprises pyrolytic condensate. The liquid mixture is separat... | 10/26/1982 |
| 4347116 | Two-stage coal liquefaction Two-stage coal liquefaction is improved by separating a light fraction from the first (dissolving) stage effluent, hydrogenating that fraction and reblending the hydrogenated light fraction with the material passed from the first stage to the second stage... | 08/31/1982 |
| 4345989 | Catalytic hydrogen-donor liquefaction process Coal or a similar solid carbonaceous feed material is converted into lower molecular weight liquid hydrocarbons by contacting the feed material with a hydrogen-donor solvent containing above about 0.6 weight percent donatable hydrogen and molecular hydrog... | 08/24/1982 |
| 4344838 | Coal conversion catalysts A solvent extraction process for coal conversion wherein coal liquids are contacted with spent petroleum hydrogenation catalyst or spent demetallizing guard chamber adsorbent.... | 08/17/1982 |
| 4334977 | Method for the generation of recycle solvents in coal liquefaction A method is described to improve a coal liquefaction process by the use of a recycle solvent comprised of two fractions: the first, a lower boiling fraction, is obtained by an atmospheric distillation and is subsequently hydrotreated to enrich its hydroge... | 06/15/1982 |
| 4333815 | Coal liquefaction in an inorganic-organic medium Improved process for liquefaction of coal by contacting pulverized coal in an inorganic-organic medium solvent system containing a ZnCl2 catalyst, a polar solvent with the structure RX where X is one of the elements O, N, S or P, and R is hydro... | 06/08/1982 |
| 4332666 | Coal liquefaction process wherein jet fuel, diesel fuel and/or ASTM No. 2 fuel oil is recovered An improved process for the liquefaction of coal and similar solid carbonaceous materials wherein a hydrogen donor solvent or diluent derived from the solid carbonaceous material is used to form a slurry of the solid carbonaceous material and wherein the ... | 06/01/1982 |
| 4332668 | Pretreatment of solid carbonaceous material with dicarboxylic aromatic acids to prevent scale formation Scale formation during the liquefaction of lower ranking coals and similar carbonaceous materials is significantly reduced and/or prevented by pretreatment with a pretreating agent selected from the group consisting of phthalic acid, phthalic anhydride, p... | 06/01/1982 |
| 4331531 | Three-stage coal liquefaction process Disclosed is a three-stage process for liquefying coal. In the process, subdivided coal is slurried with a hydrogen-lean hydrogen-donor solvent and passed through a dissolving zone at a temperature in the range 400° to 480° C. and at a space velocity in... | 05/25/1982 |
| 4326946 | Process for manufacture of solvent for coal liquefaction A process of producing a solvent useful in coal liquefaction which includes separating the heavy liquid produced from the liquefaction of coal into a fraction boiling at 200° to 210° C., a fraction boiling at 211° to 230° C., and a fraction boiling at... | 04/27/1982 |
| 4325803 | Process for hydrogenation/extraction of organics contained in rock A method for the separation and recovery of organic material from rock, including the steps of forming a slurry containing the rock bearing the organic material and hydrogenating said material via a hydrogen transfer agent which is a liquid at standard co... | 04/20/1982 |
| 4325801 | Three-stage coal liquefaction process Disclosed is a three-stage process for liquefying coal in which a coal-solvent slurry is sequentially passed through a first dissolving stage and two catalytic reaction stages in series. The first catalytic reaction stage contains a catalyst having a sele... | 04/20/1982 |
| 4324639 | Pyrolysis process with feed pretreatment In a process for recovery of values contained in solid carbonaceous material, a solid carbonaceous material is comminuted and then treated at an elevated temperature with a capping agent which is at treating conditions either a liquid or a gas. The treati... | 04/13/1982 |
| 4324638 | Pyrolysis process for stabilizing volatile hydrocarbons In a process for recovery of values contained in solid carbonaceous material, the solid carbonaceous material is comminuted and then subjected to pyrolysis in the presence of a capping agent, and preferably in the presence of a solid particulate source of... | 04/13/1982 |
| 4324637 | Pyrolysis process with feed pretreatment utilizing a beneficially reactive gas In a process for recovery of values contained in solid carbonaceous material, a solid carbonaceous material is comminuted and then treated in a pretreating zone at an elevated temperature with a capping agent which is at treating conditions either a liqui... | 04/13/1982 |
