| Patent Number |
Title Of Patent |
Date Issued |
| 4241027 |
Reductive stripping process for the recovery of either or both uranium and vanadium |
December 23, 1980 |
| A process for the reductive stripping of an organic phase containing either or both uranium and vanadium. Said process comprising contacting said organic phase containing either or both uranium in the hexavalent state and vanadium in the pentavalent state with an aqueous solution contain |
| 4236896 |
Slurry removal process |
December 2, 1980 |
| In a process for the removal and pressure reduction of a high pressure, high temperature slurry from a process vessel, the slurry is mixed with a make-up liquid in a temperature treatment vessel to form a diluted slurry, which is passed through a cooling apparatus, and a recycle portion |
| 4227994 |
Operation of a coal deashing process |
October 14, 1980 |
| A process for maintaining the fluid-like properties of separate phases formed within a continuous coal deashing process during periods in which the flow of feed to the apparatus is interrupted. In operation, when the flow of feed is interrupted, the flow of solvent to the separation |
| 4225420 |
Process for improving soluble coal yield in a coal deashing process |
September 30, 1980 |
| Coal liquefaction products are contacted with a deashing solvent and introduced into a first separation zone. The first separation zone is maintained at an elevated temperature and pressure, determined to maximize the recovery of soluble coal products, to cause said coal liquefaction |
| 4225396 |
Vanadium and uranium oxidation by controlled potential electrolysis |
September 30, 1980 |
| A process and apparatus for oxidizing vanadium and uranium in wet process phosphoric acid to a higher valence state for extraction by subsequent contact with complex organic extractants. The wet process phosphoric acid is oxidized in an electrolytic cell operated at a controlled potentia |
| 4222826 |
Process for oxidizing vanadium and/or uranium |
September 16, 1980 |
| The present invention provides a process for rapidly and efficiently oxidizing either or both vanadium and uranium from the trivalent and guadrivalent oxidation states, respectively, to the pentavelent and hexavalent oxidation states, respectively, through the use of a special electr |
| 4212849 |
Simultaneous extraction and recovery of uranium and vanadium from wet process acids |
July 15, 1980 |
| A process for the simultaneous coextraction of uranium and vanadium from an aqueous acidic solution containing the same comprising contacting said aqueous acidic solution with an organic phase comprising a mixture of (a) an alkyl substituted diaryl phosphoric acid, (b) a trialkylphosphin |
| 4199552 |
Process for the production of synthetic rutile |
April 22, 1980 |
| An improved process for the production of synthetic rutile from ore containing titanium and iron, such as ilmenite ore, by a multi-step procedure employing controlled reduction, controlled oxidation and acid leaching. More specifically, the ilmenite ore first is reduced thermally suc |
| 4189372 |
Process for the hydroconversion of coal |
February 19, 1980 |
| This invention relates to a process for producing coal derived, hydrogen-rich donor fractions from fractions of coal liquefaction products for use in the hydroconversion of coal. Coal liquefaction products are subjected to a critical solvent deashing process to produce various deashe |
| 4189357 |
Method of treating a substrate material to form an electrode |
February 19, 1980 |
| The present invention relates to an improved method of treating a substrate material selected from the group consisting of titanium, tantalum, zirconium, niobium, hafnium and their alloys to form an electrode. Broadly, the improved method comprises anodically treating the substrate m |
| 4178981 |
Copper casting method using titanium dioxide release method |
December 18, 1979 |
| A copper mold release material comprising titanium dioxide slurried in a liquid medium. The titanium dioxide is easily removed from a casting, if any adhers thereto, by washing with, for example, water and does not contaminate electrolytes utilized in electrolytic refining processes. |
| 4177135 |
Use of specific coal components to improve soluble coal product yield in a coal deashing process |
December 4, 1979 |
| A process for improving the yield of soluble coal products separated from a residuum feed in a coal deashing process. In operation, an additive comprising (i) at least a portion of a distillate fraction preferably recovered from the coal liquefaction products from which the residuum feed |
| 4177134 |
Separation technique in a coal deashing process |
December 4, 1979 |
| An improved coal deashing process wherein a feed mixture comprising soluble coal products, insoluble coal products, and deashing solvent at a first temperature level is separated in a first separation zone into a first light fraction and a first heavy fraction comprising the insoluble co |
| 4164466 |
Method of improving yield in a coal liquefaction product deashing process |
August 14, 1979 |
| A coal deashing process wherein a feed mixture comprising soluble coal products, insoluble coal products and solvent is separated in a first separation zone into a first heavy phase and a first light phase comprising soluble coal products, solvent and some insoluble coal products. Th |
| 4162965 |
Process for the removal of solid particulate materials from crude shale oils |
July 31, 1979 |
| This invention relates to a process for removing finely divided insoluble particulate materials from crude shale oils. A feed comprising crude shale oil that contains insoluble particulate material is mixed with a solvent and thereafter separated in a first separation zone into a first l |
| 4162964 |
Method of handling ash-rich material in a coal deashing process |
July 31, 1979 |
| A process and apparatus for maintaining continuous operation of a coal deashing process during periods of normal operation wherein a dry, powdery ash concentrate composition is produced and during process upsets wherein undesired semi-solids or fluid compositions are produced. |
| 4162958 |
Process for the discharge of ash concentrate from a coal deashing system |
July 31, 1979 |
| An improved process for the continuous discharge from a first separation zone of a first heavy fraction comprising insoluble coal products and solvent in a coal deashing process utilizing solvents at elevated pressures and temperatures near the critical temperature of the solvent. Th |
| 4162957 |
Method of feeding solids to a process unit |
July 31, 1979 |
| The present invention relates to a process wherein solidified coal liquefaction products with or without other solid materials can be simultaneously melted and introduced at an elevated pressure into a process unit. The melting and introduction of the coal liquefaction products with |
| 4162956 |
Coal deashing process having improved solvent recovery techniques |
July 31, 1979 |
| An improved coal deashing process wherein coal is mixed with a coal liquefaction process solvent, solubilized and flashed to provide a prepared mixture and the prepared mixture is mixed with a deashing solvent to produce a feed mixture. Thereafter, the feed mixture is separated in a |
| 4160566 |
Mining apparatus |
July 10, 1979 |
| An improved mining apparatus for excavating material, such as coal, for example, from an earth formation, such as a coal seam, for example, wherein a miner, having a forward and a rearward cutter, is guided through the coal seam and excavates a borehole therein, the borehole being filled |
| 4153538 |
Use of deashed coal as a flushing agent in a coal deashing process |
May 8, 1979 |
| A process for maintaining the fluid-like properties of a heavy phase being withdrawn from a separation zone maintained at elevated temperature and pressure during periods in which the flow of this heavy phase is terminated due to pressure reduction valve plugging or to permit cleaning |
| 4119524 |
Coal deashing process having improved solvent recovery techniques |
October 10, 1978 |
| An improved coal deashing process wherein coal is mixed with a first dissolving solvent, solubilized and flashed to provide a prepared mixture, and the prepared mixture is mixed with a second dissolving solvent to produce a feed mixture. The insoluble coal products produced are separated |
| 4119523 |
Processes for the production of deashed coal |
October 10, 1978 |
| An improved coal deashing process wherein soluble dissolved coal present in the ash concentrate product stream from a critical solvent deashing process can be separated and recovered from the ash concentrate by at least two alternate processing systems.In one such system, the ash concent |
| 4119519 |
Bipolar electrode for use in an electrolytic cell |
October 10, 1978 |
| An improved bipolar electrode having an anodic member and a cathodic member connected in an assembled position spaced a distance apart with a connector constructed of an electrically conductive material disposed between and engaging portions of the anodic member and the cathodic memb |
| 4094810 |
Aqueous slurry of ash concentrate composition and process for producing same |
June 13, 1978 |
| An improved process for providing an aqueous slurry of an ash concentrate composition wherein predetermined amounts of the composition are mixed into a solution of water and a surfactant at a predetermined rate. The slurry is pumpable and is produced via the process of the present in |
| 4093936 |
Logging method and apparatus |
June 6, 1978 |
| A logging method and apparatus for measuring parameters of an earth formation near a borehole wherein a first downhole logging device is connected to a first surface measuring apparatus via a coaxial cable in a first mode of operation of the logging apparatus and wherein a second dow |
| 4092237 |
Process for treating oil shales |
May 30, 1978 |
| In accordance with this invention, oil shale is introduced into a lock which discharges into a closed, vertical, stationary kiln fitted with mechanisms which cause the particulate oil shale to move continuously downwardly in a controlled, uniform plug type flow. The shale is heated by |
| 4090958 |
Coal processing system for producing a stream of flowable insoluble coal products |
May 23, 1978 |
| An improved coal processing system wherein a feed mixture (including coal, dissolving solvent, insoluble coal products and soluble coal products) at a first temperature level is separated in a first separation zone into a heavy fraction including the insoluble coal products and a light f |
| 4090957 |
System for separating soluble and insoluble coal products from a feed mixture |
May 23, 1978 |
| An improved coal processing system wherein relatively small droplets of a feed mixture (including both soluble and insoluble coal products) are dispersed in a first separation zone and contacted, countercurrently with a dissolving solvent to form a heavy fraction containing the insoluble |
| 4070268 |
Solvent recovery in a coal deashing process |
January 24, 1978 |
| An improved coal deashing process wherein coal is mixed with a first dissolving solvent, heated, solubilized and flashed to provide a prepared mixture. The flashing is effected at a temperature below about 650.degree. F. to increase the amount of the first dissolving solvent in the prepa |
| 4070267 |
Coal processing system for reducing the amount of insoluble coal products in a light fraction st |
January 24, 1978 |
| An improved system for processing coal wherein a feed mixture (comprising a dissolving solvent, insoluble coal products and soluble coal products) is separated in a first separation zone, provided with a coalescing section, into a first heavy fraction and a first light fraction (comprisi |
| 4028219 |
Process for the production of deashed coal liquifaction products |
June 7, 1977 |
| This invention relates to an improved process for the production of deashed coal which includes contacting coal with coal dissolving solvent at elevated temperature and pressure in a hydrogen atmosphere and thereafter passing the resulting mixture to a vacuum tower to remove coal dissolv |
| 3981929 |
Method of separating methylolphenols from solutions |
September 21, 1976 |
| A method of separating methylolphenols from an organic solution containing the methylolphenols by contacting the organic solution with an aqueous alkaline borate solution in which lithium ions are present in a quantity greater than any other single alkali metal ion for a period of time |
